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Naltrexone - Wikipedia

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<li id="toc-Alcohol_use_disorder" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Alcohol_use_disorder"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Alcohol use disorder</span> </div> </a> <ul id="toc-Alcohol_use_disorder-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Opioid_use_disorder" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Opioid_use_disorder"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Opioid use disorder</span> </div> </a> <ul id="toc-Opioid_use_disorder-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Others" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Others"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Others</span> </div> </a> <ul id="toc-Others-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Available_forms" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Available_forms"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Available forms</span> </div> </a> <ul id="toc-Available_forms-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Contraindications" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Contraindications"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Contraindications</span> </div> </a> <ul id="toc-Contraindications-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Side_effects" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Side_effects"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Side effects</span> </div> </a> <button aria-controls="toc-Side_effects-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Side effects subsection</span> </button> <ul id="toc-Side_effects-sublist" class="vector-toc-list"> <li id="toc-Opioid_withdrawal" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Opioid_withdrawal"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Opioid withdrawal</span> </div> </a> <ul id="toc-Opioid_withdrawal-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Adverse_effects" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Adverse_effects"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Adverse effects</span> </div> </a> <ul id="toc-Adverse_effects-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Liver_damage" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Liver_damage"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Liver damage</span> </div> </a> <ul id="toc-Liver_damage-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Overdose" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Overdose"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Overdose</span> </div> </a> <ul id="toc-Overdose-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Pharmacology" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Pharmacology"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Pharmacology</span> </div> </a> <button aria-controls="toc-Pharmacology-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Pharmacology subsection</span> </button> <ul id="toc-Pharmacology-sublist" class="vector-toc-list"> <li id="toc-Pharmacodynamics" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pharmacodynamics"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Pharmacodynamics</span> </div> </a> <ul id="toc-Pharmacodynamics-sublist" class="vector-toc-list"> <li id="toc-Opioid_receptor_blockade" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Opioid_receptor_blockade"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1.1</span> <span>Opioid receptor blockade</span> </div> </a> <ul id="toc-Opioid_receptor_blockade-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other_activities" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Other_activities"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1.2</span> <span>Other activities</span> </div> </a> <ul id="toc-Other_activities-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Pharmacokinetics" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pharmacokinetics"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Pharmacokinetics</span> </div> </a> <ul id="toc-Pharmacokinetics-sublist" class="vector-toc-list"> <li id="toc-Absorption" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Absorption"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2.1</span> <span>Absorption</span> </div> </a> <ul id="toc-Absorption-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Distribution" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Distribution"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2.2</span> <span>Distribution</span> </div> </a> <ul id="toc-Distribution-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Metabolism" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Metabolism"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2.3</span> <span>Metabolism</span> </div> </a> <ul id="toc-Metabolism-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Elimination" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Elimination"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2.4</span> <span>Elimination</span> </div> </a> <ul id="toc-Elimination-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Pharmacogenetics" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pharmacogenetics"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>Pharmacogenetics</span> </div> </a> <ul id="toc-Pharmacogenetics-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Chemistry" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Chemistry"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Chemistry</span> </div> </a> <button aria-controls="toc-Chemistry-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Chemistry subsection</span> </button> <ul id="toc-Chemistry-sublist" class="vector-toc-list"> <li id="toc-Analogues" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Analogues"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.1</span> <span>Analogues</span> </div> </a> <ul id="toc-Analogues-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Society_and_culture" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Society_and_culture"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Society and culture</span> </div> </a> <button aria-controls="toc-Society_and_culture-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Society and culture subsection</span> </button> <ul id="toc-Society_and_culture-sublist" class="vector-toc-list"> <li id="toc-Generic_names" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Generic_names"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.1</span> <span>Generic names</span> </div> </a> <ul id="toc-Generic_names-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Brand_names" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Brand_names"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.2</span> <span>Brand names</span> </div> </a> <ul id="toc-Brand_names-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Controversies" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Controversies"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.3</span> <span>Controversies</span> </div> </a> <ul id="toc-Controversies-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Film" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Film"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.4</span> <span>Film</span> </div> </a> <ul id="toc-Film-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Research" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Research"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Research</span> </div> </a> <button aria-controls="toc-Research-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Research subsection</span> </button> <ul id="toc-Research-sublist" class="vector-toc-list"> <li id="toc-Depersonalization" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Depersonalization"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.1</span> <span>Depersonalization</span> </div> </a> <ul id="toc-Depersonalization-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Low-dose_naltrexone" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Low-dose_naltrexone"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.2</span> <span>Low-dose naltrexone</span> </div> </a> <ul id="toc-Low-dose_naltrexone-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Self-injury" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Self-injury"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.3</span> <span>Self-injury</span> </div> </a> <ul id="toc-Self-injury-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Behavioral_disorders" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Behavioral_disorders"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.4</span> <span>Behavioral disorders</span> </div> </a> <ul id="toc-Behavioral_disorders-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Interferon_alpha" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Interferon_alpha"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.5</span> <span>Interferon alpha</span> </div> </a> <ul id="toc-Interferon_alpha-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Critical_addiction_studies" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Critical_addiction_studies"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.6</span> <span>Critical addiction studies</span> </div> </a> <ul id="toc-Critical_addiction_studies-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sexual_addiction" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sexual_addiction"> <div class="vector-toc-text"> <span class="vector-toc-numb">9.7</span> <span>Sexual addiction</span> </div> </a> <ul id="toc-Sexual_addiction-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Naltrexone</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 32 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-32" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">32 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%86%D8%A7%D9%84%D8%AA%D8%B1%D9%8A%D9%83%D8%B3%D9%88%D9%86" title="نالتريكسون – Arabic" lang="ar" hreflang="ar" data-title="نالتريكسون" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%86%D8%A7%D9%84%D8%AA%D8%B1%D9%88%DA%A9%D8%B3%D8%A7%D9%86" title="نالتروکسان – South Azerbaijani" lang="azb" hreflang="azb" data-title="نالتروکسان" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9D%D0%B0%D0%BB%D1%82%D1%80%D0%B5%D0%BA%D1%81%D0%BE%D0%BD" title="Налтрексон – Bulgarian" lang="bg" hreflang="bg" data-title="Налтрексон" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Naltrexon" title="Naltrexon – Czech" lang="cs" hreflang="cs" data-title="Naltrexon" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Naltrecson" title="Naltrecson – Welsh" lang="cy" hreflang="cy" data-title="Naltrecson" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Naltrexon" title="Naltrexon – German" lang="de" hreflang="de" data-title="Naltrexon" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Naltrexona" title="Naltrexona – Spanish" lang="es" hreflang="es" data-title="Naltrexona" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%86%D8%A7%D9%84%D8%AA%D8%B1%D9%88%DA%A9%D8%B3%D8%A7%D9%86" title="نالتروکسان – Persian" lang="fa" hreflang="fa" data-title="نالتروکسان" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Naltrexone" title="Naltrexone – French" lang="fr" hreflang="fr" data-title="Naltrexone" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%82%A0%ED%8A%B8%EB%A0%89%EC%86%90" title="날트렉손 – Korean" lang="ko" hreflang="ko" data-title="날트렉손" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%86%D5%A1%D5%AC%D5%BF%D6%80%D5%A5%D6%84%D5%BD%D5%B8%D5%B6" title="Նալտրեքսոն – Armenian" lang="hy" hreflang="hy" data-title="Նալտրեքսոն" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Naltrekson" title="Naltrekson – Indonesian" lang="id" hreflang="id" data-title="Naltrekson" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Naltrex%C3%B3n" title="Naltrexón – Icelandic" lang="is" hreflang="is" data-title="Naltrexón" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Naltrexone" title="Naltrexone – Italian" lang="it" hreflang="it" data-title="Naltrexone" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A0%D7%9C%D7%98%D7%A8%D7%A7%D7%A1%D7%95%D7%9F" title="נלטרקסון – Hebrew" lang="he" hreflang="he" data-title="נלטרקסון" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Naltrexon" title="Naltrexon – Dutch" lang="nl" hreflang="nl" data-title="Naltrexon" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%8A%E3%83%AB%E3%83%88%E3%83%AC%E3%82%AD%E3%82%BD%E3%83%B3" title="ナルトレキソン – Japanese" lang="ja" hreflang="ja" data-title="ナルトレキソン" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Naltrekson" title="Naltrekson – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Naltrekson" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%A8%E0%AC%BE%E0%AC%B2%E0%AC%9F%E0%AD%8D%E0%AC%B0%E0%AD%87%E0%AC%95%E0%AD%8D%E0%AC%B8%E0%AD%8B%E0%AC%A8" title="ନାଲଟ୍ରେକ୍ସୋନ – Odia" lang="or" hreflang="or" data-title="ନାଲଟ୍ରେକ୍ସୋନ" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Naltrekson" title="Naltrekson – Polish" lang="pl" hreflang="pl" data-title="Naltrekson" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Naltrexona" title="Naltrexona – Portuguese" lang="pt" hreflang="pt" data-title="Naltrexona" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Naltrexon%C4%83" title="Naltrexonă – Romanian" lang="ro" hreflang="ro" data-title="Naltrexonă" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9D%D0%B0%D0%BB%D1%82%D1%80%D0%B5%D0%BA%D1%81%D0%BE%D0%BD" title="Налтрексон – Russian" lang="ru" hreflang="ru" data-title="Налтрексон" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Naltrexone" title="Naltrexone – Simple English" lang="en-simple" hreflang="en-simple" data-title="Naltrexone" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Naltrekson" title="Naltrekson – Serbian" lang="sr" hreflang="sr" data-title="Naltrekson" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Naltrekson" title="Naltrekson – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Naltrekson" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Naltreksoni" title="Naltreksoni – Finnish" lang="fi" hreflang="fi" data-title="Naltreksoni" data-language-autonym="Suomi" 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div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <a href="/wiki/Naloxone" title="Naloxone">Naloxone</a> or <a href="/wiki/Nalmexone" title="Nalmexone">Nalmexone</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">"Revia" redirects here. For the cantillation mark, see <a href="/wiki/Revia_(Hebrew_cantillation_mark)" title="Revia (Hebrew cantillation mark)">Revia (Hebrew cantillation mark)</a>.</div> <p class="mw-empty-elt"> </p> <div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Pharmaceutical compound</div> <style data-mw-deduplicate="TemplateStyles:r1269284339">@media screen{html.skin-theme-clientpref-night .mw-parser-output .dark_mode_safe img{background-color:var(--background-color-inverted,#f8f9fa)}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .dark_mode_safe img{background-color:var(--background-color-inverted,#f8f9fa)}}</style> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox" style="border-spacing:2px;"><caption class="infobox-title"><span title="International nonproprietary name (INN): Naltrexone">Naltrexone</span></caption><tbody><tr><td colspan="2" class="infobox-image"><span class="skin-invert-image" typeof="mw:File"><a href="/wiki/File:Naltrexone_skeletal.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Naltrexone_skeletal.svg/250px-Naltrexone_skeletal.svg.png" decoding="async" width="200" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Naltrexone_skeletal.svg/330px-Naltrexone_skeletal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Naltrexone_skeletal.svg/500px-Naltrexone_skeletal.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr><tr><td colspan="2" class="infobox-image"><span class="bg-transparent" typeof="mw:File"><a href="/wiki/File:Naltrexone-from-xtal-3D-bs-17.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Naltrexone-from-xtal-3D-bs-17.png/250px-Naltrexone-from-xtal-3D-bs-17.png" decoding="async" width="250" height="167" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Naltrexone-from-xtal-3D-bs-17.png/375px-Naltrexone-from-xtal-3D-bs-17.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Naltrexone-from-xtal-3D-bs-17.png/500px-Naltrexone-from-xtal-3D-bs-17.png 2x" data-file-width="3000" data-file-height="2006" /></a></span></td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd;color:inherit;">Clinical data</th></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;">Pronunciation</th><td class="infobox-data"><span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/ˌ/: secondary stress follows">ˌ</span><span title="&#39;n&#39; in &#39;nigh&#39;">n</span><span title="/æ/: &#39;a&#39; in &#39;bad&#39;">æ</span><span title="&#39;l&#39; in &#39;lie&#39;">l</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="&#39;t&#39; in &#39;tie&#39;">t</span><span title="&#39;r&#39; in &#39;rye&#39;">r</span><span title="/ɛ/: &#39;e&#39; in &#39;dress&#39;">ɛ</span><span title="&#39;k&#39; in &#39;kind&#39;">k</span><span title="&#39;s&#39; in &#39;sigh&#39;">s</span><span title="/oʊ/: &#39;o&#39; in &#39;code&#39;">oʊ</span><span title="&#39;n&#39; in &#39;nigh&#39;">n</span></span>/</a></span></span>&#x20;</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Drug_nomenclature#Trade_names" title="Drug nomenclature">Trade names</a></th><td class="infobox-data">Revia, Vivitrol, Depade, others</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;">Other names</th><td class="infobox-data">EN-1639A; UM-792; ALKS-6428; <i>N</i>-cyclopropylmethylnoroxymorphone; <i>N</i>-cyclopropylmethyl-14-hydroxydihydromorphinone; 17-(cyclopropylmethyl)-4,5α-epoxy-3,14-dihydroxymorphinan-6-one</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/American_Society_of_Health-System_Pharmacists" title="American Society of Health-System Pharmacists">AHFS</a>/<a href="/wiki/Drugs.com" title="Drugs.com">Drugs.com</a></th><td class="infobox-data"><span title="www.drugs.com"><a rel="nofollow" class="external text" href="https://www.drugs.com/monograph/naltrexone.html">Monograph</a></span></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/MedlinePlus" title="MedlinePlus">MedlinePlus</a></th><td class="infobox-data"><span title="medlineplus.gov"><a rel="nofollow" class="external text" href="https://medlineplus.gov/druginfo/meds/a685041.html">a685041</a></span></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Regulation_of_therapeutic_goods" title="Regulation of therapeutic goods">License data</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"> <ul><li><small><abbr class="country-name" title="United States">US</abbr></small>&#160;<a href="/wiki/DailyMed" title="DailyMed">DailyMed</a>:&#160;<span title="dailymed.nlm.nih.gov"><a rel="nofollow" class="external text" href="https://dailymed.nlm.nih.gov/dailymed/search.cfm?labeltype=all&amp;query=Naltrexone">Naltrexone</a></span></li></ul></div> </td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Pregnancy_category" title="Pregnancy category">Pregnancy<br />category</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"> <ul><li><small><abbr class="country-name" title="Australia">AU</abbr>:</small>&#x20;B3</li> <li class="mw-empty-elt"></li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Route_of_administration" title="Route of administration">Routes of<br />administration</a></th><td class="infobox-data"><a href="/wiki/Oral_administration" title="Oral administration">By mouth</a>, <a href="/wiki/Intramuscular_injection" title="Intramuscular injection">intramuscular</a>, <a href="/wiki/Subcutaneous_implant" title="Subcutaneous implant">subcutaneous implant</a></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Anatomical_Therapeutic_Chemical_Classification_System" title="Anatomical Therapeutic Chemical Classification System">ATC code</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><a href="/wiki/ATC_code_N07" title="ATC code N07">N07BB04</a>&#x20;(<span title="www.whocc.no"><a rel="nofollow" class="external text" href="https://www.whocc.no/atc_ddd_index/?code=N07BB04">WHO</a></span>)&#x20;</li></ul></div></td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd;color:inherit;">Legal status</th></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Regulation_of_therapeutic_goods" title="Regulation of therapeutic goods">Legal status</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"> <ul><li><small><abbr class="country-name" title="Australia">AU</abbr>:</small>&#x20;<a href="/wiki/Standard_for_the_Uniform_Scheduling_of_Medicines_and_Poisons#Schedule_4" title="Standard for the Uniform Scheduling of Medicines and Poisons">S4</a> (Prescription only)<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup></li> <li><small><abbr class="country-name" title="Brazil">BR</abbr>:</small>&#x20;<a href="/wiki/Brazilian_Controlled_Drugs_and_Substances_Act#Class_C1" title="Brazilian Controlled Drugs and Substances Act">Class C1</a> (Other controlled substances)<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup></li> <li><small><abbr class="country-name" title="Canada">CA</abbr></small>:&#x20;<a href="/wiki/Prescription_drug" title="Prescription drug"> ℞-only</a></li> <li><small><abbr class="country-name" title="United Kingdom">UK</abbr>:</small>&#x20;<a href="/wiki/Prescription_drug" title="Prescription drug">POM</a> (Prescription only)</li> <li><small><abbr class="country-name" title="United States">US</abbr>:</small>&#x20;<a href="/wiki/Prescription_drug" title="Prescription drug">℞-only</a><sup id="cite_ref-ReviaLabel_3-0" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ContraveLabel_4-0" class="reference"><a href="#cite_note-ContraveLabel-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-VivitrolLabel_5-0" class="reference"><a href="#cite_note-VivitrolLabel-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup></li> <li>In&#160;general: ℞&#160;(Prescription only)</li></ul></div> </td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd;color:inherit;"><a href="/wiki/Pharmacokinetics" title="Pharmacokinetics">Pharmacokinetic</a> data</th></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Bioavailability" title="Bioavailability">Bioavailability</a></th><td class="infobox-data">5–60%<sup id="cite_ref-pmid2836152_6-0" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19537999_7-0" class="reference"><a href="#cite_note-pmid19537999-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Plasma_protein_binding" title="Plasma protein binding">Protein binding</a></th><td class="infobox-data">20%<sup id="cite_ref-pmid2836152_6-1" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ReviaLabel_3-1" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Drug_metabolism" title="Drug metabolism">Metabolism</a></th><td class="infobox-data"><a href="/wiki/Liver" title="Liver">Liver</a> (non-<a href="/wiki/Cytochrome_P450" title="Cytochrome P450">CYP450</a>)<sup id="cite_ref-SevarinoKosten2009_11-0" class="reference"><a href="#cite_note-SevarinoKosten2009-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Metabolite" title="Metabolite">Metabolites</a></th><td class="infobox-data"><a href="/wiki/6%CE%B2-Naltrexol" title="6β-Naltrexol">6β-Naltrexol</a>, others<sup id="cite_ref-pmid2836152_6-2" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Onset_of_action" title="Onset of action">Onset of action</a></th><td class="infobox-data">30 minutes<sup id="cite_ref-AHFS2017_8-0" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Biological_half-life" title="Biological half-life">Elimination <span class="nowrap">half-life</span></a></th><td class="infobox-data">Oral (Revia):<sup id="cite_ref-ReviaLabel_3-2" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><br />• Naltrexone: 4 hours<br />• <a href="/wiki/6%CE%B2-Naltrexol" title="6β-Naltrexol">6β-Naltrexol</a>: 13 hours<br />Oral (Contrave):<sup id="cite_ref-ContraveLabel_4-1" class="reference"><a href="#cite_note-ContraveLabel-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><br />• Naltrexone: 5 hours<br /><a href="/wiki/Intramuscular_injection" title="Intramuscular injection"><abbr title="Intramuscular injection">IM</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip Intramuscular injection</span> (Vivitrol):<sup id="cite_ref-VivitrolLabel_5-1" class="reference"><a href="#cite_note-VivitrolLabel-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><br />• Naltrexone: 5–10 days<br />• 6β-Naltrexol: 5–10 days</td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Pharmacodynamics#Duration_of_action" title="Pharmacodynamics">Duration of action</a></th><td class="infobox-data">&gt;72 hours<sup id="cite_ref-pmid2836152_6-3" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-0" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-0" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Excretion" title="Excretion">Excretion</a></th><td class="infobox-data"><a href="/wiki/Urine" title="Urine">Urine</a><sup id="cite_ref-ReviaLabel_3-3" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd;color:inherit;">Identifiers</th></tr><tr><td colspan="2" class="infobox-full-data"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold;"><div><a href="/wiki/IUPAC_nomenclature_of_chemistry" title="IUPAC nomenclature of chemistry">IUPAC name</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all; text-align:left; padding-left:1.5em; text-indent:-1.5em;"><li style="line-height: inherit; margin: 0"><div style="font-size: 97%;">(4R,4aS,7aR,12bS)-3-(cyclopropylmethyl)-4a,9-dihydroxy-2,4,5,6,7a,13-hexahydro-1<i>H</i>-4,12-methanobenzofuro[3,2-e]isoquinoline-7-one</div></li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/CAS_Registry_Number" title="CAS Registry Number">CAS Number</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="commonchemistry.cas.org"><a rel="nofollow" class="external text" href="https://commonchemistry.cas.org/detail?cas_rn=16590-41-3">16590-41-3</a></span><sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/PubChem#CID" title="PubChem">PubChem</a> <span style="font-weight:normal"><abbr title="Compound ID">CID</abbr></span></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="pubchem.ncbi.nlm.nih.gov"><a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/5360515">5360515</a></span></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Guide_to_Pharmacology" title="Guide to Pharmacology">IUPHAR/BPS</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="www.guidetopharmacology.org"><a rel="nofollow" class="external text" href="https://www.guidetopharmacology.org/GRAC/LigandDisplayForward?ligandId=1639">1639</a></span></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/DrugBank" title="DrugBank">DrugBank</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="www.drugbank.ca"><a rel="nofollow" class="external text" href="https://www.drugbank.ca/drugs/DB00704">DB00704</a></span><sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/ChemSpider" title="ChemSpider">ChemSpider</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="www.chemspider.com"><a rel="nofollow" class="external text" href="https://www.chemspider.com/Chemical-Structure.4514524.html">4514524</a></span><sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Unique_Ingredient_Identifier" title="Unique Ingredient Identifier">UNII</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="precision.fda.gov"><a rel="nofollow" class="external text" href="https://precision.fda.gov/uniisearch/srs/unii/5S6W795CQM">5S6W795CQM</a></span></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/KEGG" title="KEGG">KEGG</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="www.kegg.jp"><a rel="nofollow" class="external text" href="https://www.kegg.jp/entry/D05113">D05113</a></span><sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/ChEBI" title="ChEBI">ChEBI</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="www.ebi.ac.uk"><a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:7465">CHEBI:7465</a></span><sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/ChEMBL" title="ChEMBL">ChEMBL</a></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="www.ebi.ac.uk"><a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/chembl/explore/compound/ChEMBL19019">ChEMBL19019</a></span><sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/CompTox_Chemicals_Dashboard" title="CompTox Chemicals Dashboard">CompTox Dashboard</a> <span style="font-weight:normal">(<abbr title="U.S. Environmental Protection Agency">EPA</abbr>)</span></th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="comptox.epa.gov"><a rel="nofollow" class="external text" href="https://comptox.epa.gov/dashboard/chemical/details/DTXSID4046313">DTXSID4046313</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q409587#P3117" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/ECHA_InfoCard" class="mw-redirect" title="ECHA InfoCard"><span title="echa.europa.eu">ECHA InfoCard</span></a></th><td class="infobox-data"><a rel="nofollow" class="external text" href="https://echa.europa.eu/substance-information/-/substanceinfo/100.036.939">100.036.939</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q409587#P2566" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd;color:inherit;">Chemical and physical data</th></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Chemical_formula" title="Chemical formula">Formula</a></th><td class="infobox-data"><span title="Carbon">C</span><sub>20</sub><span title="Hydrogen">H</span><sub>23</sub><span title="Nitrogen">N</span><span title="Oxygen">O</span><sub>4</sub></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Molar_mass" title="Molar mass">Molar mass</a></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7002341407000000000♠"></span>341.407</span>&#160;g·mol<sup>−1</sup></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;">3D model (<a href="/wiki/JSmol" class="mw-redirect" title="JSmol">JSmol</a>)</th><td class="infobox-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist"><ul><li><span title="chemapps.stolaf.edu (3D interactive model)"><a rel="nofollow" class="external text" href="https://chemapps.stolaf.edu/jmol/jmol.php?model=O%3DC4%5BC%40%40H%5D5Oc1c2c%28ccc1O%29C%5BC%40H%5D3N%28CC%5BC%40%5D25%5BC%40%40%5D3%28O%29CC4%29CC6CC6">Interactive image</a></span></li></ul></div></td></tr><tr><th scope="row" class="infobox-label" style="line-height:1.2em;"><a href="/wiki/Melting_point" title="Melting point">Melting point</a></th><td class="infobox-data">169&#160;°C (336&#160;°F)</td></tr><tr><td colspan="2" class="infobox-full-data"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold;"><div><a href="/wiki/Simplified_molecular-input_line-entry_system" class="mw-redirect" title="Simplified molecular-input line-entry system">SMILES</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all;"><li style="line-height: inherit; margin: 0"><div style="word-wrap:break-word; text-indent:-1.5em; text-align:left; padding-left:1.5em; font-size:97%; line-height:120%;">O=C4[C@@H]5Oc1c2c(ccc1O)C[C@H]3N(CC[C@]25[C@@]3(O)CC4)CC6CC6</div></li></ul> </div></td></tr><tr><td colspan="2" class="infobox-full-data"><div class="collapsible-list mw-collapsible mw-collapsed" style="text-align: left;"> <div style="line-height: 1.6em; font-weight: bold;"><div><a href="/wiki/International_Chemical_Identifier" title="International Chemical Identifier">InChI</a></div></div> <ul class="mw-collapsible-content" style="margin-top: 0; margin-bottom: 0; line-height: inherit; list-style: none; margin-left: 0; word-break:break-all;"><li style="line-height: inherit; margin: 0"><div style="word-wrap:break-word; text-indent:-1.5em; text-align:left; padding-left:1.5em; font-size:97%; line-height:120%;">InChI=1S/C20H23NO4/c22-13-4-3-12-9-15-20(24)6-5-14(23)18-19(20,16(12)17(13)25-18)7-8-21(15)10-11-1-2-11/h3-4,11,15,18,22,24H,1-2,5-10H2/t15-,18+,19+,20-/m1/s1<sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></div></li><li style="line-height: inherit; margin: 0"><div style="word-wrap:break-word; text-indent:-1.5em; text-align:left; padding-left:1.5em; font-size:97%; line-height:120%;">Key:DQCKKXVULJGBQN-XFWGSAIBSA-N<sup>&#160;<span typeof="mw:File"><span><img alt="check" src="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/7px-Yes_check.svg.png" decoding="async" width="7" height="7" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/11px-Yes_check.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/fb/Yes_check.svg/14px-Yes_check.svg.png 2x" data-file-width="600" data-file-height="600" /></span></span><span style="display:none">Y</span></sup></div></li></ul> </div></td></tr><tr><td colspan="2" class="infobox-below"><style data-mw-deduplicate="TemplateStyles:r886047488">.mw-parser-output .nobold{font-weight:normal}</style><span class="nobold">&#160;&#160;<span class="reflink plainlinks nourlexpansion"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Special:ComparePages&amp;rev1=464372546&amp;page2=Naltrexone">(verify)</a></span></span></td></tr></tbody></table> <p><b>Naltrexone</b>, sold under the brand name <b>Revia</b> among others, is a <a href="/wiki/Medication" title="Medication">medication</a> primarily used to manage <a href="/wiki/Alcohol_use_disorder" class="mw-redirect" title="Alcohol use disorder">alcohol use</a> or <a href="/wiki/Opioid_use_disorder" title="Opioid use disorder">opioid use disorder</a> by reducing <a href="/wiki/Craving_(withdrawal)" class="mw-redirect" title="Craving (withdrawal)">cravings</a> and feelings of <a href="/wiki/Euphoria" title="Euphoria">euphoria</a> associated with <a href="/wiki/Substance_use_disorder" title="Substance use disorder">substance use disorder</a>.<sup id="cite_ref-AHFS2017_8-1" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> It has also been found effective in the treatment of other <a href="/wiki/Addiction" title="Addiction">addictions</a> and may be used for them <a href="/wiki/Off-label_use" title="Off-label use">off-label</a>.<sup id="cite_ref-pmid27401883_12-0" class="reference"><a href="#cite_note-pmid27401883-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> An opioid-dependent person should not receive naltrexone before <a href="/wiki/Drug_detoxification" title="Drug detoxification">detoxification</a>.<sup id="cite_ref-AHFS2017_8-2" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> It is taken <a href="/wiki/Oral_administration" title="Oral administration">orally</a> or by <a href="/wiki/Intramuscular" class="mw-redirect" title="Intramuscular">injection into a muscle</a>.<sup id="cite_ref-AHFS2017_8-3" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> Effects begin within 30 minutes,<sup id="cite_ref-AHFS2017_8-4" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> though a decreased desire for opioids may take a few weeks to occur.<sup id="cite_ref-AHFS2017_8-5" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> </p><p>Side effects may include <a href="/wiki/Trouble_sleeping" class="mw-redirect" title="Trouble sleeping">trouble sleeping</a>, <a href="/wiki/Anxiety" title="Anxiety">anxiety</a>, <a href="/wiki/Nausea" title="Nausea">nausea</a>, and <a href="/wiki/Headache" title="Headache">headaches</a>.<sup id="cite_ref-AHFS2017_8-6" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> In those still on opioids, <a href="/wiki/Opioid_withdrawal" title="Opioid withdrawal">opioid withdrawal</a> may occur.<sup id="cite_ref-AHFS2017_8-7" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> Use is not recommended in people with <a href="/wiki/Liver_failure" title="Liver failure">liver failure</a>.<sup id="cite_ref-AHFS2017_8-8" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> It is unclear if use is safe during <a href="/wiki/Pregnancy" title="Pregnancy">pregnancy</a>.<sup id="cite_ref-AHFS2017_8-9" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> Naltrexone is an <a href="/wiki/Opioid_antagonist" title="Opioid antagonist">opioid antagonist</a> and works by blocking the effects of <a href="/wiki/Opioid" title="Opioid">opioids</a>, including both opioid drugs as well as <a href="/wiki/Endorphins" title="Endorphins">opioids naturally produced in the brain</a>.<sup id="cite_ref-AHFS2017_8-10" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> </p><p>Naltrexone was first made in 1965 and was approved for medical use in the United States in 1984.<sup id="cite_ref-AHFS2017_8-11" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Sad2012_14-0" class="reference"><a href="#cite_note-Sad2012-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> Naltrexone, as <a href="/wiki/Naltrexone/bupropion" title="Naltrexone/bupropion">naltrexone/bupropion</a> (brand name Contrave), is also used to treat <a href="/wiki/Obesity" title="Obesity">obesity</a>.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> It is on the <a href="/wiki/WHO_Model_List_of_Essential_Medicines" title="WHO Model List of Essential Medicines">World Health Organization's List of Essential Medicines</a>.<sup id="cite_ref-WHO23rd_16-0" class="reference"><a href="#cite_note-WHO23rd-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup> In 2021, it was the 254th most commonly prescribed medication in the United States, with more than 1<span class="nowrap">&#160;</span>million prescriptions.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> </p> <style data-mw-deduplicate="TemplateStyles:r886046785">.mw-parser-output .toclimit-2 .toclevel-1 ul,.mw-parser-output .toclimit-3 .toclevel-2 ul,.mw-parser-output .toclimit-4 .toclevel-3 ul,.mw-parser-output .toclimit-5 .toclevel-4 ul,.mw-parser-output .toclimit-6 .toclevel-5 ul,.mw-parser-output .toclimit-7 .toclevel-6 ul{display:none}</style><div class="toclimit-3"><meta property="mw:PageProp/toc" /></div> <div class="mw-heading mw-heading2"><h2 id="Medical_uses">Medical uses</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=1" title="Edit section: Medical uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Alcohol_use_disorder">Alcohol use disorder</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=2" title="Edit section: Alcohol use disorder"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone has been best studied as a treatment for <a href="/wiki/Alcoholism" title="Alcoholism">alcoholism</a>.<sup id="cite_ref-pmid27401883_12-1" class="reference"><a href="#cite_note-pmid27401883-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Naltrexone has been shown to decrease the quantity and frequency of <a href="/wiki/Ethanol" title="Ethanol">ethanol</a> consumption by reducing the dopamine release from the brain after consuming alcohol.<sup id="cite_ref-Spencer_2023_19-0" class="reference"><a href="#cite_note-Spencer_2023-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Ros2010_21-0" class="reference"><a href="#cite_note-Ros2010-21"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> It does not appear to change the percentage of people drinking.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> Its overall benefit has been described as "modest".<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Spencer_2023_19-1" class="reference"><a href="#cite_note-Spencer_2023-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Clinical_and_biological_moderators_24-0" class="reference"><a href="#cite_note-Clinical_and_biological_moderators-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid20201811_25-0" class="reference"><a href="#cite_note-pmid20201811-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Acamprosate" title="Acamprosate">Acamprosate</a> may work better than naltrexone for eliminating alcohol abuse, while naltrexone may decrease the desire for <a href="/wiki/Alcohol_(drug)" title="Alcohol (drug)">alcohol</a> to a greater extent.<sup id="cite_ref-Mai2013_26-0" class="reference"><a href="#cite_note-Mai2013-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> </p><p>A method pioneered by scientist John David Sinclair (dubbed commercially the “Sinclair Method”) advocates for “pharmacological extinction” of problem drinking behavior by administering naltrexone alongside controlled alcohol consumption. In effect, he argues that naltrexone-induced opioid antagonism sufficiently disrupts reflexive reward mechanisms inherent in the consumption of alcohol and, given enough repetition, will dissociate positive associations formerly made with the consumption of alcohol. The Sinclair Method has a clinically proven success rate of 78%.<sup id="cite_ref-Sin2001_27-0" class="reference"><a href="#cite_note-Sin2001-27"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Opioid_use_disorder">Opioid use disorder</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=3" title="Edit section: Opioid use disorder"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Long-acting injectable naltrexone (under the brand name <b>Vivitrol</b>) is an <a href="/wiki/Opioid_antagonist" title="Opioid antagonist">opioid antagonist</a>, blocking the effects of <a href="/wiki/Heroin" title="Heroin">heroin</a> and other <a href="/wiki/Opioid" title="Opioid">opioids</a>, and decreases heroin use compared to a placebo.<sup id="cite_ref-Shar2017_28-0" class="reference"><a href="#cite_note-Shar2017-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> Unlike <a href="/wiki/Methadone" title="Methadone">methadone</a> and <a href="/wiki/Buprenorphine" title="Buprenorphine">buprenorphine</a>, it is not a controlled medication.<sup id="cite_ref-Shar2017_28-1" class="reference"><a href="#cite_note-Shar2017-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> It may decrease cravings for opioids after a number of weeks, and decreases the risk of <a href="/wiki/Overdose" class="mw-redirect" title="Overdose">overdose</a>, at least during the time period that naltrexone is still active, though concern about risk of overdose for those stopping treatment remains.<sup id="cite_ref-AHFS2017_8-12" class="reference"><a href="#cite_note-AHFS2017-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Wakeman_2020_30-0" class="reference"><a href="#cite_note-Wakeman_2020-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> It is given once per month and has better <a href="/wiki/Compliance_(medicine)" class="mw-redirect" title="Compliance (medicine)">compliance</a> and effect for opioid use than the oral formulation.<sup id="cite_ref-ComerSullivan2006_31-0" class="reference"><a href="#cite_note-ComerSullivan2006-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> </p><p>A drawback of injectable naltrexone is that it requires patients with opioid use disorder and current physiological dependence to be fully withdrawn before it is initiated to avoid a precipitated <a href="/wiki/Opioid_withdrawal" title="Opioid withdrawal">opioid withdrawal</a> that may be quite severe. In contrast, initiation of buprenorphine only requires delay of the first dose until the patient begins to manifest at least mild opioid withdrawal symptoms.<sup id="cite_ref-pmid31062259_32-0" class="reference"><a href="#cite_note-pmid31062259-32"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup> Among patients able to successfully initiate injectable naltrexone, long-term remission rates were similar to those seen in clinical buprenorphine/naloxone administration.<sup id="cite_ref-Comparative_effectiveness_of_extend_33-0" class="reference"><a href="#cite_note-Comparative_effectiveness_of_extend-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> </p><p>The consequence of relapse when weighing the best course of treatment for opiate use disorder remains a concern. Methadone and buprenorphine administration maintain greater <a href="/wiki/Drug_tolerance" title="Drug tolerance">drug tolerance</a> while naltrexone allows tolerance to fade, leading to higher instances of an overdose in people who relapse and thus higher <a href="/wiki/Mortality_rate" title="Mortality rate">mortality</a>. <a href="/wiki/World_Health_Organization" title="World Health Organization">World Health Organization</a> guidelines state that most patients should be advised to use opioid agonists (e.g., methadone or buprenorphine) rather than opioid antagonists like naltrexone, citing evidence of superiority in reducing mortality and retaining patients in care.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> </p><p>A 2011 review found insufficient evidence to determine the effect of naltrexone taken orally on opioid dependence.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup> While some do well with this formulation, it must be taken daily, and a person whose cravings become overwhelming can obtain opioid intoxication simply by skipping a dose. Due to this issue, the usefulness of oral naltrexone in <a href="/wiki/Opioid_use_disorder" title="Opioid use disorder">opioid use disorder</a> is limited by the low retention in treatment. Naltrexone taken orally remains an ideal treatment for a small number of people with opioid use, usually those with a stable social situation and motivation. With additional <a href="/wiki/Contingency_management" title="Contingency management">contingency management</a> support, naltrexone may be effective in a broader population.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Others">Others</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=4" title="Edit section: Others"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Unlike <a href="/wiki/Varenicline" title="Varenicline">varenicline</a> (brand name Chantix), naltrexone is not useful for <a href="/wiki/Smoking_cessation" title="Smoking cessation">quitting smoking</a>.<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> Naltrexone has also been under investigation for reducing <a href="/wiki/Behavioral_addiction" title="Behavioral addiction">behavioral addictions</a> such as gambling, <a href="/wiki/Self-harm" title="Self-harm">NSSID</a> (non-suicidal self-injury disorder), and <a href="/wiki/Kleptomania" title="Kleptomania">kleptomania</a>, as well as compulsive sexual behaviors in both offenders and non-offenders (e.g. compulsive porn viewing and masturbation). The results were promising. In one study, the majority of sexual offenders reported a strong reduction in sexual urges and fantasies which reverted to baseline once the medication was discontinued. Case reports have also shown cessation of gambling and other compulsive behaviors, for as long as the medication was taken.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup> </p><p>When taken at much smaller doses, a regimen known as <a href="/wiki/Low-dose_naltrexone" title="Low-dose naltrexone">low-dose naltrexone</a> (LDN), naltrexone may reduce pain and help to address neurological symptoms. Some patients report that LDN helps reduce their symptoms of <a href="/wiki/Chronic_fatigue_syndrome" class="mw-redirect" title="Chronic fatigue syndrome">ME/CFS</a>, <a href="/wiki/Multiple_sclerosis" title="Multiple sclerosis">multiple sclerosis</a> (MS), <a href="/wiki/Fibromyalgia" title="Fibromyalgia">fibromyalgia</a>, or autoimmune diseases. Although its mechanism of action is unclear, some have speculated that it may act as an anti-inflammatory.<sup id="cite_ref-Low_dose_naltrexone_-_MEpedia_40-0" class="reference"><a href="#cite_note-Low_dose_naltrexone_-_MEpedia-40"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> LDN is also being considered as a potential treatment for <a href="/wiki/Long_COVID" title="Long COVID">long COVID</a>.<sup id="cite_ref-Safety_and_efficacy_of_low_dose_nal_41-0" class="reference"><a href="#cite_note-Safety_and_efficacy_of_low_dose_nal-41"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Available_forms">Available forms</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=5" title="Edit section: Available forms"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Bupropion/naltrexone" class="mw-redirect" title="Bupropion/naltrexone">Bupropion/naltrexone</a>, <a href="/wiki/Morphine/naltrexone" title="Morphine/naltrexone">Morphine/naltrexone</a>, and <a href="/wiki/Buprenorphine/naltrexone" title="Buprenorphine/naltrexone">Buprenorphine/naltrexone</a></div> <p>Naltrexone is available and most commonly used in the form of an <a href="/wiki/Oral_administration" title="Oral administration">oral</a> <a href="/wiki/Tablet_(pharmacy)" title="Tablet (pharmacy)">tablet</a> (50&#160;mg).<sup id="cite_ref-Milhorn2017_42-0" class="reference"><a href="#cite_note-Milhorn2017-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup> Vivitrol, a naltrexone formulation for <a href="/wiki/Depot_injection" title="Depot injection">depot injection</a> containing 380&#160;mg of the medication per vial, is also available.<sup id="cite_ref-Milhorn2017_42-1" class="reference"><a href="#cite_note-Milhorn2017-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-MedicalNewsToday2006_43-0" class="reference"><a href="#cite_note-MedicalNewsToday2006-43"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Additionally, naltrexone <a href="/wiki/Subcutaneous_implant" title="Subcutaneous implant">subcutaneous implants</a> that are surgically implanted are available.<sup id="cite_ref-TGA_44-0" class="reference"><a href="#cite_note-TGA-44"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup> While these are manufactured in Australia, they are not authorized for use within Australia, but only for export.<sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup> By 2009, naltrexone implants showed superior efficacy in the treatment of heroin dependence when compared to the oral form.<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">&#91;</span>46<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Contraindications">Contraindications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=6" title="Edit section: Contraindications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone should not be used by persons with acute hepatitis or liver failure, or those with recent opioid use (typically 7–10 days). </p> <div class="mw-heading mw-heading2"><h2 id="Side_effects">Side effects</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=7" title="Edit section: Side effects"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The most common side effects reported with naltrexone are <a href="/wiki/Gastrointestinal" class="mw-redirect" title="Gastrointestinal">gastrointestinal</a> complaints such as <a href="/wiki/Diarrhea" title="Diarrhea">diarrhea</a> and <a href="/wiki/Abdominal_cramping" class="mw-redirect" title="Abdominal cramping">abdominal cramping</a>.<sup id="cite_ref-ReviaLabel_3-4" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> These adverse effects are analogous to the symptoms of <a href="/wiki/Opioid_withdrawal" title="Opioid withdrawal">opioid withdrawal</a>, as the <a href="/wiki/%CE%9C-opioid_receptor" title="Μ-opioid receptor">μ-opioid receptor</a> blockade will increase <a href="/wiki/Gastrointestinal_motility" class="mw-redirect" title="Gastrointestinal motility">gastrointestinal motility</a>. </p><p>The side effects of naltrexone by incidence are as follows:<sup id="cite_ref-ReviaLabel_3-5" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> </p> <ul><li>Greater than 10%: <a href="/wiki/Difficulty_sleeping" class="mw-redirect" title="Difficulty sleeping">difficulty sleeping</a>, <a href="/wiki/Anxiety" title="Anxiety">anxiety</a>, <a href="https://en.wiktionary.org/wiki/nervousness" class="extiw" title="wikt:nervousness">nervousness</a>, <a href="/wiki/Abdominal_pain" title="Abdominal pain">abdominal pain</a>/<a href="/wiki/Abdominal_cramp" class="mw-redirect" title="Abdominal cramp">cramps</a>, <a href="/wiki/Nausea" title="Nausea">nausea</a> and/or <a href="/wiki/Vomiting" title="Vomiting">vomiting</a>, <a href="/wiki/Low_energy" class="mw-redirect" title="Low energy">low energy</a>, <a href="/wiki/Joint_pain" class="mw-redirect" title="Joint pain">joint</a>/<a href="/wiki/Muscle_pain" class="mw-redirect" title="Muscle pain">muscle pain</a>, and <a href="/wiki/Headache" title="Headache">headache</a>.<sup id="cite_ref-ReviaLabel_3-6" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></li> <li>Less than 10%: <a href="/wiki/Loss_of_appetite" class="mw-redirect" title="Loss of appetite">loss of appetite</a>, <a href="/wiki/Diarrhea" title="Diarrhea">diarrhea</a>, <a href="/wiki/Constipation" title="Constipation">constipation</a>, <a href="/wiki/Thirst" title="Thirst">thirstiness</a>, increased energy, <a href="/wiki/Low_mood" class="mw-redirect" title="Low mood">feeling down</a>, <a href="/wiki/Irritability" title="Irritability">irritability</a>, <a href="/wiki/Dizziness" title="Dizziness">dizziness</a>, <a href="/wiki/Skin_rash" class="mw-redirect" title="Skin rash">skin rash</a>, <a href="/wiki/Delayed_ejaculation" title="Delayed ejaculation">delayed ejaculation</a>, <a href="/wiki/Erectile_dysfunction" title="Erectile dysfunction">erectile dysfunction</a>, and <a href="/wiki/Chills" title="Chills">chills</a>.<sup id="cite_ref-ReviaLabel_3-7" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></li> <li>A variety of other adverse events have also been reported with less than 1% incidence.<sup id="cite_ref-ReviaLabel_3-8" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="Opioid_withdrawal">Opioid withdrawal</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=8" title="Edit section: Opioid withdrawal"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone should not be started until several (typically 7–10) days of abstinence from opioids have been achieved. This is due to the risk of acute <a href="/wiki/Opioid_withdrawal" title="Opioid withdrawal">opioid withdrawal</a> if naltrexone is taken, as naltrexone will displace most opioids from their receptors. The time of abstinence may be shorter than 7 days, depending on the half-life of the specific opioid taken. Some physicians use a <a href="/wiki/Naloxone" title="Naloxone">naloxone</a> challenge to determine whether an individual has any opioids remaining. The challenge involves giving a test dose of naloxone and monitoring for opioid withdrawal. If withdrawal occurs, naltrexone should not be started.<sup id="cite_ref-galanter_47-0" class="reference"><a href="#cite_note-galanter-47"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Adverse_effects">Adverse effects</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=9" title="Edit section: Adverse effects"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Whether naltrexone causes <a href="/wiki/Dysphoria" title="Dysphoria">dysphoria</a>, <a href="/wiki/Depression_(mood)" title="Depression (mood)">depression</a>, <a href="/wiki/Anhedonia" title="Anhedonia">anhedonia</a>, or other aversive effects has been studied and reviewed.<sup id="cite_ref-pmid12028745_48-0" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-StrainStitzer2006_49-0" class="reference"><a href="#cite_note-StrainStitzer2006-49"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid21951371_50-0" class="reference"><a href="#cite_note-pmid21951371-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid27436632_51-0" class="reference"><a href="#cite_note-pmid27436632-51"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> In early studies of normal and opioid-abstinent individuals, acute and short-term administration of naltrexone was reported to produce a variety of <a href="/wiki/Aversive" class="mw-redirect" title="Aversive">aversive</a> effects including <a href="/wiki/Fatigue_(medical)" class="mw-redirect" title="Fatigue (medical)">fatigue</a>, loss of energy, <a href="/wiki/Sleepiness" class="mw-redirect" title="Sleepiness">sleepiness</a>, mild <a href="/wiki/Dysphoria" title="Dysphoria">dysphoria</a>, <a href="/wiki/Depression_(mood)" title="Depression (mood)">depression</a>, <a href="/wiki/Lightheadedness" title="Lightheadedness">lightheadedness</a>, <a href="/wiki/Faintness" class="mw-redirect" title="Faintness">faintness</a>, <a href="/wiki/Confusion" title="Confusion">confusion</a>, <a href="/wiki/Nausea" title="Nausea">nausea</a>, <a href="/wiki/Gastrointestinal_disturbance" class="mw-redirect" title="Gastrointestinal disturbance">gastrointestinal disturbances</a>, <a href="/wiki/Sweating" class="mw-redirect" title="Sweating">sweating</a>, and occasional <a href="/wiki/Derealization" title="Derealization">derealization</a>.<sup id="cite_ref-pmid21951371_50-1" class="reference"><a href="#cite_note-pmid21951371-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid219434_52-0" class="reference"><a href="#cite_note-pmid219434-52"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid7297411_53-0" class="reference"><a href="#cite_note-pmid7297411-53"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2992300_54-0" class="reference"><a href="#cite_note-pmid2992300-54"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid3593812_55-0" class="reference"><a href="#cite_note-pmid3593812-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> However, these studies were small, often uncontrolled, and used subjective means of assessing side effects.<sup id="cite_ref-pmid3593812_55-1" class="reference"><a href="#cite_note-pmid3593812-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid12028745_48-1" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> Most subsequent longer-term studies of naltrexone for indications like alcohol or opioid dependence have not reported dysphoria or depression with naltrexone in most individuals.<sup id="cite_ref-pmid21951371_50-2" class="reference"><a href="#cite_note-pmid21951371-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17110818_56-0" class="reference"><a href="#cite_note-pmid17110818-56"><span class="cite-bracket">&#91;</span>56<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid3593812_55-2" class="reference"><a href="#cite_note-pmid3593812-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> According to one source:<sup id="cite_ref-StrainStitzer2006_49-1" class="reference"><a href="#cite_note-StrainStitzer2006-49"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> </p> <dl><dd>Naltrexone itself produces little or no psychoactive effect in normal research volunteers even at high doses, which is remarkable given that the endogenous opioid system is important in normal hedonic functioning. Because endogenous opioids are involved in the brain reward system, it would be reasonable to hypothesize that naltrexone might produce anhedonic or dysphoric effects. Although some evidence from small, early trials suggested that patients with a history of opiate dependence might be susceptible to dysphoric effects in response to naltrexone (Crowley et al. 1985; Hollister et al. 1981), reports of such effects have been inconsistent. Most large clinical studies of recovering opioid-dependent individuals have not found naltrexone to have an adverse effect on mood (Greenstein et al. 1984; Malcolm et al. 1987; Miotto et al. 2002; Shufman et al. 1994). Some studies have actually found improvements in mood during the course of treatment with naltrexone (Miotto et al. 1997; Rawlins and Randall 1976).</dd></dl> <p>Based on available evidence, naltrexone seems to have minimal untoward effects in the aforementioned areas, at least with long-term therapy.<sup id="cite_ref-pmid12028745_48-2" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-StrainStitzer2006_49-2" class="reference"><a href="#cite_note-StrainStitzer2006-49"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid21951371_50-3" class="reference"><a href="#cite_note-pmid21951371-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid27436632_51-1" class="reference"><a href="#cite_note-pmid27436632-51"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> It has been suggested that differences in findings between acute and longer-term studies of naltrexone treatment might be related to altered function in the opioid system with chronic administration of naltrexone.<sup id="cite_ref-pmid21951371_50-4" class="reference"><a href="#cite_note-pmid21951371-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid12028745_48-3" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> For example, marked <a href="/wiki/Receptor_upregulation" class="mw-redirect" title="Receptor upregulation">upregulation</a> of opioid receptors and hyper-sensitivity to opioids have been observed with naltrexone in <a href="/wiki/Preclinical_research" class="mw-redirect" title="Preclinical research">preclinical studies</a>.<sup id="cite_ref-pmid2836152_6-4" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid12028745_48-4" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid21768981_57-0" class="reference"><a href="#cite_note-pmid21768981-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> Another possibility is that the central opioid system may have low endogenous functionality in most individuals, becoming active only in the presence of exogenously administered opioid receptor agonists or with stimulation by endogenous opioids induced by <a href="/wiki/Pain" title="Pain">pain</a> or <a href="/wiki/Psychological_stress" title="Psychological stress">stress</a>.<sup id="cite_ref-pmid21768981_57-1" class="reference"><a href="#cite_note-pmid21768981-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> A third possibility is that normal individuals may experience different side effects with naltrexone than people with addictive disease such as alcohol or opioid dependence, who may have altered opioid tone or responsiveness.<sup id="cite_ref-pmid12028745_48-5" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid21768981_57-2" class="reference"><a href="#cite_note-pmid21768981-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> It is notable in this regard that most studies of naltrexone have been in people with substance dependence.<sup id="cite_ref-pmid12028745_48-6" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> </p><p>Naltrexone may also initially produce <a href="/wiki/Opioid_withdrawal" title="Opioid withdrawal">opioid withdrawal</a>-like symptoms in a small subset of people not dependent on opioids:<sup id="cite_ref-pmid8742771_58-0" class="reference"><a href="#cite_note-pmid8742771-58"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> </p> <dl><dd>The side-effect profile [of naltrexone], at least on the recommended dose of 50 mg per day, is generally benign, although 5 to 10 percent of detoxified opioid addicts experience immediate, intolerable levels of withdrawal-like effects including agitation, anxiety, insomnia, light-headedness, sweating, dysphoria, and nausea. Most patients on naltrexone experience few or no symptoms after the first 1 to 2 weeks of treatment; for a substantial minority (20 to 30 percent) protracted discomfort is experienced.</dd></dl> <p>Persisting affective distress related to naltrexone may account for individuals taking the drug who <a href="/wiki/Drug_discontinuation" class="mw-redirect" title="Drug discontinuation">drop out</a> of treatment.<sup id="cite_ref-pmid30300800_59-0" class="reference"><a href="#cite_note-pmid30300800-59"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid12028745_48-7" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid8742771_58-1" class="reference"><a href="#cite_note-pmid8742771-58"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> </p><p>Naltrexone has been reported to reduce feelings of <a href="/wiki/Social_connection" title="Social connection">social connection</a>.<sup id="cite_ref-pmid31414860_60-0" class="reference"><a href="#cite_note-pmid31414860-60"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid30976797_61-0" class="reference"><a href="#cite_note-pmid30976797-61"><span class="cite-bracket">&#91;</span>61<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid26796966_62-0" class="reference"><a href="#cite_note-pmid26796966-62"><span class="cite-bracket">&#91;</span>62<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid27588701_63-0" class="reference"><a href="#cite_note-pmid27588701-63"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> The μ-opioid receptor has been found to play a major role in social reward in animals and the μ-opioid receptor <a href="/wiki/Knockout_mouse" title="Knockout mouse">knockout mouse</a> is an <a href="/wiki/Animal_model" class="mw-redirect" title="Animal model">animal model</a> of <a href="/wiki/Autism" title="Autism">autism</a>.<sup id="cite_ref-OddiCrusioD&#39;Amato2013_64-0" class="reference"><a href="#cite_note-OddiCrusioD&#39;Amato2013-64"><span class="cite-bracket">&#91;</span>64<span class="cite-bracket">&#93;</span></a></sup> Studies on whether naltrexone can decrease the <a href="/wiki/Pleasure" title="Pleasure">pleasurable</a> effects of listening to <a href="/wiki/Music" title="Music">music</a> are conflicting.<sup id="cite_ref-pmid21314752_65-0" class="reference"><a href="#cite_note-pmid21314752-65"><span class="cite-bracket">&#91;</span>65<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid28176798_66-0" class="reference"><a href="#cite_note-pmid28176798-66"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid33711654_67-0" class="reference"><a href="#cite_note-pmid33711654-67"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> Besides humans, naltrexone has been found to produce aversive effects in rodents as assessed by <a href="/wiki/Conditioned_place_aversion" class="mw-redirect" title="Conditioned place aversion">conditioned place aversion</a>.<sup id="cite_ref-pmid12028745_48-8" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Liver_damage">Liver damage</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=10" title="Edit section: Liver damage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone has been reported to cause <a href="/wiki/Liver_damage" class="mw-redirect" title="Liver damage">liver damage</a> when given at doses higher than recommended.<sup id="cite_ref-pmid20201811_25-1" class="reference"><a href="#cite_note-pmid20201811-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> It carries an FDA boxed warning for this rare side effect. Due to these reports, some physicians may check liver function tests before starting naltrexone, and periodically thereafter. Concerns for liver toxicity initially arose from a study of nonaddicted obese patients receiving 300&#160;mg of naltrexone.<sup id="cite_ref-68" class="reference"><a href="#cite_note-68"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup> Subsequent studies have suggested limited or no toxicity in other patient populations and at typical recommended doses such as 50 to 100&#160;mg/day.<sup id="cite_ref-pmid20201811_25-2" class="reference"><a href="#cite_note-pmid20201811-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid27401883_12-2" class="reference"><a href="#cite_note-pmid27401883-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Overdose">Overdose</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=11" title="Edit section: Overdose"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>No <a href="/wiki/Toxicity" title="Toxicity">toxic</a> effects have been observed with naltrexone in doses of up to 800&#160;mg/day in clinical studies.<sup id="cite_ref-pmid2836152_6-5" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ReviaLabel_3-9" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> The largest reported <a href="/wiki/Overdose" class="mw-redirect" title="Overdose">overdose</a> of naltrexone, which was 1,500&#160;mg in a female patient and was equivalent to an entire bottle of medication (30 × 50&#160;mg tablets), was uneventful.<sup id="cite_ref-pmid22778191_69-0" class="reference"><a href="#cite_note-pmid22778191-69"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup> No deaths are known to have occurred with naltrexone overdose.<sup id="cite_ref-PettinatiDundonCasares_López2013_70-0" class="reference"><a href="#cite_note-PettinatiDundonCasares_López2013-70"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Pharmacology">Pharmacology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=12" title="Edit section: Pharmacology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Pharmacodynamics">Pharmacodynamics</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=13" title="Edit section: Pharmacodynamics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading4"><h4 id="Opioid_receptor_blockade">Opioid receptor blockade</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=14" title="Edit section: Opioid receptor blockade"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable floatright" style="text-align: center;"> <caption>Naltrexone at human opioid receptors </caption> <tbody><tr> <th colspan="3"><a href="/wiki/Binding_affinity" class="mw-redirect" title="Binding affinity">Affinities</a> (<a href="/wiki/Inhibitor_constant" class="mw-redirect" title="Inhibitor constant"><abbr title="Inhibitor constant">K<sub>i</sub></abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip Inhibitor constant</span>)</th> <th>Ratios</th> <th rowspan="2">Refs </th></tr> <tr> <th><a href="/wiki/%CE%9C-Opioid_receptor" class="mw-redirect" title="Μ-Opioid receptor"><abbr title="μ-Opioid receptor">MOR</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip μ-Opioid receptor</span></th> <th><a href="/wiki/%CE%9A-Opioid_receptor" class="mw-redirect" title="Κ-Opioid receptor"><abbr title="κ-Opioid receptor">KOR</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip κ-Opioid receptor</span></th> <th><a href="/wiki/%CE%94-Opioid_receptor" class="mw-redirect" title="Δ-Opioid receptor"><abbr title="δ-Opioid receptor">DOR</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip δ-Opioid receptor</span></th> <th>MOR:KOR:DOR </th></tr> <tr> <td>1.0 nM</td> <td>3.9 nM</td> <td>149 nM</td> <td>1:4:149</td> <td><sup id="cite_ref-pmid8114680_71-0" class="reference"><a href="#cite_note-pmid8114680-71"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td>0.0825 nM</td> <td>0.509 nM</td> <td>8.02 nM</td> <td>1:6:97</td> <td><sup id="cite_ref-pmid7562497_72-0" class="reference"><a href="#cite_note-pmid7562497-72"><span class="cite-bracket">&#91;</span>72<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td>0.2 nM</td> <td>0.4 nM</td> <td>10.8 nM</td> <td>1:2:54</td> <td><sup id="cite_ref-pmid9686407_73-0" class="reference"><a href="#cite_note-pmid9686407-73"><span class="cite-bracket">&#91;</span>73<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid31376930_74-0" class="reference"><a href="#cite_note-pmid31376930-74"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td>0.23 nM</td> <td>0.25 nM</td> <td>38 nM</td> <td>1:1.1:165</td> <td><sup id="cite_ref-pmid17407276_75-0" class="reference"><a href="#cite_note-pmid17407276-75"><span class="cite-bracket">&#91;</span>75<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid21768981_57-3" class="reference"><a href="#cite_note-pmid21768981-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td>0.62 nM</td> <td>1.88 nM</td> <td>12.3 nM</td> <td>1:3:20</td> <td><sup id="cite_ref-pmid23353688_76-0" class="reference"><a href="#cite_note-pmid23353688-76"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid31752279_77-0" class="reference"><a href="#cite_note-pmid31752279-77"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> </td></tr> <tr> <td>0.11 nM</td> <td>0.19 nM</td> <td>60 nM</td> <td>1:1.7:545</td> <td><sup id="cite_ref-pmid15808478_78-0" class="reference"><a href="#cite_note-pmid15808478-78"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19282177_79-0" class="reference"><a href="#cite_note-pmid19282177-79"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Dwoskin2014_80-0" class="reference"><a href="#cite_note-Dwoskin2014-80"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup> </td></tr></tbody></table> <p>Naltrexone and its <a href="/wiki/Active_metabolite" title="Active metabolite">active metabolite</a> <a href="/wiki/6%CE%B2-naltrexol" class="mw-redirect" title="6β-naltrexol">6β-naltrexol</a> are <a href="/wiki/Competitive_antagonist" class="mw-redirect" title="Competitive antagonist">competitive antagonists</a> of the <a href="/wiki/Opioid_receptor" title="Opioid receptor">opioid receptors</a>.<sup id="cite_ref-pmid4600601_81-0" class="reference"><a href="#cite_note-pmid4600601-81"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17267582_82-0" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> Naltrexone is specifically an antagonist preferentially of the <a href="/wiki/%CE%9C-opioid_receptor" title="Μ-opioid receptor">μ-opioid receptor</a> (MOR), to a lesser extent of the <a href="/wiki/%CE%9A-opioid_receptor" title="Κ-opioid receptor">κ-opioid receptor</a> (KOR), and to a much lesser extent of the <a href="/wiki/%CE%94-opioid_receptor" title="Δ-opioid receptor">δ-opioid receptor</a> (DOR).<sup id="cite_ref-pmid4600601_81-1" class="reference"><a href="#cite_note-pmid4600601-81"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup> However, naltrexone is not actually a <a href="/wiki/Silent_antagonist" class="mw-redirect" title="Silent antagonist">silent antagonist</a> of these receptors but instead acts as a weak <a href="/wiki/Partial_agonist" title="Partial agonist">partial agonist</a>, with <a href="/wiki/Intrinsic_activity" title="Intrinsic activity">E<sub>max</sub></a> values of 14 to 29% at the MOR, 16 to 39% at the KOR, and 14 to 25% at the DOR in different studies.<sup id="cite_ref-pmid17267582_82-1" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19282177_79-1" class="reference"><a href="#cite_note-pmid19282177-79"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Dwoskin2014_80-1" class="reference"><a href="#cite_note-Dwoskin2014-80"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup> In accordance with its partial agonism, although naltrexone is described as a pure opioid receptor antagonist, it has shown some evidence of weak opioid effects in clinical and preclinical studies.<sup id="cite_ref-pmid2836152_6-6" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p><p>By itself, naltrexone acts as an antagonist or weak partial agonist of the opioid receptors.<sup id="cite_ref-pmid17267582_82-2" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> In combination with agonists of the MOR such as <a href="/wiki/Morphine" title="Morphine">morphine</a> however, naltrexone appears to become an <a href="/wiki/Inverse_agonist" title="Inverse agonist">inverse agonist</a> of the MOR.<sup id="cite_ref-pmid17267582_82-3" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> Conversely, the naltrexone remains a neutral antagonist (or weak partial agonist) of the KOR and DOR.<sup id="cite_ref-pmid17267582_82-4" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> In contrast to naltrexone, 6β-naltrexol is purely a neutral antagonist of the opioid receptors.<sup id="cite_ref-pmid15680308_83-0" class="reference"><a href="#cite_note-pmid15680308-83"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> The MOR inverse agonism of naltrexone, when it is co-present with MOR agonists, may in part underlie its ability to precipitate <a href="/wiki/Opioid_withdrawal" title="Opioid withdrawal">withdrawal</a> in <a href="/wiki/Opioid_dependence" class="mw-redirect" title="Opioid dependence">opioid-dependent</a> individuals.<sup id="cite_ref-pmid15680308_83-1" class="reference"><a href="#cite_note-pmid15680308-83"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17267582_82-5" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> This may be due to suppression of basal MOR signaling via inverse agonism.<sup id="cite_ref-pmid15680308_83-2" class="reference"><a href="#cite_note-pmid15680308-83"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17267582_82-6" class="reference"><a href="#cite_note-pmid17267582-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Receptor_occupancy" class="mw-redirect" title="Receptor occupancy">Occupancy</a> of the opioid receptors in the brain by naltrexone has been studied using <a href="/wiki/Positron_emission_tomography" title="Positron emission tomography">positron emission tomography</a> (PET).<sup id="cite_ref-pmid20201811_25-3" class="reference"><a href="#cite_note-pmid20201811-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid32541931_84-0" class="reference"><a href="#cite_note-pmid32541931-84"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup> Naltrexone at a dose of 50&#160;mg/day has been found to occupy approximately 90 to 95% of brain MORs and 20 to 35% of brain DORs.<sup id="cite_ref-pmid20201811_25-4" class="reference"><a href="#cite_note-pmid20201811-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> Naltrexone at a dose of 100&#160;mg/day has been found to achieve 87% and 92% brain occupancy of the KOR in different studies.<sup id="cite_ref-pmid34363128_85-0" class="reference"><a href="#cite_note-pmid34363128-85"><span class="cite-bracket">&#91;</span>85<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid32541931_84-1" class="reference"><a href="#cite_note-pmid32541931-84"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-VijayMorrisGoldberg2017_86-0" class="reference"><a href="#cite_note-VijayMorrisGoldberg2017-86"><span class="cite-bracket">&#91;</span>86<span class="cite-bracket">&#93;</span></a></sup> Per simulation, a lower dose of naltrexone of 25&#160;mg/day might be expected to achieve around 60% brain occupancy of the KOR but still close to 90% occupancy of the MOR.<sup id="cite_ref-pmid32541931_84-2" class="reference"><a href="#cite_note-pmid32541931-84"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup> In a study of the duration of MOR blockade with naltrexone, the drug with a single 50&#160;mg dose showed 91% blockade of brain <a href="/wiki/Carfentanil" title="Carfentanil">[<sup>11</sup>C]carfentanil</a> (a selective MOR ligand) binding at 48&#160;hours (2&#160;days), 80% blockade at 72&#160;hours (3&#160;days), 46% blockade at 120&#160;hours (5&#160;days), and 30% blockade at 168&#160;hours (7&#160;days).<sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-1" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-1" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> The half-time of brain MOR blockade by naltrexone in this study was 72 to 108&#160;hours (3.0 to 4.5&#160;days).<sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-2" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-2" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> Based on these findings, doses of naltrexone of even less than 50&#160;mg/day would be expected to achieve virtually complete brain MOR occupancy.<sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-3" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-3" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> Blockade of brain MORs with naltrexone is much longer-lasting than with other <a href="/wiki/Opioid_antagonist" title="Opioid antagonist">opioid antagonists</a> like <a href="/wiki/Naloxone" title="Naloxone">naloxone</a> (half-time of ~1.7&#160;hours <a href="/wiki/Intranasal_administration" class="mw-redirect" title="Intranasal administration">intranasally</a>) or <a href="/wiki/Nalmefene" title="Nalmefene">nalmefene</a> (half-time of ~29&#160;hours).<sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-4" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-van_WaardeAbsalomVisser2020_87-0" class="reference"><a href="#cite_note-van_WaardeAbsalomVisser2020-87"><span class="cite-bracket">&#91;</span>87<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid20868291_88-0" class="reference"><a href="#cite_note-pmid20868291-88"><span class="cite-bracket">&#91;</span>88<span class="cite-bracket">&#93;</span></a></sup> </p><p>The half-life of occupancy of the brain MOR and duration of clinical effect of naltrexone are much longer than suggested by its <a href="/wiki/Plasma_elimination_half-life" class="mw-redirect" title="Plasma elimination half-life">plasma elimination half-life</a>.<sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-5" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid21731898_89-0" class="reference"><a href="#cite_note-pmid21731898-89"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-4" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid10463317_90-0" class="reference"><a href="#cite_note-pmid10463317-90"><span class="cite-bracket">&#91;</span>90<span class="cite-bracket">&#93;</span></a></sup> A single 50&#160;mg oral dose of naltrexone has been found to block brain MORs and opioid effects for at least 48 to 72&#160;hours.<sup id="cite_ref-pmid21731898_89-1" class="reference"><a href="#cite_note-pmid21731898-89"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-5" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-DHHS1981_91-0" class="reference"><a href="#cite_note-DHHS1981-91"><span class="cite-bracket">&#91;</span>91<span class="cite-bracket">&#93;</span></a></sup> The half-time of brain MOR blockade by naltrexone (72–108&#160;hours) is much longer than the fast plasma clearance component of naltrexone and 6β-naltrexol (~4–12&#160;hours) but was reported to correspond well to the longer terminal phase of plasma naltrexone clearance (96&#160;hours).<sup id="cite_ref-ColasantiLingford-HughesNutt2013_9-6" class="reference"><a href="#cite_note-ColasantiLingford-HughesNutt2013-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2839637_10-6" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid12028745_48-9" class="reference"><a href="#cite_note-pmid12028745-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> As an alternative possibility, the prolonged brain MOR occupancy by opioid antagonists like naltrexone and nalmefene may be due to slow dissociation from MORs consequent to their very high MOR <a href="/wiki/Affinity_(pharmacology)" class="mw-redirect" title="Affinity (pharmacology)">affinity</a> (&lt;1.0&#160;nM).<sup id="cite_ref-pmid20868291_88-1" class="reference"><a href="#cite_note-pmid20868291-88"><span class="cite-bracket">&#91;</span>88<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid15956985_92-0" class="reference"><a href="#cite_note-pmid15956985-92"><span class="cite-bracket">&#91;</span>92<span class="cite-bracket">&#93;</span></a></sup> </p><p>Naltrexone <a href="/wiki/Opioid_antagonist" title="Opioid antagonist">blocks the effects</a> of MOR agonists like <a href="/wiki/Morphine" title="Morphine">morphine</a>, <a href="/wiki/Heroin" title="Heroin">heroin</a>, and <a href="/wiki/Hydromorphone" title="Hydromorphone">hydromorphone</a> in humans via its MOR antagonism.<sup id="cite_ref-pmid2836152_6-7" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-SevarinoKosten2009_11-1" class="reference"><a href="#cite_note-SevarinoKosten2009-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> Following a single 100&#160;mg dose of naltrexone, the subjective and objective effects of heroin were blocked by 90% at 24&#160;hours, with blockade then decreasing up to 72&#160;hours.<sup id="cite_ref-pmid2836152_6-8" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Similarly, 20 to 200&#160;mg naltrexone dose-dependently antagonized the effects of heroin for up to 72&#160;hours.<sup id="cite_ref-pmid2836152_6-9" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Naltrexone also <a href="/wiki/Trip_killer" title="Trip killer">blocks the effects</a> of KOR agonists like <a href="/wiki/Salvinorin_A" title="Salvinorin A">salvinorin A</a>, <a href="/wiki/Pentazocine" title="Pentazocine">pentazocine</a>, and <a href="/wiki/Butorphanol" title="Butorphanol">butorphanol</a> in humans via its KOR antagonism.<sup id="cite_ref-pmid26874330_93-0" class="reference"><a href="#cite_note-pmid26874330-93"><span class="cite-bracket">&#91;</span>93<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17909753_94-0" class="reference"><a href="#cite_note-pmid17909753-94"><span class="cite-bracket">&#91;</span>94<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid7679737_95-0" class="reference"><a href="#cite_note-pmid7679737-95"><span class="cite-bracket">&#91;</span>95<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid31376930_74-1" class="reference"><a href="#cite_note-pmid31376930-74"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup> In addition to opioids, naltrexone has been found to block or reduce the rewarding and other effects of other <a href="/wiki/Euphoriant" class="mw-redirect" title="Euphoriant">euphoriant</a> drugs including <a href="/wiki/Alcohol_(drug)" title="Alcohol (drug)">alcohol</a>,<sup id="cite_ref-pmid21768981_57-4" class="reference"><a href="#cite_note-pmid21768981-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Nicotine" title="Nicotine">nicotine</a>,<sup id="cite_ref-pmid12233982_96-0" class="reference"><a href="#cite_note-pmid12233982-96"><span class="cite-bracket">&#91;</span>96<span class="cite-bracket">&#93;</span></a></sup> and <a href="/wiki/Substituted_amphetamine" title="Substituted amphetamine">amphetamines</a>.<sup id="cite_ref-pmid30451013_97-0" class="reference"><a href="#cite_note-pmid30451013-97"><span class="cite-bracket">&#91;</span>97<span class="cite-bracket">&#93;</span></a></sup> </p><p>The opioid receptors are involved in <a href="/wiki/Neuroendocrine" class="mw-redirect" title="Neuroendocrine">neuroendocrine</a> regulation.<sup id="cite_ref-pmid2836152_6-10" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> MOR agonists produce increases in levels of <a href="/wiki/Prolactin" title="Prolactin">prolactin</a> and decreases in levels of <a href="/wiki/Luteinizing_hormone" title="Luteinizing hormone">luteinizing hormone</a> (LH) and <a href="/wiki/Testosterone" title="Testosterone">testosterone</a>.<sup id="cite_ref-pmid2836152_6-11" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Doses of naltrexone of 25 to 150&#160;mg/day have been found to produce significant increases in levels of <a href="/wiki/%CE%92-endorphin" class="mw-redirect" title="Β-endorphin">β-endorphin</a>, <a href="/wiki/Cortisol" title="Cortisol">cortisol</a>, and LH, equivocal changes in levels of prolactin and testosterone, and no significant changes in levels of <a href="/wiki/Adrenocorticotrophic_hormone" class="mw-redirect" title="Adrenocorticotrophic hormone">adrenocorticotrophic hormone</a> (ACTH) or <a href="/wiki/Follicle-stimulating_hormone" title="Follicle-stimulating hormone">follicle-stimulating hormone</a> (FSH).<sup id="cite_ref-pmid2836152_6-12" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Naltrexone influences the <a href="/wiki/Hypothalamic%E2%80%93pituitary%E2%80%93adrenal_axis" title="Hypothalamic–pituitary–adrenal axis">hypothalamic–pituitary–adrenal axis</a> (HPA axis) probably through interference with opioid receptor signaling by <a href="/wiki/Endorphin" class="mw-redirect" title="Endorphin">endorphins</a>.<sup id="cite_ref-pmid2836152_6-13" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p><p>Blockade of MORs is thought to be the <a href="/wiki/Mechanism_of_action" title="Mechanism of action">mechanism of action</a> of naltrexone in the management of opioid dependence—it reversibly blocks or attenuates the effects of opioids. It is also thought to be involved in the effectiveness of naltrexone in alcohol dependence by reducing the euphoric effects of alcohol. The role of KOR modulation by naltrexone in its effectiveness for alcohol dependence is unclear but this action may also be involved based on theory and animal studies.<sup id="cite_ref-pmid26845589_98-0" class="reference"><a href="#cite_note-pmid26845589-98"><span class="cite-bracket">&#91;</span>98<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid27475769_99-0" class="reference"><a href="#cite_note-pmid27475769-99"><span class="cite-bracket">&#91;</span>99<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Other_activities">Other activities</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=15" title="Edit section: Other activities"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In addition to the <a href="/wiki/Opioid_receptor" title="Opioid receptor">opioid receptors</a>, naltrexone binds to and acts as an <a href="/wiki/Receptor_antagonist" title="Receptor antagonist">antagonist</a> of the <a href="/wiki/Opioid_growth_factor_receptor" class="mw-redirect" title="Opioid growth factor receptor">opioid growth factor receptor</a> (OGFR) and <a href="/wiki/Toll-like_receptor_4" title="Toll-like receptor 4">toll-like receptor 4</a> (TLR4) and interacts with high- and low-<a href="/wiki/Affinity_(pharmacology)" class="mw-redirect" title="Affinity (pharmacology)">affinity</a> <a href="/wiki/Binding_site" title="Binding site">binding sites</a> in <a href="/wiki/FLNA" title="FLNA">filamin A</a> (FLNA).<sup id="cite_ref-pmid30248938_100-0" class="reference"><a href="#cite_note-pmid30248938-100"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid26022268_101-0" class="reference"><a href="#cite_note-pmid26022268-101"><span class="cite-bracket">&#91;</span>101<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid30582992_102-0" class="reference"><a href="#cite_note-pmid30582992-102"><span class="cite-bracket">&#91;</span>102<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid11890982_103-0" class="reference"><a href="#cite_note-pmid11890982-103"><span class="cite-bracket">&#91;</span>103<span class="cite-bracket">&#93;</span></a></sup> It is said that very low doses of naltrexone (&lt;0.001–1&#160;mg/day) interact with FLNA, low doses (1 to 5&#160;mg/day) produce TLR4 antagonism, and standard clinical doses (50 to 100&#160;mg/day) exert opioid receptor and OGFR antagonism.<sup id="cite_ref-pmid30248938_100-1" class="reference"><a href="#cite_note-pmid30248938-100"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid30582992_102-1" class="reference"><a href="#cite_note-pmid30582992-102"><span class="cite-bracket">&#91;</span>102<span class="cite-bracket">&#93;</span></a></sup> The interactions of naltrexone with FLNA and TLR4 are claimed to be involved in the therapeutic effects of <a href="/wiki/Low-dose_naltrexone" title="Low-dose naltrexone">low-dose naltrexone</a>.<sup id="cite_ref-pmid30248938_100-2" class="reference"><a href="#cite_note-pmid30248938-100"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Pharmacokinetics">Pharmacokinetics</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=16" title="Edit section: Pharmacokinetics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right skin-invert-image" typeof="mw:File/Thumb"><a href="/wiki/File:Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png/400px-Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png" decoding="async" width="400" height="242" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/af/Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png/600px-Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/af/Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png/800px-Naltrexone_levels_with_a_50_mg_oral_dose_of_naltrexone_at_steady_state.png 2x" data-file-width="2031" data-file-height="1227" /></a><figcaption>Naltrexone levels following a 50&#160;mg oral dose of naltrexone at <a href="/wiki/Steady_state_(pharmacokinetics)" class="mw-redirect" title="Steady state (pharmacokinetics)">steady state</a> during treatment with 50&#160;mg/day naltrexone<sup id="cite_ref-pmid15569605_104-0" class="reference"><a href="#cite_note-pmid15569605-104"><span class="cite-bracket">&#91;</span>104<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid24704710_105-0" class="reference"><a href="#cite_note-pmid24704710-105"><span class="cite-bracket">&#91;</span>105<span class="cite-bracket">&#93;</span></a></sup></figcaption></figure> <figure class="mw-halign-right skin-invert-image" typeof="mw:File/Thumb"><a href="/wiki/File:Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/48/Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png/400px-Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png" decoding="async" width="400" height="243" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/48/Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png/600px-Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/48/Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png/800px-Naltrexone_levels_following_an_intramuscular_injection_of_380_mg_naltrexone_in_microspheres.png 2x" data-file-width="2110" data-file-height="1280" /></a><figcaption>Naltrexone levels following a 380&#160;mg dose of naltrexone in microspheres (Vivitrol) by intramuscular injection at steady state during monthly treatment with 380&#160;mg naltrexone in microspheres<sup id="cite_ref-pmid16499489_106-0" class="reference"><a href="#cite_note-pmid16499489-106"><span class="cite-bracket">&#91;</span>106<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid16978037_107-0" class="reference"><a href="#cite_note-pmid16978037-107"><span class="cite-bracket">&#91;</span>107<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17939765_108-0" class="reference"><a href="#cite_note-pmid17939765-108"><span class="cite-bracket">&#91;</span>108<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Vivitrol2018_109-0" class="reference"><a href="#cite_note-Vivitrol2018-109"><span class="cite-bracket">&#91;</span>109<span class="cite-bracket">&#93;</span></a></sup></figcaption></figure> <div class="mw-heading mw-heading4"><h4 id="Absorption">Absorption</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=17" title="Edit section: Absorption"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Absorption_(pharmacokinetics)" class="mw-redirect" title="Absorption (pharmacokinetics)">absorption</a> of naltrexone with <a href="/wiki/Oral_administration" title="Oral administration">oral administration</a> is rapid and nearly complete (96%).<sup id="cite_ref-ReviaLabel_3-10" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/Bioavailability" title="Bioavailability">bioavailability</a> of naltrexone with oral administration is 5 to 60% due to extensive <a href="/wiki/First-pass_metabolism" class="mw-redirect" title="First-pass metabolism">first-pass metabolism</a>.<sup id="cite_ref-pmid2836152_6-14" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19537999_7-1" class="reference"><a href="#cite_note-pmid19537999-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Cmax_(pharmacology)" title="Cmax (pharmacology)">Peak concentrations</a> of naltrexone are 19 to 44&#160;μg/L after a single 100&#160;mg oral dose and <a href="/wiki/Tmax_(pharmacology)" class="mw-redirect" title="Tmax (pharmacology)">time to peak concentrations</a> of naltrexone and <a href="/wiki/6%CE%B2-naltrexol" class="mw-redirect" title="6β-naltrexol">6β-naltrexol</a> (<a href="/wiki/Metabolite" title="Metabolite">metabolite</a>) is within 1&#160;hour.<sup id="cite_ref-pmid2836152_6-15" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19537999_7-2" class="reference"><a href="#cite_note-pmid19537999-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ReviaLabel_3-11" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> Linear increases in circulating naltrexone and 6β-naltrexol concentrations occur over an oral dose range of 50 to 200&#160;mg.<sup id="cite_ref-pmid2836152_6-16" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Naltrexone does not appear to be accumulated with repeated once-daily oral administration and there is no change in time to peak concentrations with repeated administration.<sup id="cite_ref-pmid2836152_6-17" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Distribution">Distribution</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=18" title="Edit section: Distribution"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Plasma_protein_binding" title="Plasma protein binding">plasma protein binding</a> of naltrexone is about 20% over a naltrexone concentration range of 0.1 to 500&#160;μg/L.<sup id="cite_ref-pmid2836152_6-18" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ReviaLabel_3-12" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> Its apparent <a href="/wiki/Volume_of_distribution" title="Volume of distribution">volume of distribution</a> at 100&#160;mg orally is 16.1&#160;L/kg after a single dose and 14.2&#160;L/kg with repeated doses.<sup id="cite_ref-pmid2836152_6-19" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Metabolism">Metabolism</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=19" title="Edit section: Metabolism"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone is <a href="/wiki/Metabolism" title="Metabolism">metabolized</a> in the liver mainly by <a href="/w/index.php?title=Dihydrodiol_dehydrogenase&amp;action=edit&amp;redlink=1" class="new" title="Dihydrodiol dehydrogenase (page does not exist)">dihydrodiol dehydrogenases</a> into <a href="/wiki/6%CE%B2-naltrexol" class="mw-redirect" title="6β-naltrexol">6β-naltrexol</a> (6β-hydroxynaltrexone).<sup id="cite_ref-pmid2836152_6-20" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19537999_7-3" class="reference"><a href="#cite_note-pmid19537999-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> Levels of 6β-naltrexol are 10- to 30-fold higher than those of naltrexone with oral administration due to extensive <a href="/wiki/First-pass_metabolism" class="mw-redirect" title="First-pass metabolism">first-pass metabolism</a>.<sup id="cite_ref-DavisGlare2009_110-0" class="reference"><a href="#cite_note-DavisGlare2009-110"><span class="cite-bracket">&#91;</span>110<span class="cite-bracket">&#93;</span></a></sup> Conversely, 6β-naltrexol exposure is only about 2-fold higher than that of naltrexone with <a href="/wiki/Intramuscular_injection" title="Intramuscular injection">intramuscular injection</a> of naltrexone in <a href="/wiki/Microsphere" class="mw-redirect" title="Microsphere">microspheres</a> (brand name Vivitrol).<sup id="cite_ref-pmid16499489_106-1" class="reference"><a href="#cite_note-pmid16499489-106"><span class="cite-bracket">&#91;</span>106<span class="cite-bracket">&#93;</span></a></sup> 6β-Naltrexol is an opioid receptor antagonist similarly to naltrexone and shows a comparable binding profile to the opioid receptors.<sup id="cite_ref-HipkinDolle2010_111-0" class="reference"><a href="#cite_note-HipkinDolle2010-111"><span class="cite-bracket">&#91;</span>111<span class="cite-bracket">&#93;</span></a></sup> However, 6β-naltrexol is <a href="/wiki/Peripherally_selective_drug" title="Peripherally selective drug">peripherally selective</a> and crosses into the brain much less readily than does naltrexone.<sup id="cite_ref-HipkinDolle2010_111-1" class="reference"><a href="#cite_note-HipkinDolle2010-111"><span class="cite-bracket">&#91;</span>111<span class="cite-bracket">&#93;</span></a></sup> In any case, 6β-naltrexol does still show some central activity and may contribute significantly to the central actions of oral naltrexone.<sup id="cite_ref-HipkinDolle2010_111-2" class="reference"><a href="#cite_note-HipkinDolle2010-111"><span class="cite-bracket">&#91;</span>111<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid2836152_6-21" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Other <a href="/wiki/Metabolite" title="Metabolite">metabolites</a> of naltrexone include 2-hydroxy-3-methoxy-6β-naltrexol and 2-hydroxy-3-methoxynaltrexone.<sup id="cite_ref-pmid2836152_6-22" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Following their formation, the metabolites of naltrexone are further metabolized by <a href="/wiki/Conjugation_(biochemistry)" class="mw-redirect" title="Conjugation (biochemistry)">conjugation</a> with <a href="/wiki/Glucuronic_acid" title="Glucuronic acid">glucuronic acid</a> to form <a href="/wiki/Glucuronide" title="Glucuronide">glucuronides</a>.<sup id="cite_ref-pmid2836152_6-23" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Naltrexone is not metabolized by the <a href="/wiki/Cytochrome_P450" title="Cytochrome P450">cytochrome P450</a> system and has low potential for <a href="/wiki/Drug_interaction" title="Drug interaction">drug interactions</a>.<sup id="cite_ref-SevarinoKosten2009_11-2" class="reference"><a href="#cite_note-SevarinoKosten2009-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Elimination">Elimination</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=20" title="Edit section: Elimination"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Elimination_(pharmacology)" title="Elimination (pharmacology)">elimination</a> of naltrexone is <a href="/wiki/Exponential_decay" title="Exponential decay">biexponential</a> and rapid over the first 24&#160;hours followed by a third extremely slow decline after 24&#160;hours.<sup id="cite_ref-pmid2836152_6-24" class="reference"><a href="#cite_note-pmid2836152-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> The fast <a href="/wiki/Elimination_half-life" class="mw-redirect" title="Elimination half-life">elimination half-lives</a> of naltrexone and its metabolite 6β-naltrexol are about 4&#160;hours and 13&#160;hours, respectively.<sup id="cite_ref-ReviaLabel_3-13" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> In Contrave oral tablets, which also contain <a href="/wiki/Bupropion" title="Bupropion">bupropion</a> and are described as <a href="/wiki/Extended-release" class="mw-redirect" title="Extended-release">extended-release</a>, the half-life of naltrexone is 5&#160;hours.<sup id="cite_ref-ContraveLabel_4-2" class="reference"><a href="#cite_note-ContraveLabel-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> The slow terminal-phase elimination half-life of naltrexone is approximately 96&#160;hours.<sup id="cite_ref-pmid2839637_10-7" class="reference"><a href="#cite_note-pmid2839637-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> As microspheres of naltrexone by intramuscular injection (Vivitrol), the elimination half-lives of naltrexone and 6β-naltrexol are both 5 to 10&#160;days.<sup id="cite_ref-VivitrolLabel_5-2" class="reference"><a href="#cite_note-VivitrolLabel-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> Whereas oral naltrexone is administered daily, naltrexone in microspheres by intramuscular injection is suitable for administration once every 4&#160;weeks or once per month.<sup id="cite_ref-VivitrolLabel_5-3" class="reference"><a href="#cite_note-VivitrolLabel-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> </p><p>Naltrexone and its metabolites are <a href="/wiki/Excretion" title="Excretion">excreted</a> in <a href="/wiki/Urine" title="Urine">urine</a>.<sup id="cite_ref-ReviaLabel_3-14" class="reference"><a href="#cite_note-ReviaLabel-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Pharmacogenetics">Pharmacogenetics</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=21" title="Edit section: Pharmacogenetics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Tentative evidence suggests that family history and presence of the Asn40Asp polymorphism predict naltrexone being effective.<sup id="cite_ref-112" class="reference"><a href="#cite_note-112"><span class="cite-bracket">&#91;</span>112<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Clinical_and_biological_moderators_24-1" class="reference"><a href="#cite_note-Clinical_and_biological_moderators-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Chemistry">Chemistry</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=22" title="Edit section: Chemistry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone, also known as <i>N</i>-cyclopropylmethylnoroxymorphone, is a <a href="/wiki/Chemical_derivative" class="mw-redirect" title="Chemical derivative">derivative</a> of <a href="/wiki/Oxymorphone" title="Oxymorphone">oxymorphone</a> (14-hydroxydihydromorphinone). It is specifically the derivative of oxymorphone in which the <a href="/wiki/Tertiary_amine" class="mw-redirect" title="Tertiary amine">tertiary amine</a> <a href="/wiki/Methyl" class="mw-redirect" title="Methyl">methyl</a> <a href="/wiki/Substituent" title="Substituent">substituent</a> is replaced with <a href="/wiki/Methylcyclopropane" title="Methylcyclopropane">methylcyclopropane</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Analogues">Analogues</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=23" title="Edit section: Analogues"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The closely related medication, <a href="/wiki/Methylnaltrexone" title="Methylnaltrexone">methylnaltrexone</a> (<i>N</i>-methylnaltrexone), is used to treat opioid-induced constipation but does not treat addiction as it does not cross the <a href="/wiki/Blood%E2%80%93brain_barrier" title="Blood–brain barrier">blood–brain barrier</a>. <a href="/wiki/Nalmefene" title="Nalmefene">Nalmefene</a> (6-desoxy-6-methylenenaltrexone) is similar to naltrexone and is used for the same purposes as naltrexone. Naltrexone should not be confused with <a href="/wiki/Naloxone" title="Naloxone">naloxone</a> (<i>N</i>-allylnoroxymorphone), which is used in emergency cases of opioid <a href="/wiki/Overdose" class="mw-redirect" title="Overdose">overdose</a>. Other opioid antagonists related to naltrexone include <a href="/wiki/6%CE%B2-naltrexol" class="mw-redirect" title="6β-naltrexol">6β-naltrexol</a> (6β-hydroxynaltrexone), <a href="/wiki/Samidorphan" title="Samidorphan">samidorphan</a> (3-carboxamido-4-hydroxynaltrexone), <a href="/wiki/%CE%92-funaltrexamine" class="mw-redirect" title="Β-funaltrexamine">β-funaltrexamine</a> (naltrexone fumarate methyl ester), <a href="/wiki/Nalodeine" title="Nalodeine">nalodeine</a> (<i>N</i>-allylnorcodeine), <a href="/wiki/Nalorphine" title="Nalorphine">nalorphine</a> (<i>N</i>-allylnormorphine), and <a href="/wiki/Nalbuphine" title="Nalbuphine">nalbuphine</a> (<i>N</i>-cyclobutylmethyl-14-hydroxydihydronormorphine). </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=24" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone was first <a href="/wiki/Chemical_synthesis" title="Chemical synthesis">synthesized</a> in 1963 by Metossian at Endo Laboratories, a small <a href="/wiki/Pharmaceutical_company" class="mw-redirect" title="Pharmaceutical company">pharmaceutical company</a> in <a href="/wiki/New_York_City" title="New York City">New York City</a>.<sup id="cite_ref-Dependence1974_113-0" class="reference"><a href="#cite_note-Dependence1974-113"><span class="cite-bracket">&#91;</span>113<span class="cite-bracket">&#93;</span></a></sup> It was characterized by Blumberg, Dayton, and Wolf in 1965 and was found to be an <a href="/wiki/Oral_administration" title="Oral administration">orally active</a>, long-acting, and very <a href="/wiki/Potency_(pharmacology)" title="Potency (pharmacology)">potent</a> opioid antagonist.<sup id="cite_ref-Dependence1974_113-1" class="reference"><a href="#cite_note-Dependence1974-113"><span class="cite-bracket">&#91;</span>113<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-PadwaCunningham2010_114-0" class="reference"><a href="#cite_note-PadwaCunningham2010-114"><span class="cite-bracket">&#91;</span>114<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Bennett2004_115-0" class="reference"><a href="#cite_note-Bennett2004-115"><span class="cite-bracket">&#91;</span>115<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Sad2012_14-1" class="reference"><a href="#cite_note-Sad2012-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> The drug showed advantages over earlier opioid antagonists such as <a href="/wiki/Cyclazocine" title="Cyclazocine">cyclazocine</a>, <a href="/wiki/Nalorphine" title="Nalorphine">nalorphine</a>, and naloxone, including its oral activity, a long <a href="/wiki/Duration_of_action" class="mw-redirect" title="Duration of action">duration of action</a> allowing for once-daily administration, and a lack of <a href="/wiki/Dysphoria" title="Dysphoria">dysphoria</a>, and was selected for further development.<sup id="cite_ref-Sad2012_14-2" class="reference"><a href="#cite_note-Sad2012-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> It was <a href="/wiki/Patent" title="Patent">patented</a> by Endo Laboratories in 1967 under the developmental code name EN-1639A and Endo Laboratories was acquired by <a href="/wiki/DuPont" title="DuPont">DuPont</a> in 1969.<sup id="cite_ref-Wouk2009_116-0" class="reference"><a href="#cite_note-Wouk2009-116"><span class="cite-bracket">&#91;</span>116<span class="cite-bracket">&#93;</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Verifiability#Self-published_sources" title="Wikipedia:Verifiability"><span title="The material near this tag may rely on a self-published source. (February 2020)">self-published source?</span></a></i>&#93;</sup> <a href="/wiki/Clinical_trial" title="Clinical trial">Clinical trials</a> for opioid dependence began in 1973, and a developmental collaboration of DuPont with the <a href="/wiki/National_Institute_on_Drug_Abuse" title="National Institute on Drug Abuse">National Institute on Drug Abuse</a> for this indication started the next year in 1974.<sup id="cite_ref-Wouk2009_116-1" class="reference"><a href="#cite_note-Wouk2009-116"><span class="cite-bracket">&#91;</span>116<span class="cite-bracket">&#93;</span></a></sup> The drug was approved by the FDA for the oral treatment of opioid dependence in 1984, with the brand name Trexan, and for the oral treatment of alcohol dependence in 1995, when the brand name was changed by DuPont to Revia.<sup id="cite_ref-Wouk2009_116-2" class="reference"><a href="#cite_note-Wouk2009-116"><span class="cite-bracket">&#91;</span>116<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Milhorn2017_42-2" class="reference"><a href="#cite_note-Milhorn2017-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup> A depot formulation for intramuscular injection was approved by the FDA under the brand name Vivitrol for alcohol dependence in 2006 and opioid dependence in 2010.<sup id="cite_ref-MedicalNewsToday2006_43-1" class="reference"><a href="#cite_note-MedicalNewsToday2006-43"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Milhorn2017_42-3" class="reference"><a href="#cite_note-Milhorn2017-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Society_and_culture">Society and culture</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=25" title="Edit section: Society and culture"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Generic_names">Generic names</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=26" title="Edit section: Generic names"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone is the <a href="/wiki/Generic_term" class="mw-redirect" title="Generic term">generic name</a> of the drug and its <a href="/wiki/International_Nonproprietary_Name" class="mw-redirect" title="International Nonproprietary Name"><abbr title="International Nonproprietary Name">INN</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip International Nonproprietary Name</span>, <a href="/wiki/United_States_Adopted_Name" title="United States Adopted Name"><abbr title="United States Adopted Name">USAN</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip United States Adopted Name</span>, <a href="/wiki/British_Approved_Name" title="British Approved Name"><abbr title="British Approved Name">BAN</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip British Approved Name</span>, <a href="/wiki/D%C3%A9nomination_Commune_Fran%C3%A7aise" title="Dénomination Commune Française"><abbr title="Dénomination Commune Française">DCF</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip Dénomination Commune Française</span>, and <a href="/wiki/Denominazione_Comune_Italiana" title="Denominazione Comune Italiana"><abbr title="Denominazione Comune Italiana">DCIT</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip Denominazione Comune Italiana</span>, while naltrexone hydrochloride is its <a href="/wiki/United_States_Pharmacopeia" title="United States Pharmacopeia"><abbr title="United States Pharmacopeia">USP</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip United States Pharmacopeia</span> and <a href="/wiki/British_Approved_Name" title="British Approved Name"><abbr title="British Approved Name">BANM</abbr></a><span class="sr-only" style="border: 0; clip: rect(0, 0, 0, 0); clip-path: polygon(0px 0px, 0px 0px, 0px 0px); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; white-space: nowrap;">Tooltip British Approved Name</span>.<sup id="cite_ref-Elks2014_117-0" class="reference"><a href="#cite_note-Elks2014-117"><span class="cite-bracket">&#91;</span>117<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-IndexNominum2000_118-0" class="reference"><a href="#cite_note-IndexNominum2000-118"><span class="cite-bracket">&#91;</span>118<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-MortonHall2012_119-0" class="reference"><a href="#cite_note-MortonHall2012-119"><span class="cite-bracket">&#91;</span>119<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Drugs.com_120-0" class="reference"><a href="#cite_note-Drugs.com-120"><span class="cite-bracket">&#91;</span>120<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Brand_names">Brand names</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=27" title="Edit section: Brand names"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone is or has been sold under a variety of brand names, including Adepend, Antaxone, Celupan, Depade, Destoxican, Nalorex, Narcoral, Nemexin, Nodict, Revia, Trexan, Vivitrex, and Vivitrol.<sup id="cite_ref-Elks2014_117-1" class="reference"><a href="#cite_note-Elks2014-117"><span class="cite-bracket">&#91;</span>117<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-IndexNominum2000_118-1" class="reference"><a href="#cite_note-IndexNominum2000-118"><span class="cite-bracket">&#91;</span>118<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-MortonHall2012_119-1" class="reference"><a href="#cite_note-MortonHall2012-119"><span class="cite-bracket">&#91;</span>119<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Drugs.com_120-1" class="reference"><a href="#cite_note-Drugs.com-120"><span class="cite-bracket">&#91;</span>120<span class="cite-bracket">&#93;</span></a></sup> It is also marketed in combination with <a href="/wiki/Bupropion" title="Bupropion">bupropion</a> (<a href="/wiki/Naltrexone/bupropion" title="Naltrexone/bupropion">naltrexone/bupropion</a>) as Contrave,<sup id="cite_ref-121" class="reference"><a href="#cite_note-121"><span class="cite-bracket">&#91;</span>121<span class="cite-bracket">&#93;</span></a></sup> and was marketed with <a href="/wiki/Morphine" title="Morphine">morphine</a> (<a href="/wiki/Morphine/naltrexone" title="Morphine/naltrexone">morphine/naltrexone</a>) as Embeda.<sup id="cite_ref-Drugs.com_120-2" class="reference"><a href="#cite_note-Drugs.com-120"><span class="cite-bracket">&#91;</span>120<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-122" class="reference"><a href="#cite_note-122"><span class="cite-bracket">&#91;</span>122<span class="cite-bracket">&#93;</span></a></sup> A combination of naltrexone with <a href="/wiki/Buprenorphine" title="Buprenorphine">buprenorphine</a> (<a href="/wiki/Buprenorphine/naltrexone" title="Buprenorphine/naltrexone">buprenorphine/naltrexone</a>) has been developed, but has not been marketed.<sup id="cite_ref-pmid18212797_123-0" class="reference"><a href="#cite_note-pmid18212797-123"><span class="cite-bracket">&#91;</span>123<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Controversies">Controversies</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=28" title="Edit section: Controversies"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The FDA authorized use of injectable naltrexone (Vivitrol) for opioid addiction using a single study<sup id="cite_ref-124" class="reference"><a href="#cite_note-124"><span class="cite-bracket">&#91;</span>124<span class="cite-bracket">&#93;</span></a></sup> that was led by Evgeny Krupitsky at Bekhterev Research Psychoneurological Institute, St Petersburg State Pavlov Medical University, St Petersburg, Russia,<sup id="cite_ref-Lancet_Krupitsky_2011_naltrexone_125-0" class="reference"><a href="#cite_note-Lancet_Krupitsky_2011_naltrexone-125"><span class="cite-bracket">&#91;</span>125<span class="cite-bracket">&#93;</span></a></sup> a country where opioid agonists such as methadone and buprenorphine are not available. The study was a "double-blind, placebo-controlled, randomized", 24-week trial running "from July 3, 2008, through October 5, 2009" with "250 patients with opioid dependence disorder" at "13 clinical sites in Russia" on the use of injectable naltrexone (XR-NTX) for opioid dependence. The study was funded by the Boston-based biotech <a href="/wiki/Alkermes_(company)" class="mw-redirect" title="Alkermes (company)">Alkermes</a> firm which produces and markets naltrexone in the United States. Critics charged that the study violated ethical guidelines since it compared the formulation of naltrexone not to the best available, evidence-based treatment (methadone or buprenorphine), but to a placebo. Further, the trial did not follow patients who dropped out of the trial to evaluate subsequent risk of fatal overdose, a major health concern .<sup id="cite_ref-126" class="reference"><a href="#cite_note-126"><span class="cite-bracket">&#91;</span>126<span class="cite-bracket">&#93;</span></a></sup> Subsequent trials in Norway and the US did compare injectable naltrexone to buprenorphine and found them to be similar in outcomes for patients willing to undergo the withdrawal symptoms required before naltrexone administration.<sup id="cite_ref-127" class="reference"><a href="#cite_note-127"><span class="cite-bracket">&#91;</span>127<span class="cite-bracket">&#93;</span></a></sup> Nearly 30% of patients in the US trial did not complete induction.<sup id="cite_ref-Comparative_effectiveness_of_extend_33-1" class="reference"><a href="#cite_note-Comparative_effectiveness_of_extend-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> In real-world settings, a review of more than 40,000 patient records found that while <a href="/wiki/Methadone" title="Methadone">methadone</a> and <a href="/wiki/Buprenorphine" title="Buprenorphine">buprenorphine</a> reduced risk of fatal overdose, naltrexone administration showed no greater effect on overdose or subsequent emergency care than counseling alone.<sup id="cite_ref-Wakeman_2020_30-1" class="reference"><a href="#cite_note-Wakeman_2020-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> </p><p>Despite these findings, naltrexone's manufacturer and some health authorities have promoted the medicine as superior to methadone and buprenorphine since it is not an opioid and does not induce dependence. The manufacturer has also marketed directly to law enforcement and criminal justice officials, spending millions of dollars on lobbying and providing thousands of free doses to jails and prisons.<sup id="cite_ref-NYT_2017_Vivitrol_128-0" class="reference"><a href="#cite_note-NYT_2017_Vivitrol-128"><span class="cite-bracket">&#91;</span>128<span class="cite-bracket">&#93;</span></a></sup> The technique has been successful, with the criminal justice system in 43 states now incorporating long-acting naltrexone. Many do this through Vivitrol courts that offer only this option, leading some to characterize this as "an offer that cannot be refused."<sup id="cite_ref-129" class="reference"><a href="#cite_note-129"><span class="cite-bracket">&#91;</span>129<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-130" class="reference"><a href="#cite_note-130"><span class="cite-bracket">&#91;</span>130<span class="cite-bracket">&#93;</span></a></sup> The company's marketing techniques have led to a Congressional investigation,<sup id="cite_ref-131" class="reference"><a href="#cite_note-131"><span class="cite-bracket">&#91;</span>131<span class="cite-bracket">&#93;</span></a></sup> and warning from the FDA about failure to adequately state risks of fatal overdose to patients receiving the medicine.<sup id="cite_ref-132" class="reference"><a href="#cite_note-132"><span class="cite-bracket">&#91;</span>132<span class="cite-bracket">&#93;</span></a></sup> </p><p>In May 2017, <a href="/wiki/United_States_Secretary_of_Health_and_Human_Services" title="United States Secretary of Health and Human Services">United States Secretary of Health and Human Services</a> <a href="/wiki/Tom_Price_(American_politician)" title="Tom Price (American politician)">Tom Price</a> praised [Vivitrol] as the future of opioid addiction treatment after visiting the company's plant in Ohio.<sup id="cite_ref-NYT_2017_Vivitrol_128-1" class="reference"><a href="#cite_note-NYT_2017_Vivitrol-128"><span class="cite-bracket">&#91;</span>128<span class="cite-bracket">&#93;</span></a></sup> His remarks set off sharp criticism with almost 700 experts in the field of substance use submitting a letter to Price cautioning him about Vivitrol's "marketing tactics" and warning him that his comments "ignore widely accepted science".<sup id="cite_ref-Tom-Price-Letter-Re-MAT_2017_133-0" class="reference"><a href="#cite_note-Tom-Price-Letter-Re-MAT_2017-133"><span class="cite-bracket">&#91;</span>133<span class="cite-bracket">&#93;</span></a></sup> The experts pointed out that Vivitrol's competitors, buprenorphine and methadone, are "less expensive", "more widely used", and have been "rigorously studied". Price had claimed that buprenorphine and methadone were "simply substitute[s]" for "illicit drugs"<sup id="cite_ref-NYT_2017_Vivitrol_128-2" class="reference"><a href="#cite_note-NYT_2017_Vivitrol-128"><span class="cite-bracket">&#91;</span>128<span class="cite-bracket">&#93;</span></a></sup> whereas according to the letter, "the substantial body of research evidence supporting these treatments is summarized in guidance from within your own agency, including the Substance Abuse and Mental Health Services Administration, the US Surgeon General, the National Institute on Drug Abuse, and the Centers for Disease Control and Prevention. Buprenorphine and methadone have been demonstrated to be highly effective in managing the core symptoms of opioid use disorder, reducing the risk of relapse and fatal overdose, and encouraging long-term recovery."<sup id="cite_ref-Tom-Price-Letter-Re-MAT_2017_133-1" class="reference"><a href="#cite_note-Tom-Price-Letter-Re-MAT_2017-133"><span class="cite-bracket">&#91;</span>133<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Film">Film</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=29" title="Edit section: Film"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/One_Little_Pill_(2014_film)" class="mw-redirect" title="One Little Pill (2014 film)"><i>One Little Pill</i></a> was a 2014 documentary film about the use of naltrexone to treat alcohol use disorder.<sup id="cite_ref-IMDB_134-0" class="reference"><a href="#cite_note-IMDB-134"><span class="cite-bracket">&#91;</span>134<span class="cite-bracket">&#93;</span></a></sup> </p><p><i><a href="/wiki/Four_Good_Days" title="Four Good Days">Four Good Days</a></i> is a 2020 film about the four days a drug addict woman has to stay sober to get a shot of naltrexone in a detox facility. </p> <div class="mw-heading mw-heading2"><h2 id="Research">Research</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=30" title="Edit section: Research"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Depersonalization">Depersonalization</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=31" title="Edit section: Depersonalization"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone is sometimes used in the treatment of <a href="/wiki/Dissociation_(psychology)" title="Dissociation (psychology)">dissociative</a> symptoms such as <a href="/wiki/Depersonalization" title="Depersonalization">depersonalization</a> and <a href="/wiki/Derealization" title="Derealization">derealization</a>.<sup id="cite_ref-SimeonAbugel2008_135-0" class="reference"><a href="#cite_note-SimeonAbugel2008-135"><span class="cite-bracket">&#91;</span>135<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-PhDPhD2014_136-0" class="reference"><a href="#cite_note-PhDPhD2014-136"><span class="cite-bracket">&#91;</span>136<span class="cite-bracket">&#93;</span></a></sup> Some studies suggest it might help.<sup id="cite_ref-137" class="reference"><a href="#cite_note-137"><span class="cite-bracket">&#91;</span>137<span class="cite-bracket">&#93;</span></a></sup> Other small, preliminary studies have also shown benefit.<sup id="cite_ref-SimeonAbugel2008_135-1" class="reference"><a href="#cite_note-SimeonAbugel2008-135"><span class="cite-bracket">&#91;</span>135<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-PhDPhD2014_136-1" class="reference"><a href="#cite_note-PhDPhD2014-136"><span class="cite-bracket">&#91;</span>136<span class="cite-bracket">&#93;</span></a></sup> Blockade of the KOR by naltrexone and naloxone is thought to be responsible for their effectiveness in ameliorating depersonalization and derealization.<sup id="cite_ref-SimeonAbugel2008_135-2" class="reference"><a href="#cite_note-SimeonAbugel2008-135"><span class="cite-bracket">&#91;</span>135<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-PhDPhD2014_136-2" class="reference"><a href="#cite_note-PhDPhD2014-136"><span class="cite-bracket">&#91;</span>136<span class="cite-bracket">&#93;</span></a></sup> Since these drugs are less efficacious in blocking the KOR relative to the MOR, higher doses than typically used seem to be necessary.<sup id="cite_ref-SimeonAbugel2008_135-3" class="reference"><a href="#cite_note-SimeonAbugel2008-135"><span class="cite-bracket">&#91;</span>135<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-PhDPhD2014_136-3" class="reference"><a href="#cite_note-PhDPhD2014-136"><span class="cite-bracket">&#91;</span>136<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Low-dose_naltrexone">Low-dose naltrexone</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=32" title="Edit section: Low-dose naltrexone"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone has been used <a href="/wiki/Off-label_use" title="Off-label use">off-label</a> at low doses for diseases not related to chemical dependency or intoxication, such as <a href="/wiki/Multiple_sclerosis" title="Multiple sclerosis">multiple sclerosis</a>.<sup id="cite_ref-Novella_138-0" class="reference"><a href="#cite_note-Novella-138"><span class="cite-bracket">&#91;</span>138<span class="cite-bracket">&#93;</span></a></sup> Evidence for recommending <a href="/wiki/Low-dose_naltrexone" title="Low-dose naltrexone">low-dose naltrexone</a> is lacking.<sup id="cite_ref-139" class="reference"><a href="#cite_note-139"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Novella2010_140-0" class="reference"><a href="#cite_note-Novella2010-140"><span class="cite-bracket">&#91;</span>140<span class="cite-bracket">&#93;</span></a></sup> This treatment has received attention on the <a href="/wiki/Internet" title="Internet">Internet</a>.<sup id="cite_ref-NMSS_141-0" class="reference"><a href="#cite_note-NMSS-141"><span class="cite-bracket">&#91;</span>141<span class="cite-bracket">&#93;</span></a></sup> In 2022, four studies (in a few hundred patients) were conducted on naltrexone for <a href="/wiki/Long_COVID" title="Long COVID">long COVID</a>.<sup id="cite_ref-142" class="reference"><a href="#cite_note-142"><span class="cite-bracket">&#91;</span>142<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Self-injury">Self-injury</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=33" title="Edit section: Self-injury"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>One study suggests that <a href="/wiki/Self-harm" title="Self-harm">self-injurious behaviors</a> present in persons with developmental disabilities (including autism) can sometimes be remedied with naltrexone.<sup id="cite_ref-143" class="reference"><a href="#cite_note-143"><span class="cite-bracket">&#91;</span>143<span class="cite-bracket">&#93;</span></a></sup> In these cases, the self-injury is believed to be done to release <a href="/wiki/Beta-endorphin" class="mw-redirect" title="Beta-endorphin">beta-endorphin</a>, which binds to the same receptors as heroin and morphine.<sup id="cite_ref-144" class="reference"><a href="#cite_note-144"><span class="cite-bracket">&#91;</span>144<span class="cite-bracket">&#93;</span></a></sup> If the "rush" generated by self-injury is removed, the behavior may stop. </p> <div class="mw-heading mw-heading3"><h3 id="Behavioral_disorders">Behavioral disorders</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=34" title="Edit section: Behavioral disorders"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some indications exist that naltrexone might be beneficial in the treatment of impulse-control disorders such as <a href="/wiki/Kleptomania" title="Kleptomania">kleptomania</a>, compulsive gambling, or <a href="/wiki/Trichotillomania" title="Trichotillomania">trichotillomania</a> (compulsive hair pulling), but evidence of its effectiveness for gambling is conflicting.<sup id="cite_ref-145" class="reference"><a href="#cite_note-145"><span class="cite-bracket">&#91;</span>145<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-gambling_146-0" class="reference"><a href="#cite_note-gambling-146"><span class="cite-bracket">&#91;</span>146<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-147" class="reference"><a href="#cite_note-147"><span class="cite-bracket">&#91;</span>147<span class="cite-bracket">&#93;</span></a></sup> A 2008 case study reported successful use of naltrexone in suppressing and treating an internet <a href="/wiki/Pornography_addiction" title="Pornography addiction">pornography addiction</a>.<sup id="cite_ref-148" class="reference"><a href="#cite_note-148"><span class="cite-bracket">&#91;</span>148<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Interferon_alpha">Interferon alpha</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=35" title="Edit section: Interferon alpha"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Naltrexone is effective in suppressing the <a href="/wiki/Cytokine" title="Cytokine">cytokine</a>-mediated adverse neuropsychiatric effects of <a href="/wiki/Interferon_alpha" class="mw-redirect" title="Interferon alpha">interferon alpha</a> therapy.<sup id="cite_ref-pmid16142050_149-0" class="reference"><a href="#cite_note-pmid16142050-149"><span class="cite-bracket">&#91;</span>149<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17068950_150-0" class="reference"><a href="#cite_note-pmid17068950-150"><span class="cite-bracket">&#91;</span>150<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Critical_addiction_studies">Critical addiction studies</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=36" title="Edit section: Critical addiction studies"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Some historians and sociologists have suggested that the meanings and uses attributed to anti-craving medicine, such as naltrexone, are context-dependent.<sup id="cite_ref-151" class="reference"><a href="#cite_note-151"><span class="cite-bracket">&#91;</span>151<span class="cite-bracket">&#93;</span></a></sup> Studies have suggested the use of naltrexone in drug courts or healthcare rehabs is a form of "post-social control,"<sup id="cite_ref-152" class="reference"><a href="#cite_note-152"><span class="cite-bracket">&#91;</span>152<span class="cite-bracket">&#93;</span></a></sup> or "post-disciplinary control,"<sup id="cite_ref-153" class="reference"><a href="#cite_note-153"><span class="cite-bracket">&#91;</span>153<span class="cite-bracket">&#93;</span></a></sup> whereby control strategies for managing offenders and addicts shift from imprisonment and supervision toward more direct control over biological processes. </p> <div class="mw-heading mw-heading3"><h3 id="Sexual_addiction">Sexual addiction</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=37" title="Edit section: Sexual addiction"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Small studies have shown a reduction of <a href="/wiki/Sexual_addiction" title="Sexual addiction">sexual addiction</a> and problematic sexual behaviours from naltrexone.<sup id="cite_ref-154" class="reference"><a href="#cite_note-154"><span class="cite-bracket">&#91;</span>154<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-155" class="reference"><a href="#cite_note-155"><span class="cite-bracket">&#91;</span>155<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Naltrexone&amp;action=edit&amp;section=38" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.tga.gov.au/resources/publication/publications/prescription-medicines-registration-new-generic-medicines-and-biosimilar-medicines-2017">"Prescription medicines: registration of new generic medicines and biosimilar medicines, 2017"</a>. <i>Therapeutic Goods Administration (TGA)</i>. 21 June 2022<span class="reference-accessdate">. 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Retrieved <span class="nowrap">16 August</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=RDC+N%C2%BA+784+%E2%80%93+Listas+de+Subst%C3%A2ncias+Entorpecentes%2C+Psicotr%C3%B3picas%2C+Precursoras+e+Outras+sob+Controle+Especial&amp;rft.pub=Di%C3%A1rio+Oficial+da+Uni%C3%A3o&amp;rft.date=2023-03-31&amp;rft.au=Anvisa&amp;rft_id=https%3A%2F%2Fwww.in.gov.br%2Fen%2Fweb%2Fdou%2F-%2Fresolucao-rdc-n-784-de-31-de-marco-de-2023-474904992&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-ReviaLabel-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-ReviaLabel_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-11"><sup><i><b>l</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-12"><sup><i><b>m</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-13"><sup><i><b>n</b></i></sup></a> <a href="#cite_ref-ReviaLabel_3-14"><sup><i><b>o</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dailymed.nlm.nih.gov/dailymed/archives/fdaDrugInfo.cfm?archiveid=172953">"Revia (naltrexone hydrochloride tablets USP50 mgOpioid Antagonist"</a>. <i>DailyMed</i>. 24 April 2015. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220614045520/https://dailymed.nlm.nih.gov/dailymed/archives/fdaDrugInfo.cfm?archiveid=172953">Archived</a> from the original on 14 June 2022<span class="reference-accessdate">. Retrieved <span class="nowrap">13 June</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=DailyMed&amp;rft.atitle=Revia+%28naltrexone+hydrochloride+tablets+USP50+mgOpioid+Antagonist&amp;rft.date=2015-04-24&amp;rft_id=https%3A%2F%2Fdailymed.nlm.nih.gov%2Fdailymed%2Farchives%2FfdaDrugInfo.cfm%3Farchiveid%3D172953&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-ContraveLabel-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-ContraveLabel_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ContraveLabel_4-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-ContraveLabel_4-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=485ff360-32c8-11df-928b-0002a5d5c51b">"Contrave Extended-Release – naltrexone hydrochloride and bupropion hydrochloride tablet, extended release"</a>. <i>DailyMed</i>. 4 November 2021. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200604190921/https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=485ff360-32c8-11df-928b-0002a5d5c51b">Archived</a> from the original on 4 June 2020<span class="reference-accessdate">. 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Retrieved <span class="nowrap">13 June</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=DailyMed&amp;rft.atitle=Vivitrol-+naltrexone+kit&amp;rft.date=2021-03-10&amp;rft_id=https%3A%2F%2Fdailymed.nlm.nih.gov%2Fdailymed%2FdrugInfo.cfm%3Fsetid%3Dcd11c435-b0f0-4bb9-ae78-60f101f3703f&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-pmid2836152-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-pmid2836152_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-11"><sup><i><b>l</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-12"><sup><i><b>m</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-13"><sup><i><b>n</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-14"><sup><i><b>o</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-15"><sup><i><b>p</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-16"><sup><i><b>q</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-17"><sup><i><b>r</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-18"><sup><i><b>s</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-19"><sup><i><b>t</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-20"><sup><i><b>u</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-21"><sup><i><b>v</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-22"><sup><i><b>w</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-23"><sup><i><b>x</b></i></sup></a> <a href="#cite_ref-pmid2836152_6-24"><sup><i><b>y</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFGonzalezBrogden1988" class="citation journal cs1">Gonzalez JP, Brogden RN (March 1988). 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title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=European+Addiction+Research&amp;rft.atitle=Naltrexone+in+the+Treatment+of+Broadly+Defined+Behavioral+Addictions%3A+A+Review+and+Meta-Analysis+of+Randomized+Controlled+Trials&amp;rft.volume=23&amp;rft.issue=4&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E204-%3C%2Fspan%3E210&amp;rft.date=2017&amp;rft_id=info%3Adoi%2F10.1159%2F000480539&amp;rft_id=info%3Apmid%2F28877518&amp;rft.aulast=Mouaffak&amp;rft.aufirst=F&amp;rft.au=Leite%2C+C&amp;rft.au=Hamzaoui%2C+S&amp;rft.au=Benyamina%2C+A&amp;rft.au=Laqueille%2C+X&amp;rft.au=Kebir%2C+O&amp;rft_id=https%3A%2F%2Fdoi.org%2F10.1159%252F000480539&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-39"><span class="mw-cite-backlink"><b><a href="#cite_ref-39">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFRyback2004" class="citation journal cs1">Ryback RS (July 2004). "Naltrexone in the treatment of adolescent sexual offenders". <i>The Journal of Clinical Psychiatry</i>. <b>65</b> (7): <span class="nowrap">982–</span>986. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.4088%2Fjcp.v65n0715">10.4088/jcp.v65n0715</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/15291688">15291688</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=The+Journal+of+Clinical+Psychiatry&amp;rft.atitle=Naltrexone+in+the+treatment+of+adolescent+sexual+offenders&amp;rft.volume=65&amp;rft.issue=7&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E982-%3C%2Fspan%3E986&amp;rft.date=2004-07&amp;rft_id=info%3Adoi%2F10.4088%2Fjcp.v65n0715&amp;rft_id=info%3Apmid%2F15291688&amp;rft.aulast=Ryback&amp;rft.aufirst=RS&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-Low_dose_naltrexone_-_MEpedia-40"><span class="mw-cite-backlink"><b><a href="#cite_ref-Low_dose_naltrexone_-_MEpedia_40-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://me-pedia.org/wiki/Low_dose_naltrexone">"Low dose naltrexone"</a>. MEpedia. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220924165641/https://me-pedia.org/wiki/Low_dose_naltrexone">Archived</a> from the original on 24 September 2022<span class="reference-accessdate">. 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Springer International Publishing. pp.&#160;88–. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-3-319-63040-3" title="Special:BookSources/978-3-319-63040-3"><bdi>978-3-319-63040-3</bdi></a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210427131539/https://books.google.com/books?id=wH86DwAAQBAJ&amp;pg=PA88">Archived</a> from the original on 27 April 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">4 December</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Substance+Use+Disorders%3A+A+Guide+for+the+Primary+Care+Provider&amp;rft.pages=88-&amp;rft.pub=Springer+International+Publishing&amp;rft.date=2017-10-17&amp;rft.isbn=978-3-319-63040-3&amp;rft.aulast=Milhorn&amp;rft.aufirst=HT&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DwH86DwAAQBAJ%26pg%3DPA88&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-MedicalNewsToday2006-43"><span class="mw-cite-backlink">^ <a href="#cite_ref-MedicalNewsToday2006_43-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-MedicalNewsToday2006_43-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">"<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20090105124047/http://www.medicalnewstoday.com/articles/41707.php">"Alcoholism Once A Month Injectable Drug, Vivitrol, Approved By FDA"</a>. <i>Medical News Today</i>. 16 April 2006. Archived from <a rel="nofollow" class="external text" href="http://www.medicalnewstoday.com/articles/41707.php">the original</a> on 5 January 2009.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Medical+News+Today&amp;rft.atitle=Alcoholism+Once+A+Month+Injectable+Drug%2C+Vivitrol%2C+Approved+By+FDA&amp;rft.date=2006-04-16&amp;rft_id=http%3A%2F%2Fwww.medicalnewstoday.com%2Farticles%2F41707.php&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-TGA-44"><span class="mw-cite-backlink"><b><a href="#cite_ref-TGA_44-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFTherapeutic_Goods_Administration" class="citation web cs1">Therapeutic Goods Administration. <a rel="nofollow" class="external text" href="https://www.ebs.tga.gov.au/ebs/ANZTPAR/PublicWeb.nsf/cuMedicines?OpenView">"Australian Register of Therapeutic Goods Medicines"</a> <span class="cs1-format">(Online database of approved medicines)</span>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20090514095145/https://www.ebs.tga.gov.au/ebs/ANZTPAR/PublicWeb.nsf/cuMedicines?OpenView">Archived</a> from the original on 14 May 2009<span class="reference-accessdate">. Retrieved <span class="nowrap">22 March</span> 2009</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Australian+Register+of+Therapeutic+Goods+Medicines&amp;rft.au=Therapeutic+Goods+Administration&amp;rft_id=https%3A%2F%2Fwww.ebs.tga.gov.au%2Febs%2FANZTPAR%2FPublicWeb.nsf%2FcuMedicines%3FOpenView&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-45"><span class="mw-cite-backlink"><b><a href="#cite_ref-45">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFTherapeutic_Goods_Administration" class="citation web cs1">Therapeutic Goods Administration. <a rel="nofollow" class="external text" href="https://www.ebs.tga.gov.au/servlet/xmlmillr6?dbid=ebs%2FPublicHTML%2FpdfStore.nsf&amp;docid=12AA89E8C8E53B46CA257FA7004211EE&amp;agid=(PrintDetailsPublic)&amp;actionid=1">"Australian Register of Therapeutic Goods Medicines"</a> <span class="cs1-format">(Online database of approved medicines, specific entry for "O'Neil Long Acting Naltrexone Implant")</span><span class="reference-accessdate">. Retrieved <span class="nowrap">27 April</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Australian+Register+of+Therapeutic+Goods+Medicines&amp;rft.au=Therapeutic+Goods+Administration&amp;rft_id=https%3A%2F%2Fwww.ebs.tga.gov.au%2Fservlet%2Fxmlmillr6%3Fdbid%3Debs%252FPublicHTML%252FpdfStore.nsf%26docid%3D12AA89E8C8E53B46CA257FA7004211EE%26agid%3D%28PrintDetailsPublic%29%26actionid%3D1&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span> <sup class="noprint Inline-Template"><span style="white-space: nowrap;">&#91;<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title="&#160;Dead link tagged October 2022">permanent dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">&#8205;</span>&#93;</span></sup></span> </li> <li id="cite_note-46"><span class="mw-cite-backlink"><b><a href="#cite_ref-46">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFHulseMorrisArnold-ReedTait2009" class="citation journal cs1">Hulse GK, Morris N, Arnold-Reed D, Tait RJ (October 2009). <a rel="nofollow" class="external text" href="https://doi.org/10.1001%2Farchgenpsychiatry.2009.130">"Improving clinical outcomes in treating heroin dependence: randomized, controlled trial of oral or implant naltrexone"</a>. <i>Archives of General Psychiatry</i>. <b>66</b> (10): <span class="nowrap">1108–</span>1115. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1001%2Farchgenpsychiatry.2009.130">10.1001/archgenpsychiatry.2009.130</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/19805701">19805701</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Archives+of+General+Psychiatry&amp;rft.atitle=Improving+clinical+outcomes+in+treating+heroin+dependence%3A+randomized%2C+controlled+trial+of+oral+or+implant+naltrexone&amp;rft.volume=66&amp;rft.issue=10&amp;rft.pages=%3Cspan+class%3D%22nowrap%22%3E1108-%3C%2Fspan%3E1115&amp;rft.date=2009-10&amp;rft_id=info%3Adoi%2F10.1001%2Farchgenpsychiatry.2009.130&amp;rft_id=info%3Apmid%2F19805701&amp;rft.aulast=Hulse&amp;rft.aufirst=GK&amp;rft.au=Morris%2C+N&amp;rft.au=Arnold-Reed%2C+D&amp;rft.au=Tait%2C+RJ&amp;rft_id=https%3A%2F%2Fdoi.org%2F10.1001%252Farchgenpsychiatry.2009.130&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-galanter-47"><span class="mw-cite-backlink"><b><a href="#cite_ref-galanter_47-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFGalanterKleber2008" class="citation book cs1">Galanter M, Kleber HD, eds. (2008). <i>The American Psychiatric Publishing Textbook of Substance Abuse Treatment</i>. American Psychiatric. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-58562-276-4" title="Special:BookSources/978-1-58562-276-4"><bdi>978-1-58562-276-4</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+American+Psychiatric+Publishing+Textbook+of+Substance+Abuse+Treatment&amp;rft.pub=American+Psychiatric&amp;rft.date=2008&amp;rft.isbn=978-1-58562-276-4&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span><sup class="noprint Inline-Template" style="white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="This citation requires a reference to the specific page or range of pages in which the material appears. (January 2017)">page&#160;needed</span></a></i>&#93;</sup></span> </li> <li id="cite_note-pmid12028745-48"><span class="mw-cite-backlink">^ <a href="#cite_ref-pmid12028745_48-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-pmid12028745_48-9"><sup><i><b>j</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFMiottoMcCannBaschRawson2002" class="citation journal cs1">Miotto K, McCann M, Basch J, Rawson R, Ling W (2002). 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Retrieved <span class="nowrap">4 December</span> 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Naltrexone&amp;rft_id=https%3A%2F%2Fwww.drugs.com%2Finternational%2Fnaltrexone.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-121"><span class="mw-cite-backlink"><b><a href="#cite_ref-121">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.drugs.com/mtm/bupropion-and-naltrexone.html">"Bupropion and naltrexone Uses, Side Effects &amp; Warnings"</a>. <i>Drugs.com</i>. 8 June 2020. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20201026105451/https://www.drugs.com/mtm/bupropion-and-naltrexone.html">Archived</a> from the original on 26 October 2020<span class="reference-accessdate">. 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Retrieved <span class="nowrap">6 January</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Current+Psychiatry+Reports&amp;rft.atitle=Pharmacotherapy+of+Sexual+Addiction&amp;rft.volume=22&amp;rft.issue=6&amp;rft.pages=30&amp;rft.date=2020-05&amp;rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A218527367%23id-name%3DS2CID&amp;rft_id=info%3Apmid%2F32377953&amp;rft_id=info%3Adoi%2F10.1007%2Fs11920-020-01153-4&amp;rft.aulast=Malandain&amp;rft.aufirst=L&amp;rft.au=Blanc%2C+JV&amp;rft.au=Ferreri%2C+F&amp;rft.au=Thibaut%2C+F&amp;rft_id=https%3A%2F%2Fhal.sorbonne-universite.fr%2Fhal-02880933%2Ffile%2FPharmacotherapy%2520of%2520Sexual%2520Addiction.pdf&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANaltrexone" class="Z3988"></span></span> </li> <li id="cite_note-155"><span class="mw-cite-backlink"><b><a href="#cite_ref-155">^</a></b></span> <span class="reference-text">Herron, Abigail J., Brennan, Tim K. eds. <i>ASAM Essentials of Addiction Medicine, The</i>. 3rd Edition. 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/> system</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Alcohol_intoxication" title="Alcohol intoxication">Alcohol intoxication</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Metadoxine" title="Metadoxine">Metadoxine</a></li> <li><a href="/wiki/Thiamine" title="Thiamine">Thiamine</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Barbiturate_overdose" title="Barbiturate overdose">Barbiturate<br /> overdose</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bemegride" title="Bemegride">Bemegride</a></li> <li><a href="/wiki/Etamivan" title="Etamivan">Ethamivan</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Benzodiazepine_overdose" title="Benzodiazepine overdose">Benzodiazepine<br /> overdose</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cyprodenate" title="Cyprodenate">Cyprodenate</a></li> <li><a href="/wiki/Flumazenil" title="Flumazenil">Flumazenil</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/GHB_overdose" class="mw-redirect" title="GHB overdose">GHB overdose</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Physostigmine" title="Physostigmine">Physostigmine</a></li> <li><a href="/wiki/SCH-50911" title="SCH-50911">SCH-50911</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Nerve_agent" title="Nerve agent">Nerve agent</a> /<br /> <a href="/wiki/Organophosphate_poisoning" title="Organophosphate poisoning">Organophosphate<br /> poisoning</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atropine" title="Atropine">Atropine</a><sup>#</sup></li> <li><a href="/wiki/Biperiden" title="Biperiden">Biperiden</a></li> <li><a href="/wiki/Diazepam" title="Diazepam">Diazepam</a><sup>#</sup></li> <li><a href="/wiki/Oxime" title="Oxime">Oximes</a> <ul><li><a href="/wiki/Obidoxime" title="Obidoxime">Obidoxime</a></li> <li><a href="/wiki/Pralidoxime" title="Pralidoxime">Pralidoxime</a></li></ul></li> <li><i>see also:</i> <a href="/wiki/Cholinesterase" title="Cholinesterase">Cholinesterase</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Opioid_overdose" title="Opioid overdose">Opioid overdose</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diprenorphine" title="Diprenorphine">Diprenorphine</a></li> <li><a href="/wiki/Doxapram" title="Doxapram">Doxapram</a></li> <li><a href="/wiki/Nalmefene" title="Nalmefene">Nalmefene</a></li> <li><a href="/wiki/Nalorphine" title="Nalorphine">Nalorphine</a></li> <li><a href="/wiki/Naloxone" title="Naloxone">Naloxone</a><sup>#</sup></li> <li><a class="mw-selflink selflink">Naltrexone</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Reversal of<br /> <a href="/wiki/Neuromuscular-blocking_drug" title="Neuromuscular-blocking drug">neuromuscular blockade</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sugammadex" title="Sugammadex">Sugammadex</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Circulatory_system" title="Circulatory system">Circulatory<br /> system</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Beta_blocker#Adverse_effects" title="Beta blocker">Beta blocker</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Glucagon" title="Glucagon">Glucagon</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Digoxin_toxicity" title="Digoxin toxicity">Digoxin toxicity</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Digoxin_immune_fab" title="Digoxin immune fab">Digoxin immune fab</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anticoagulant" title="Anticoagulant">Anticoagulants</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>against <a href="/wiki/Direct_Xa_inhibitor" class="mw-redirect" title="Direct Xa inhibitor">direct Xa inhibitors</a> (<a href="/wiki/Andexanet_alfa" title="Andexanet alfa">Andexanet alfa</a>)</li> <li>against <a href="/wiki/Heparin" title="Heparin">heparin</a> (<a href="/wiki/Protamine_sulfate" title="Protamine sulfate">Protamine</a><sup>#</sup>)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Arsenic_poisoning" title="Arsenic poisoning">Arsenic poisoning</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dimercaprol" title="Dimercaprol">Dimercaprol</a><sup>#</sup></li> <li><a href="/wiki/Dimercaptosuccinic_acid" class="mw-redirect" title="Dimercaptosuccinic acid">Succimer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cyanide_poisoning" title="Cyanide poisoning">Cyanide poisoning</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/4-Dimethylaminophenol" title="4-Dimethylaminophenol">4-Dimethylaminophenol</a></li> <li><a href="/wiki/Hydroxocobalamin" title="Hydroxocobalamin">Hydroxocobalamin</a></li> <li><i><a href="/wiki/Nitrite" title="Nitrite">nitrite</a></i> <ul><li><a href="/wiki/Amyl_nitrite" title="Amyl nitrite">Amyl nitrite</a></li> <li><a href="/wiki/Sodium_nitrite" title="Sodium nitrite">Sodium nitrite</a><sup>#</sup></li></ul></li> <li><a href="/wiki/Sodium_thiosulfate_(medical_use)" title="Sodium thiosulfate (medical use)">Sodium thiosulfate</a><sup>#</sup></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hydrofluoric_acid" title="Hydrofluoric acid">Hydrofluoric acid</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Calcium_gluconate" title="Calcium gluconate">Calcium gluconate</a><sup>#</sup></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Methanol" title="Methanol">Methanol</a> /<br /> <a href="/wiki/Ethylene_glycol_poisoning" title="Ethylene glycol poisoning">Ethylene glycol<br /> poisoning</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Primary alcohols: <a href="/wiki/Alcohol_(medicine)" class="mw-redirect" title="Alcohol (medicine)">Ethanol</a></li> <li><a href="/wiki/Fomepizole" title="Fomepizole">Fomepizole</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Paracetamol_poisoning" title="Paracetamol poisoning">Paracetamol toxicity</a><br /> (Acetaminophen)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Acetylcysteine" title="Acetylcysteine">Acetylcysteine</a><sup>#</sup></li> <li><a href="/wiki/Glutathione" title="Glutathione">Glutathione</a></li> <li><a href="/wiki/Methionine" title="Methionine">Methionine</a><sup>#</sup></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Toxic_metal" class="mw-redirect" title="Toxic metal">Toxic metals</a> (<a href="/wiki/Cadmium_poisoning" title="Cadmium poisoning">cadmium</a> <ul><li><a href="/wiki/Lead_poisoning" title="Lead poisoning">lead</a></li> <li><a href="/wiki/Mercury_poisoning" title="Mercury poisoning">mercury</a></li> <li><a href="/wiki/Thallium_poisoning" title="Thallium poisoning">thallium</a>)</li></ul></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <li><a href="/wiki/Dimercaprol" title="Dimercaprol">Dimercaprol</a><sup>#</sup></li> <li><a href="/wiki/Ethylenediaminetetraacetic_acid" title="Ethylenediaminetetraacetic acid">Edetates</a></li> <li><a href="/wiki/Prussian_blue" title="Prussian blue">Prussian blue</a><sup>#</sup></li> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Iodine-131" title="Iodine-131">iodine-131</a></i> <ul><li><a href="/wiki/Potassium_iodide" title="Potassium iodide">Potassium iodide</a></li></ul></li> <li><a href="/wiki/Methylene_blue" title="Methylene blue">Methylthioninium chloride</a><sup>#</sup></li> <li><i><a href="/wiki/Oxidizing_agent" title="Oxidizing agent">oxidizing agent</a></i> <ul><li><a href="/wiki/Potassium_permanganate" title="Potassium permanganate">Potassium permanganate</a></li></ul></li> <li><a href="/wiki/Prednisolone/promethazine" title="Prednisolone/promethazine">Prednisolone/promethazine</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Emetic" class="mw-redirect" title="Emetic">Emetic</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Copper(II)_sulfate" title="Copper(II) sulfate">Copper sulfate</a></li> <li><a href="/wiki/Psychotria_ipecacuanha" class="mw-redirect" title="Psychotria ipecacuanha">Ipecacuanha</a> <ul><li><a href="/wiki/Syrup_of_ipecac" title="Syrup of ipecac">Syrup of ipecac</a></li></ul></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="background: transparent; padding: 0px;"><div><div class="hlist"> <ul><li><sup>#</sup><a href="/wiki/WHO_Model_List_of_Essential_Medicines" title="WHO Model List of Essential Medicines">WHO-EM</a></li> <li><sup>‡</sup><a href="/wiki/List_of_withdrawn_drugs" title="List of withdrawn drugs">Withdrawn</a> from market</li> <li><a href="/wiki/Clinical_trial" title="Clinical trial">Clinical trials</a>: <ul><li><sup>†</sup><a href="/wiki/Phases_of_clinical_research#Phase_III" title="Phases of clinical research">Phase III</a></li> <li><sup>§</sup>Never to phase III</li></ul></li></ul> </div></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="Opioid_receptor_modulators225" style="padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Opioid_receptor_modulators" title="Template:Opioid receptor modulators"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Opioid_receptor_modulators" title="Template talk:Opioid receptor modulators"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Opioid_receptor_modulators" title="Special:EditPage/Template:Opioid receptor modulators"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Opioid_receptor_modulators225" style="font-size:114%;margin:0 4em"><a href="/wiki/Opioid_receptor" title="Opioid receptor">Opioid receptor</a> <a href="/wiki/Receptor_modulator" title="Receptor modulator">modulators</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;"><a href="/wiki/%CE%9C-opioid_receptor" title="Μ-opioid receptor">μ-opioid</a><br />(MOR)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Agonists(abridged;full_list)67" scope="row" class="navbox-group" style="width:1%">Agonists<br />(abridged;<br /><a href="/wiki/List_of_opioids" title="List of opioids">full list</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/3-HO-PCP" title="3-HO-PCP">3-HO-PCP</a></li> <li><a href="/w/index.php?title=7-Acetoxymitragynine&amp;action=edit&amp;redlink=1" class="new" title="7-Acetoxymitragynine (page does not exist)">7-Acetoxymitragynine</a></li> <li><a href="/wiki/7-Hydroxymitragynine" title="7-Hydroxymitragynine">7-Hydroxymitragynine</a></li> <li><a href="/w/index.php?title=%CE%A8-Akuammigine&amp;action=edit&amp;redlink=1" class="new" title="Ψ-Akuammigine (page does not exist)">ψ-Akuammigine</a></li> <li><a href="/wiki/Chlornaltrexamine" class="mw-redirect" title="Chlornaltrexamine">α-Chlornaltrexamine</a></li> <li><a href="/w/index.php?title=Alpha-Narcotine&amp;action=edit&amp;redlink=1" class="new" title="Alpha-Narcotine (page does not exist)">α-Narcotine</a></li> <li><a href="/wiki/Acetyldihydrocodeine" title="Acetyldihydrocodeine">Acetyldihydrocodeine</a></li> <li><a href="/wiki/Acetylfentanyl" title="Acetylfentanyl">Acetylfentanyl</a></li> <li><a href="/wiki/Acrylfentanyl" title="Acrylfentanyl">Acrylfentanyl</a></li> <li><a href="/wiki/Adrenorphin" title="Adrenorphin">Adrenorphin (metorphamide)</a></li> <li><a href="/wiki/AH-7921" title="AH-7921">AH-7921</a></li> <li><a href="/wiki/Akuammicine" title="Akuammicine">Akuammicine</a></li> <li><a href="/w/index.php?title=Akuammidine&amp;action=edit&amp;redlink=1" class="new" title="Akuammidine (page does not exist)">Akuammidine</a></li> <li><a href="/wiki/Alfentanil" title="Alfentanil">Alfentanil</a></li> <li><a href="/wiki/Anileridine" title="Anileridine">Anileridine</a></li> <li><a href="/wiki/Apparicine" title="Apparicine">Apparicine</a></li> <li><a href="/wiki/Beta-Endorphin" class="mw-redirect" title="Beta-Endorphin">β-Endorphin</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-12P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-12P (page does not exist)">BAM-12P</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-18P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-18P (page does not exist)">BAM-18P</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-22P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-22P (page does not exist)">BAM-22P</a></li> <li><a href="/wiki/Benzhydrocodone" title="Benzhydrocodone">Benzhydrocodone</a></li> <li><a href="/wiki/Benzylmorphine" title="Benzylmorphine">Benzylmorphine</a></li> <li><a href="/wiki/Bezitramide" title="Bezitramide">Bezitramide</a></li> <li><a href="/wiki/Biphalin" title="Biphalin">Biphalin</a></li> <li><a href="/w/index.php?title=BU08070&amp;action=edit&amp;redlink=1" class="new" title="BU08070 (page does not exist)">BU08070</a></li> <li><a href="/wiki/Buprenorphine" title="Buprenorphine">Buprenorphine</a></li> <li><a href="/wiki/Butorphan" class="mw-redirect" title="Butorphan">Butorphan</a></li> <li><a href="/wiki/Butorphanol" title="Butorphanol">Butorphanol</a></li> <li><a href="/wiki/Butyrfentanyl" title="Butyrfentanyl">Butyrfentanyl</a></li> <li><a href="/wiki/BW373U86" title="BW373U86">BW373U86</a></li> <li><a href="/wiki/Carfentanil" title="Carfentanil">Carfentanil</a></li> <li><a href="/wiki/Casokefamide" title="Casokefamide">Casokefamide</a></li> <li><a href="/wiki/Cebranopadol" title="Cebranopadol">Cebranopadol</a></li> <li><a href="/wiki/Chloroxymorphamine" title="Chloroxymorphamine">Chloroxymorphamine</a></li> <li><a href="/wiki/Codeine" title="Codeine">Codeine</a></li> <li><a href="/wiki/DADLE" title="DADLE">DADLE</a></li> <li><a href="/wiki/DAMGO" title="DAMGO">DAMGO (DAGO)</a></li> <li><a href="/wiki/Dermorphin" title="Dermorphin">Dermorphin</a></li> <li><a href="/wiki/Desmetramadol" title="Desmetramadol">Desmetramadol</a> (desmethyltramadol)</li> <li><a href="/wiki/Desomorphine" title="Desomorphine">Desomorphine</a></li> <li><a href="/wiki/Deumitragynine" class="mw-redirect" title="Deumitragynine">Deumitragynine</a></li> <li><a href="/wiki/Dextromoramide" title="Dextromoramide">Dextromoramide</a></li> <li><a href="/wiki/Dextropropoxyphene" title="Dextropropoxyphene">Dextropropoxyphene</a> (propoxyphene)</li> <li><a href="/wiki/Dezocine" title="Dezocine">Dezocine</a></li> <li><a href="/wiki/Dimenoxadol" title="Dimenoxadol">Dimenoxadol</a></li> <li><a href="/wiki/Dimethylaminopivalophenone" title="Dimethylaminopivalophenone">Dimethylaminopivalophenone</a></li> <li><a href="/wiki/Eluxadoline" title="Eluxadoline">Eluxadoline</a></li> <li><a href="/wiki/Heroin" title="Heroin">Diamorphine</a> (heroin)</li> <li><a href="/wiki/Dihydrocodeine" title="Dihydrocodeine">Dihydrocodeine</a></li> <li><a href="/wiki/Dihydroetorphine" title="Dihydroetorphine">Dihydroetorphine</a></li> <li><a href="/wiki/Dihydromorphine" title="Dihydromorphine">Dihydromorphine</a></li> <li><a href="/wiki/Dinalbuphine_sebacate" title="Dinalbuphine sebacate">Dinalbuphine sebacate</a></li> <li><a href="/wiki/Diphenoxylate" title="Diphenoxylate">Diphenoxylate</a></li> <li><a href="/wiki/Dipipanone" title="Dipipanone">Dipipanone</a></li> <li><a href="/wiki/Dynorphin_A" title="Dynorphin A">Dynorphin A</a></li> <li><a href="/wiki/Embutramide" title="Embutramide">Embutramide</a></li> <li><a href="/wiki/Endomorphin-1" title="Endomorphin-1">Endomorphin-1</a></li> <li><a href="/wiki/Endomorphin-2" title="Endomorphin-2">Endomorphin-2</a></li> <li><a href="/wiki/Eseroline" title="Eseroline">Eseroline</a></li> <li><a href="/wiki/Ethylmorphine" title="Ethylmorphine">Ethylmorphine</a></li> <li><a href="/wiki/Etorphine" title="Etorphine">Etorphine</a></li> <li><a href="/wiki/Fentanyl" title="Fentanyl">Fentanyl</a></li> <li><a href="/wiki/Fluorophen" title="Fluorophen">Fluorophen</a></li> <li><a href="/wiki/Frakefamide" title="Frakefamide">Frakefamide</a></li> <li><a href="/wiki/Furanylfentanyl" title="Furanylfentanyl">Furanylfentanyl</a></li> <li><a href="/wiki/Hemorphin-4" title="Hemorphin-4">Hemorphin-4</a></li> <li><a href="/wiki/Herkinorin" title="Herkinorin">Herkinorin</a></li> <li><a href="/wiki/Hodgkinsine" title="Hodgkinsine">Hodgkinsine</a></li> <li><a href="/wiki/Hydrocodone" title="Hydrocodone">Hydrocodone</a></li> <li><a href="/wiki/Hydromorphinol" title="Hydromorphinol">Hydromorphinol</a></li> <li><a href="/wiki/Hydromorphone" title="Hydromorphone">Hydromorphone</a></li> <li><a href="/wiki/IBNtxA" title="IBNtxA">IBNtxA</a></li> <li><a href="/wiki/Ketamine" title="Ketamine">Ketamine</a></li> <li><a href="/wiki/Ketobemidone" title="Ketobemidone">Ketobemidone</a></li> <li><a href="/wiki/Mitragyna_speciosa" title="Mitragyna speciosa">Kratom</a></li> <li><a href="/wiki/Laudanosine" title="Laudanosine">Laudanosine</a></li> <li><a href="/wiki/Lefetamine" title="Lefetamine">Lefetamine</a></li> <li><a href="/wiki/Leu-enkephalin" title="Leu-enkephalin">Leu-enkephalin</a></li> <li><a href="/wiki/Levacetylmethadol" title="Levacetylmethadol">Levacetylmethadol</a></li> <li><a href="/wiki/Levomethorphan" title="Levomethorphan">Levomethorphan</a></li> <li><a href="/wiki/Levorphanol" title="Levorphanol">Levorphanol</a></li> <li><a href="/w/index.php?title=Lexanopadol&amp;action=edit&amp;redlink=1" class="new" title="Lexanopadol (page does not exist)">Lexanopadol</a></li> <li><a href="/wiki/Loperamide" title="Loperamide">Loperamide</a></li> <li><a href="/wiki/Loxicodegol" class="mw-redirect" title="Loxicodegol">Loxicodegol</a></li> <li><a href="/wiki/LS-115509" title="LS-115509">LS-115509</a></li> <li><a href="/wiki/Matrine" title="Matrine">Matrine</a></li> <li><a href="/wiki/Meptazinol" title="Meptazinol">Meptazinol</a></li> <li><a href="/wiki/Met-enkephalin" title="Met-enkephalin">Met-enkephalin</a> (metenkefalin)</li> <li><a href="/wiki/Methadone" title="Methadone">Methadone</a></li> <li><a href="/wiki/Metkefamide" title="Metkefamide">Metkefamide</a></li> <li><a href="/wiki/Metopon" title="Metopon">Metopon</a></li> <li><a href="/wiki/Mitragynine" title="Mitragynine">Mitragynine</a></li> <li><a href="/wiki/Mitragynine_pseudoindoxyl" title="Mitragynine pseudoindoxyl">Mitragynine pseudoindoxyl</a></li> <li><a href="/wiki/Morphiceptin" title="Morphiceptin">Morphiceptin</a></li> <li><a href="/wiki/Morphine" title="Morphine">Morphine</a></li> <li><a href="/wiki/Nalbuphine" title="Nalbuphine">Nalbuphine</a></li> <li><a href="/w/index.php?title=Naloxone_benzoylhydrazone&amp;action=edit&amp;redlink=1" class="new" title="Naloxone benzoylhydrazone (page does not exist)">Naloxone benzoylhydrazone</a> (NalBzOH)</li> <li><a href="/wiki/Nalmexone" title="Nalmexone">Nalmexone</a></li> <li><a href="/wiki/Naltalimide" title="Naltalimide">Naltalimide</a></li> <li><a href="/w/index.php?title=Neopine&amp;action=edit&amp;redlink=1" class="new" title="Neopine (page does not exist)">Neopine</a></li> <li><a href="/wiki/NFEPP" title="NFEPP">NFEPP</a></li> <li><a href="/wiki/Nicocodeine" title="Nicocodeine">Nicocodeine</a></li> <li><a href="/wiki/Nicodicodine" title="Nicodicodine">Nicodicodine</a></li> <li><a href="/wiki/Nicomorphine" title="Nicomorphine">Nicomorphine</a></li> <li><a href="/wiki/Norketamine" title="Norketamine">Norketamine</a></li> <li><a href="/wiki/Nufenoxole" title="Nufenoxole">Nufenoxole</a></li> <li><a href="/wiki/Octreotide" title="Octreotide">Octreotide</a></li> <li><a href="/wiki/Oliceridine" title="Oliceridine">Oliceridine</a></li> <li><a href="/wiki/Oxycodegol" title="Oxycodegol">Oxycodegol</a></li> <li><a href="/wiki/Oxymorphone-3-methoxynaltrexonazine" title="Oxymorphone-3-methoxynaltrexonazine">Oxymorphone-3-methoxynaltrexonazine</a> (OM-3-MNZ)</li> <li><a href="/wiki/Oripavine" title="Oripavine">Oripavine</a></li> <li><a href="/wiki/Oxycodone" title="Oxycodone">Oxycodone</a></li> <li><a href="/wiki/Oxymorphazone" title="Oxymorphazone">Oxymorphazone</a></li> <li><a href="/w/index.php?title=Oxymorphonazine&amp;action=edit&amp;redlink=1" class="new" title="Oxymorphonazine (page does not exist)">Oxymorphonazine</a></li> <li><a href="/wiki/Oxymorphone" title="Oxymorphone">Oxymorphone</a></li> <li><a href="/w/index.php?title=Oxymorphone_phenylhydrazone&amp;action=edit&amp;redlink=1" class="new" title="Oxymorphone phenylhydrazone (page does not exist)">Oxymorphone phenylhydrazone</a></li> <li><a href="/w/index.php?title=Oxymorphone_p-nitrophenylhydrazone&amp;action=edit&amp;redlink=1" class="new" title="Oxymorphone p-nitrophenylhydrazone (page does not exist)">OxyPNPH</a></li> <li><i><a href="/wiki/Papaver_somniferum" title="Papaver somniferum">Papaver somniferum</a></i> (<a href="/wiki/Opium" title="Opium">opium</a>)</li> <li><a href="/wiki/Pentazocine" title="Pentazocine">Pentazocine</a></li> <li><a href="/wiki/Pericine" title="Pericine">Pericine</a></li> <li><a href="/wiki/Pethidine" title="Pethidine">Pethidine (meperidine)</a></li> <li><a href="/wiki/Phenazocine" title="Phenazocine">Phenazocine</a></li> <li><a href="/wiki/Phencyclidine" title="Phencyclidine">Phencyclidine</a></li> <li><a href="/wiki/Piminodine" title="Piminodine">Piminodine</a></li> <li><a href="/wiki/Piritramide" title="Piritramide">Piritramide</a></li> <li><a href="/w/index.php?title=PL-017&amp;action=edit&amp;redlink=1" class="new" title="PL-017 (page does not exist)">PL-017</a></li> <li><a href="/wiki/Prodine" title="Prodine">Prodine</a></li> <li><a href="/wiki/Propiram" title="Propiram">Propiram</a></li> <li><a href="/wiki/PZM21" title="PZM21">PZM21</a></li> <li><a href="/wiki/Methorphan" title="Methorphan">Racemethorphan</a></li> <li><a href="/wiki/Racemorphan" title="Racemorphan">Racemorphan</a></li> <li><a href="/wiki/Remifentanil" title="Remifentanil">Remifentanil</a></li> <li><a href="/wiki/Salsolinol" title="Salsolinol">Salsolinol</a></li> <li><a href="/wiki/SC-17599" title="SC-17599">SC-17599</a></li> <li><a href="/wiki/Sinomenine" title="Sinomenine">Sinomenine</a></li> <li><a href="/wiki/Sufentanil" title="Sufentanil">Sufentanil</a></li> <li><a href="/wiki/Tapentadol" title="Tapentadol">Tapentadol</a></li> <li><a href="/wiki/Tetrahydropapaveroline" title="Tetrahydropapaveroline">Tetrahydropapaveroline</a></li> <li><a href="/wiki/TH-030418" title="TH-030418">TH-030418</a></li> <li><a href="/wiki/Thebaine" title="Thebaine">Thebaine</a></li> <li><a href="/wiki/Thienorphine" title="Thienorphine">Thienorphine</a></li> <li><a href="/wiki/Tianeptine" title="Tianeptine">Tianeptine</a></li> <li><a href="/wiki/Tilidine" title="Tilidine">Tilidine</a></li> <li><a href="/wiki/Tramadol" title="Tramadol">Tramadol</a></li> <li><a href="/wiki/Trimebutine" title="Trimebutine">Trimebutine</a></li> <li><a href="/wiki/TRIMU_5" title="TRIMU 5">TRIMU 5</a></li> <li><a href="/wiki/TRV734" title="TRV734">TRV734</a></li> <li><a href="/w/index.php?title=Tubotaiwine&amp;action=edit&amp;redlink=1" class="new" title="Tubotaiwine (page does not exist)">Tubotaiwine</a></li> <li><a href="/wiki/U-47700" title="U-47700">U-47700</a></li> <li><a href="/wiki/Valorphin" title="Valorphin">Valorphin</a></li> <li><a href="/wiki/Viminol" title="Viminol">Viminol</a></li> <li><a href="/wiki/Xorphanol" title="Xorphanol">Xorphanol</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Antagonists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Picenadol" title="Picenadol">(3S,4S)-Picenadol</a></li> <li><a href="/wiki/Viminol" title="Viminol">2-(S)-N,N-(R)-Viminol</a></li> <li><a href="/w/index.php?title=3CS-nalmefene&amp;action=edit&amp;redlink=1" class="new" title="3CS-nalmefene (page does not exist)">3CS-nalmefene</a></li> <li><a href="/wiki/4-Caffeoyl-1,5-quinide" title="4-Caffeoyl-1,5-quinide">4-Caffeoyl-1,5-quinide</a></li> <li><a href="/wiki/4%E2%80%B2-Hydroxyflavanone" class="mw-redirect" title="4′-Hydroxyflavanone">4′-Hydroxyflavanone</a></li> <li><a href="/wiki/4%27,7-Dihydroxyflavone" title="4&#39;,7-Dihydroxyflavone">4',7-Dihydroxyflavone</a></li> <li><a href="/wiki/6%CE%B2-Naltrexol" title="6β-Naltrexol">6β-Naltrexol</a></li> <li><a href="/wiki/6%CE%B2-Naltrexol-d4" title="6β-Naltrexol-d4">6β-Naltrexol-d4</a></li> <li><a href="/wiki/18-Methoxycoronaridine" title="18-Methoxycoronaridine">18-MC</a></li> <li><a href="/wiki/Alpha-Gliadin" class="mw-redirect" title="Alpha-Gliadin">α-Gliadin</a></li> <li><a href="/wiki/Chlornaltrexamine" class="mw-redirect" title="Chlornaltrexamine">β-Chlornaltrexamine</a></li> <li><a href="/wiki/Beta-Funaltrexamine" class="mw-redirect" title="Beta-Funaltrexamine">β-Funaltrexamine</a></li> <li><a href="/wiki/Akuammine" title="Akuammine">Akuammine</a></li> <li><a href="/wiki/Alvimopan" title="Alvimopan">Alvimopan</a></li> <li><a href="/wiki/AM-251_(drug)" title="AM-251 (drug)">AM-251</a></li> <li><a href="/wiki/Apigenin" title="Apigenin">Apigenin</a></li> <li><a href="/wiki/AT-076" title="AT-076">AT-076</a></li> <li><a href="/wiki/Axelopran" title="Axelopran">Axelopran</a></li> <li><a href="/wiki/Bevenopran" title="Bevenopran">Bevenopran</a></li> <li><a href="/wiki/Catechin" title="Catechin">Catechin</a></li> <li><a href="/wiki/Epicatechin_gallate" title="Epicatechin gallate">Catechin gallate</a></li> <li><a href="/wiki/Clocinnamox" title="Clocinnamox">Clocinnamox</a></li> <li>CTAP</li> <li><a href="/w/index.php?title=CTOP&amp;action=edit&amp;redlink=1" class="new" title="CTOP (page does not exist)">CTOP</a></li> <li><a href="/w/index.php?title=Cyclofoxy&amp;action=edit&amp;redlink=1" class="new" title="Cyclofoxy (page does not exist)">Cyclofoxy</a></li> <li><a href="/wiki/Cyprodime" title="Cyprodime">Cyprodime</a></li> <li><a href="/wiki/Diacetylnalorphine" title="Diacetylnalorphine">Diacetylnalorphine</a></li> <li><a href="/wiki/Diprenorphine" title="Diprenorphine">Diprenorphine</a></li> <li><a href="/wiki/Epicatechin_gallate" title="Epicatechin gallate">ECG</a></li> <li><a href="/wiki/Gallocatechol" title="Gallocatechol">EGC</a></li> <li><a href="/wiki/Epicatechin" class="mw-redirect" title="Epicatechin">Epicatechin</a></li> <li><a href="/wiki/Eptazocine" title="Eptazocine">Eptazocine</a></li> <li><a href="/wiki/Gemazocine" title="Gemazocine">Gemazocine</a></li> <li><a href="/w/index.php?title=Ginsenoside_R&amp;action=edit&amp;redlink=1" class="new" title="Ginsenoside R (page does not exist)">Ginsenoside R</a></li> <li><a href="/wiki/Hyperoside" title="Hyperoside">Hyperoside</a></li> <li><a href="/wiki/Ibogaine" title="Ibogaine">Ibogaine</a></li> <li><a href="/wiki/JDTic" title="JDTic">JDTic</a></li> <li><a href="/wiki/Levallorphan" title="Levallorphan">Levallorphan</a></li> <li><a href="/wiki/Lobeline" title="Lobeline">Lobeline</a></li> <li><a href="/wiki/LY-255582" title="LY-255582">LY-255582</a></li> <li><a href="/wiki/LY-2196044" class="mw-redirect" title="LY-2196044">LY-2196044</a></li> <li><a href="/wiki/Methocinnamox" title="Methocinnamox">Methocinnamox</a></li> <li><a href="/wiki/Methylnaltrexone" title="Methylnaltrexone">Methylnaltrexone</a></li> <li><a href="/w/index.php?title=Methylsamidorphan_chloride&amp;action=edit&amp;redlink=1" class="new" title="Methylsamidorphan chloride (page does not exist)">Methylsamidorphan chloride</a></li> <li><a href="/wiki/Naldemedine" title="Naldemedine">Naldemedine</a></li> <li><a href="/wiki/Nalmefene" title="Nalmefene">Nalmefene</a></li> <li><a href="/wiki/Nalodeine" title="Nalodeine">Nalodeine (N-allylnorcodeine)</a></li> <li><a href="/wiki/Nalorphine" title="Nalorphine">Nalorphine</a></li> <li><a href="/wiki/Nalorphine_dinicotinate" title="Nalorphine dinicotinate">Nalorphine dinicotinate</a></li> <li><a href="/wiki/Naloxazone" title="Naloxazone">Naloxazone</a></li> <li><a href="/wiki/Naloxegol" title="Naloxegol">Naloxegol</a></li> <li><a href="/wiki/Naloxol" title="Naloxol">Naloxol</a></li> <li><a href="/wiki/Naloxonazine" title="Naloxonazine">Naloxonazine</a></li> <li><a href="/wiki/Naloxone" title="Naloxone">Naloxone</a></li> <li><a href="/w/index.php?title=Naltrexazone&amp;action=edit&amp;redlink=1" class="new" title="Naltrexazone (page does not exist)">Naltrexazone</a></li> <li><a href="/w/index.php?title=Naltrexonazine&amp;action=edit&amp;redlink=1" class="new" title="Naltrexonazine (page does not exist)">Naltrexonazine</a></li> <li><a class="mw-selflink selflink">Naltrexone</a></li> <li><a href="/wiki/Naltrindole" title="Naltrindole">Naltrindole</a></li> <li><a href="/wiki/Naringenin" title="Naringenin">Naringenin</a></li> <li><a href="/wiki/Noribogaine" title="Noribogaine">Noribogaine</a></li> <li><a href="/wiki/Oxilorphan" title="Oxilorphan">Oxilorphan</a></li> <li><a href="/wiki/Pawhuskin_A" title="Pawhuskin A">Pawhuskin A</a></li> <li><a href="/wiki/Rimonabant" title="Rimonabant">Rimonabant</a></li> <li><a href="/wiki/Quadazocine" title="Quadazocine">Quadazocine</a></li> <li><a href="/wiki/Samidorphan" title="Samidorphan">Samidorphan</a></li> <li><a href="/wiki/Taxifolin" title="Taxifolin">Taxifolin</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;"><a href="/wiki/%CE%94-opioid_receptor" title="Δ-opioid receptor">δ-opioid</a><br />(DOR)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Agonists</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=3CS-nalmefene&amp;action=edit&amp;redlink=1" class="new" title="3CS-nalmefene (page does not exist)">3CS-nalmefene</a></li> <li><a href="/wiki/6%27-Guanidinonaltrindole" title="6&#39;-Guanidinonaltrindole">6'-GNTI</a></li> <li><a href="/wiki/7-Spiroindanyloxymorphone" title="7-Spiroindanyloxymorphone">7-SIOM</a></li> <li><a href="/wiki/ADL-5747" title="ADL-5747">ADL-5747 (PF-04856881)</a></li> <li><a href="/wiki/ADL-5859" title="ADL-5859">ADL-5859</a></li> <li><a href="/wiki/Alazocine" title="Alazocine">Alazocine (SKF-10047)</a></li> <li><a href="/wiki/Amoxapine" title="Amoxapine">Amoxapine</a></li> <li><a href="/wiki/ARM390" title="ARM390">AR-M100390 (ARM390)</a></li> <li><a href="/wiki/AZD2327" class="mw-redirect" title="AZD2327">AZD2327</a></li> <li><a href="/wiki/Beta-Endorphin" class="mw-redirect" title="Beta-Endorphin">β-Endorphin</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-18P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-18P (page does not exist)">BAM-18P</a></li> <li><a href="/wiki/Biphalin" title="Biphalin">Biphalin</a></li> <li><a href="/wiki/BU-48" title="BU-48">BU-48</a></li> <li><a href="/wiki/Butorphan" class="mw-redirect" title="Butorphan">Butorphan</a></li> <li><a href="/wiki/Butorphanol" title="Butorphanol">Butorphanol</a></li> <li><a href="/wiki/BW373U86" title="BW373U86">BW373U86</a></li> <li><a href="/wiki/Casokefamide" title="Casokefamide">Casokefamide</a></li> <li><a href="/wiki/Cebranopadol" title="Cebranopadol">Cebranopadol</a></li> <li><a href="/wiki/Codeine" title="Codeine">Codeine</a></li> <li><a href="/wiki/Cyclazocine" title="Cyclazocine">Cyclazocine</a></li> <li><a href="/wiki/DADLE" title="DADLE">DADLE</a></li> <li><a href="/wiki/Deltorphin" title="Deltorphin">Deltorphin A</a></li> <li><a href="/wiki/Deltorphin_I" title="Deltorphin I">Deltorphin I</a></li> <li><a href="/w/index.php?title=Deltorphin_II&amp;action=edit&amp;redlink=1" class="new" title="Deltorphin II (page does not exist)">Deltorphin II</a></li> <li><a href="/wiki/Desmethylclozapine" title="Desmethylclozapine">Desmethylclozapine</a></li> <li><a href="/wiki/Desmetramadol" title="Desmetramadol">Desmetramadol (desmethyltramadol)</a></li> <li><a href="/wiki/Dezocine" title="Dezocine">Dezocine</a></li> <li><a href="/wiki/Heroin" title="Heroin">Diamorphine (heroin)</a></li> <li><a href="/wiki/Dihydroetorphine" title="Dihydroetorphine">Dihydroetorphine</a></li> <li><a href="/wiki/Dihydromorphine" title="Dihydromorphine">Dihydromorphine</a></li> <li><a href="/wiki/DPDPE" title="DPDPE">DPDPE</a></li> <li><a href="/wiki/DPI-221" title="DPI-221">DPI-221</a></li> <li><a href="/wiki/DPI-3290" title="DPI-3290">DPI-3290</a></li> <li><a href="/w/index.php?title=(D-Ser2,_Leu5,_Thr6)-Enkephalin&amp;action=edit&amp;redlink=1" class="new" title="(D-Ser2, Leu5, Thr6)-Enkephalin (page does not exist)">DSLET</a></li> <li><a href="/wiki/Ethylketazocine" title="Ethylketazocine">Ethylketazocine</a></li> <li><a href="/wiki/Etorphine" title="Etorphine">Etorphine</a></li> <li><a href="/wiki/Fentanyl" title="Fentanyl">Fentanyl</a></li> <li><a href="/w/index.php?title=Fentanyl_isothiocyanate&amp;action=edit&amp;redlink=1" class="new" title="Fentanyl isothiocyanate (page does not exist)">FIT</a></li> <li><a href="/wiki/Fluorophen" title="Fluorophen">Fluorophen</a></li> <li><a href="/wiki/Hemorphin-4" title="Hemorphin-4">Hemorphin-4</a></li> <li><a href="/wiki/Hydrocodone" title="Hydrocodone">Hydrocodone</a></li> <li><a href="/wiki/Hydromorphone" title="Hydromorphone">Hydromorphone</a></li> <li><a href="/wiki/Ibogaine" title="Ibogaine">Ibogaine</a></li> <li><a href="/wiki/Isomethadone" title="Isomethadone">Isomethadone</a></li> <li><a href="/wiki/JNJ-20788560" title="JNJ-20788560">JNJ-20788560</a></li> <li><a href="/wiki/KNT-127" title="KNT-127">KNT-127</a></li> <li><a href="/wiki/Mitragyna_speciosa" title="Mitragyna speciosa">Kratom</a></li> <li><a href="/wiki/Laudanosine" title="Laudanosine">Laudanosine</a></li> <li><a href="/wiki/Leu-enkephalin" title="Leu-enkephalin">Leu-enkephalin</a></li> <li><a href="/wiki/Levomethorphan" title="Levomethorphan">Levomethorphan</a></li> <li><a href="/wiki/Levorphanol" title="Levorphanol">Levorphanol</a></li> <li><a href="/w/index.php?title=Lexanopadol&amp;action=edit&amp;redlink=1" class="new" title="Lexanopadol (page does not exist)">Lexanopadol</a></li> <li><a href="/wiki/Lofentanil" title="Lofentanil">Lofentanil</a></li> <li><a href="/wiki/Met-enkephalin" title="Met-enkephalin">Met-enkephalin (metenkefalin)</a></li> <li><a href="/wiki/Metazocine" title="Metazocine">Metazocine</a></li> <li><a href="/wiki/Metkefamide" title="Metkefamide">Metkefamide</a></li> <li><a href="/wiki/Mitragynine" title="Mitragynine">Mitragynine</a></li> <li><a href="/wiki/Mitragynine_pseudoindoxyl" title="Mitragynine pseudoindoxyl">Mitragynine pseudoindoxyl</a></li> <li><a href="/wiki/Morphine" title="Morphine">Morphine</a></li> <li><a href="/wiki/N-Phenethyl-14-ethoxymetopon" title="N-Phenethyl-14-ethoxymetopon">N-Phenethyl-14-ethoxymetopon</a></li> <li><a href="/wiki/Norbuprenorphine" title="Norbuprenorphine">Norbuprenorphine</a></li> <li><a href="/w/index.php?title=Naloxone_benzoylhydrazone&amp;action=edit&amp;redlink=1" class="new" title="Naloxone benzoylhydrazone (page does not exist)">NalBzOH</a></li> <li><a href="/wiki/Oripavine" title="Oripavine">Oripavine</a></li> <li><a href="/wiki/Oxycodone" title="Oxycodone">Oxycodone</a></li> <li><a href="/wiki/Oxymorphone" title="Oxymorphone">Oxymorphone</a></li> <li><a href="/wiki/Pethidine" title="Pethidine">Pethidine (meperidine)</a></li> <li><a href="/wiki/Proglumide" title="Proglumide">Proglumide</a></li> <li><a href="/wiki/Methorphan" title="Methorphan">Racemethorphan</a></li> <li><a href="/wiki/Racemorphan" title="Racemorphan">Racemorphan</a></li> <li><a href="/wiki/RWJ-394674" title="RWJ-394674">RWJ-394674</a></li> <li><a href="/wiki/Samidorphan" title="Samidorphan">Samidorphan</a></li> <li><a href="/w/index.php?title=SB-235863&amp;action=edit&amp;redlink=1" class="new" title="SB-235863 (page does not exist)">SB-235863</a></li> <li><a href="/wiki/SNC-80" title="SNC-80">SNC-80</a></li> <li><a href="/w/index.php?title=SNC-162&amp;action=edit&amp;redlink=1" class="new" title="SNC-162 (page does not exist)">SNC-162</a></li> <li><a href="/wiki/TAN-67" title="TAN-67">TAN-67 (SB-205,607)</a></li> <li><a href="/wiki/TH-030418" title="TH-030418">TH-030418</a></li> <li><a href="/wiki/Thebaine" title="Thebaine">Thebaine</a></li> <li><a href="/wiki/C-8813" title="C-8813">Thiobromadol (C-8813)</a></li> <li><a href="/wiki/Tonazocine" title="Tonazocine">Tonazocine</a></li> <li><a href="/wiki/Tramadol" title="Tramadol">Tramadol</a></li> <li><a href="/w/index.php?title=TRV250&amp;action=edit&amp;redlink=1" class="new" title="TRV250 (page does not exist)">TRV250</a></li> <li><a href="/wiki/Xorphanol" title="Xorphanol">Xorphanol</a></li> <li><a href="/wiki/Zenazocine" title="Zenazocine">Zenazocine</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Antagonists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/4%27,7-Dihydroxyflavone" title="4&#39;,7-Dihydroxyflavone">4',7-Dihydroxyflavone</a></li> <li><a href="/w/index.php?title=Naltrindole-5%27-isothiocyanate&amp;action=edit&amp;redlink=1" class="new" title="Naltrindole-5&#39;-isothiocyanate (page does not exist)">5'-NTII</a></li> <li><a href="/wiki/6%CE%B2-Naltrexol" title="6β-Naltrexol">6β-Naltrexol</a></li> <li><a href="/wiki/6%CE%B2-Naltrexol-d4" title="6β-Naltrexol-d4">6β-Naltrexol-d4</a></li> <li><a href="/w/index.php?title=Alpha-Santolol&amp;action=edit&amp;redlink=1" class="new" title="Alpha-Santolol (page does not exist)">α-Santolol</a></li> <li><a href="/wiki/Chlornaltrexamine" class="mw-redirect" title="Chlornaltrexamine">β-Chlornaltrexamine</a></li> <li><a href="/wiki/Apigenin" title="Apigenin">Apigenin</a></li> <li><a href="/wiki/AT-076" title="AT-076">AT-076</a></li> <li><a href="/wiki/Axelopran" title="Axelopran">Axelopran</a></li> <li><a href="/wiki/Bevenopran" title="Bevenopran">Bevenopran</a></li> <li><a href="/w/index.php?title=7-Benzylidenenaltrexone&amp;action=edit&amp;redlink=1" class="new" title="7-Benzylidenenaltrexone (page does not exist)">BNTX</a></li> <li><a href="/wiki/Catechin" title="Catechin">Catechin</a></li> <li><a href="/wiki/Epicatechin_gallate" title="Epicatechin gallate">Catechin gallate</a></li> <li><a href="/wiki/Clocinnamox" title="Clocinnamox">Clocinnamox</a></li> <li><a href="/wiki/Diacetylnalorphine" title="Diacetylnalorphine">Diacetylnalorphine</a></li> <li><a href="/wiki/Diprenorphine" title="Diprenorphine">Diprenorphine</a></li> <li><a href="/wiki/Epicatechin_gallate" title="Epicatechin gallate">ECG</a></li> <li><a href="/wiki/Gallocatechol" title="Gallocatechol">EGC</a></li> <li><a href="/wiki/Eluxadoline" title="Eluxadoline">Eluxadoline</a></li> <li><a href="/wiki/Epicatechin" class="mw-redirect" title="Epicatechin">Epicatechin</a></li> <li><a href="/w/index.php?title=ICI-154129&amp;action=edit&amp;redlink=1" class="new" title="ICI-154129 (page does not exist)">ICI-154129</a></li> <li><a href="/w/index.php?title=ICI-174864&amp;action=edit&amp;redlink=1" class="new" title="ICI-174864 (page does not exist)">ICI-174864</a></li> <li><a href="/wiki/LY-255582" title="LY-255582">LY-255582</a></li> <li><a href="/wiki/LY-2196044" class="mw-redirect" title="LY-2196044">LY-2196044</a></li> <li><a href="/wiki/Methylnaltrexone" title="Methylnaltrexone">Methylnaltrexone</a></li> <li><a href="/w/index.php?title=Methylnaltrindole&amp;action=edit&amp;redlink=1" class="new" title="Methylnaltrindole (page does not exist)">Methylnaltrindole</a></li> <li><a href="/w/index.php?title=N-Benzylnaltrindole&amp;action=edit&amp;redlink=1" class="new" title="N-Benzylnaltrindole (page does not exist)">N-Benzylnaltrindole</a></li> <li><a href="/wiki/Nalmefene" title="Nalmefene">Nalmefene</a></li> <li><a href="/wiki/Nalorphine" title="Nalorphine">Nalorphine</a></li> <li><a class="mw-selflink selflink">Naltrexone</a></li> <li><a href="/wiki/Naltriben" title="Naltriben">Naltriben</a></li> <li><a href="/wiki/Naltrindole" title="Naltrindole">Naltrindole</a></li> <li><a href="/wiki/Naloxone" title="Naloxone">Naloxone</a></li> <li><a href="/wiki/Naringenin" title="Naringenin">Naringenin</a></li> <li><a href="/wiki/Noribogaine" title="Noribogaine">Noribogaine</a></li> <li><a href="/wiki/Pawhuskin_A" title="Pawhuskin A">Pawhuskin A</a></li> <li><a href="/wiki/Quadazocine" title="Quadazocine">Quadazocine</a></li> <li><a href="/w/index.php?title=SDM25N&amp;action=edit&amp;redlink=1" class="new" title="SDM25N (page does not exist)">SDM25N</a></li> <li><a href="/wiki/SoRI-9409" title="SoRI-9409">SoRI-9409</a></li> <li><a href="/wiki/Taxifolin" title="Taxifolin">Taxifolin</a></li> <li><a href="/wiki/Thienorphine" title="Thienorphine">Thienorphine</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;"><a href="/wiki/%CE%9A-opioid_receptor" title="Κ-opioid receptor">κ-opioid</a><br />(KOR)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Agonists</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=3CS-nalmefene&amp;action=edit&amp;redlink=1" class="new" title="3CS-nalmefene (page does not exist)">3CS-nalmefene</a></li> <li><a href="/wiki/6%27-Guanidinonaltrindole" title="6&#39;-Guanidinonaltrindole">6'-GNTI</a></li> <li><a href="/wiki/8-Carboxamidocyclazocine" title="8-Carboxamidocyclazocine">8-CAC</a></li> <li><a href="/wiki/18-Methoxycoronaridine" title="18-Methoxycoronaridine">18-MC</a></li> <li><a href="/wiki/14-Methoxymetopon" title="14-Methoxymetopon">14-Methoxymetopon</a></li> <li><a href="/wiki/Chlornaltrexamine" class="mw-redirect" title="Chlornaltrexamine">β-Chlornaltrexamine</a></li> <li><a href="/wiki/Beta-Funaltrexamine" class="mw-redirect" title="Beta-Funaltrexamine">β-Funaltrexamine</a></li> <li><a href="/wiki/Adrenorphin" title="Adrenorphin">Adrenorphin (metorphamide)</a></li> <li><a href="/wiki/Akuammicine" title="Akuammicine">Akuammicine</a></li> <li><a href="/wiki/Alazocine" title="Alazocine">Alazocine (SKF-10047)</a></li> <li><a href="/wiki/Allomatrine" class="mw-redirect" title="Allomatrine">Allomatrine</a></li> <li><a href="/w/index.php?title=Apadoline&amp;action=edit&amp;redlink=1" class="new" title="Apadoline (page does not exist)">Apadoline</a></li> <li><a href="/wiki/Asimadoline" title="Asimadoline">Asimadoline</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-12P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-12P (page does not exist)">BAM-12P</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-18P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-18P (page does not exist)">BAM-18P</a></li> <li><a href="/w/index.php?title=Bovine_adrenal_medullary_peptide-22P&amp;action=edit&amp;redlink=1" class="new" title="Bovine adrenal medullary peptide-22P (page does not exist)">BAM-22P</a></li> <li><a href="/wiki/Big_dynorphin" title="Big dynorphin">Big dynorphin</a></li> <li><a href="/wiki/Bremazocine" title="Bremazocine">Bremazocine</a></li> <li><a href="/wiki/BRL-52537" title="BRL-52537">BRL-52537</a></li> <li><a href="/wiki/Butorphan" class="mw-redirect" title="Butorphan">Butorphan</a></li> <li><a href="/wiki/Butorphanol" title="Butorphanol">Butorphanol</a></li> <li><a href="/wiki/BW373U86" title="BW373U86">BW373U86</a></li> <li><a href="/wiki/Cebranopadol" title="Cebranopadol">Cebranopadol</a></li> <li><a href="/wiki/Ciprefadol" title="Ciprefadol">Ciprefadol</a></li> <li><a href="/wiki/CR665" title="CR665">CR665</a></li> <li><a href="/wiki/Cyclazocine" title="Cyclazocine">Cyclazocine</a></li> <li><a href="/wiki/Cyclorphan" title="Cyclorphan">Cyclorphan</a></li> <li><a href="/wiki/Cyprenorphine" title="Cyprenorphine">Cyprenorphine</a></li> <li><a href="/wiki/Desmetramadol" title="Desmetramadol">Desmetramadol (desmethyltramadol)</a></li> <li><a href="/wiki/Heroin" title="Heroin">Diamorphine (heroin)</a></li> <li><a href="/wiki/Diacetylnalorphine" title="Diacetylnalorphine">Diacetylnalorphine</a></li> <li><a href="/wiki/Difelikefalin" title="Difelikefalin">Difelikefalin</a></li> <li><a href="/wiki/Dihydroetorphine" title="Dihydroetorphine">Dihydroetorphine</a></li> <li><a href="/wiki/Dihydromorphine" title="Dihydromorphine">Dihydromorphine</a></li> <li><a href="/wiki/Dinalbuphine_sebacate" title="Dinalbuphine sebacate">Dinalbuphine sebacate</a></li> <li><a href="/wiki/Diprenorphine" title="Diprenorphine">Diprenorphine</a></li> <li><a href="/wiki/Dynorphin_A" title="Dynorphin A">Dynorphin A</a></li> <li><a href="/wiki/Dynorphin_B" title="Dynorphin B">Dynorphin B (rimorphin)</a></li> <li><a href="/wiki/Eluxadoline" title="Eluxadoline">Eluxadoline</a></li> <li><a href="/wiki/Enadoline" title="Enadoline">Enadoline</a></li> <li><a href="/wiki/Eptazocine" title="Eptazocine">Eptazocine</a></li> <li><a href="/w/index.php?title=Erinacine_E&amp;action=edit&amp;redlink=1" class="new" title="Erinacine E (page does not exist)">Erinacine E</a></li> <li><a href="/wiki/Ethylketazocine" title="Ethylketazocine">Ethylketazocine</a></li> <li><a href="/wiki/Etorphine" title="Etorphine">Etorphine</a></li> <li><a href="/wiki/Fedotozine" title="Fedotozine">Fedotozine</a></li> <li><a href="/wiki/Fentanyl" title="Fentanyl">Fentanyl</a></li> <li><a href="/wiki/Gemazocine" title="Gemazocine">Gemazocine</a></li> <li><a href="/wiki/GR-89696" title="GR-89696">GR-89696</a></li> <li><a href="/w/index.php?title=GR-103545&amp;action=edit&amp;redlink=1" class="new" title="GR-103545 (page does not exist)">GR-103545</a></li> <li><a href="/wiki/Hemorphin-4" title="Hemorphin-4">Hemorphin-4</a></li> <li><a href="/wiki/Herkinorin" title="Herkinorin">Herkinorin</a></li> <li><a href="/wiki/HS665" title="HS665">HS665</a></li> <li><a href="/wiki/Hydromorphone" title="Hydromorphone">Hydromorphone</a></li> <li><a href="/wiki/HZ-2" title="HZ-2">HZ-2</a></li> <li><a href="/wiki/Ibogaine" title="Ibogaine">Ibogaine</a></li> <li><a href="/wiki/ICI-199,441" title="ICI-199,441">ICI-199,441</a></li> <li><a href="/wiki/ICI-204,448" title="ICI-204,448">ICI-204,448</a></li> <li><a href="/wiki/Ketamine" title="Ketamine">Ketamine</a></li> <li><a href="/wiki/Ketazocine" title="Ketazocine">Ketazocine</a></li> <li><a href="/wiki/Laudanosine" title="Laudanosine">Laudanosine</a></li> <li><a href="/wiki/Leumorphin" title="Leumorphin">Leumorphin (dynorphin B-29)</a></li> <li><a href="/wiki/Levallorphan" title="Levallorphan">Levallorphan</a></li> <li><a href="/wiki/Levomethorphan" title="Levomethorphan">Levomethorphan</a></li> <li><a href="/wiki/Levorphanol" title="Levorphanol">Levorphanol</a></li> <li><a href="/w/index.php?title=Lexanopadol&amp;action=edit&amp;redlink=1" class="new" title="Lexanopadol (page does not exist)">Lexanopadol</a></li> <li><a href="/wiki/Lofentanil" title="Lofentanil">Lofentanil</a></li> <li><a href="/wiki/LPK-26" title="LPK-26">LPK-26</a></li> <li><a href="/wiki/Lufuradom" title="Lufuradom">Lufuradom</a></li> <li><a href="/wiki/Matrine" title="Matrine">Matrine</a></li> <li><a href="/w/index.php?title=MB-1C-OH&amp;action=edit&amp;redlink=1" class="new" title="MB-1C-OH (page does not exist)">MB-1C-OH</a></li> <li><a href="/wiki/Menthol" title="Menthol">Menthol</a></li> <li><a href="/wiki/Metazocine" title="Metazocine">Metazocine</a></li> <li><a href="/wiki/Metkefamide" title="Metkefamide">Metkefamide</a></li> <li><a href="/wiki/Mianserin" title="Mianserin">Mianserin</a></li> <li><a href="/wiki/Mirtazapine" title="Mirtazapine">Mirtazapine</a></li> <li><a href="/wiki/Morphine" title="Morphine">Morphine</a></li> <li><a href="/wiki/Moxazocine" title="Moxazocine">Moxazocine</a></li> <li><a href="/w/index.php?title=MR-2034&amp;action=edit&amp;redlink=1" class="new" title="MR-2034 (page does not exist)">MR-2034</a></li> <li><a href="/w/index.php?title=N-MPPP&amp;action=edit&amp;redlink=1" class="new" title="N-MPPP (page does not exist)">N-MPPP</a></li> <li><a href="/wiki/Nalbuphine" title="Nalbuphine">Nalbuphine</a></li> <li><a href="/w/index.php?title=Naloxone_benzoylhydrazone&amp;action=edit&amp;redlink=1" class="new" title="Naloxone benzoylhydrazone (page does not exist)">NalBzOH</a></li> <li><a href="/wiki/Nalfurafine" title="Nalfurafine">Nalfurafine</a></li> <li><a href="/wiki/Nalmefene" title="Nalmefene">Nalmefene</a></li> <li><a href="/wiki/Nalodeine" title="Nalodeine">Nalodeine (N-allylnorcodeine)</a></li> <li><a href="/wiki/Nalorphine" title="Nalorphine">Nalorphine</a></li> <li><a href="/wiki/Naltriben" title="Naltriben">Naltriben</a></li> <li><a href="/wiki/Niravoline" title="Niravoline">Niravoline</a></li> <li><a href="/wiki/Norbuprenorphine" title="Norbuprenorphine">Norbuprenorphine</a></li> <li><a href="/wiki/Norbuprenorphine-3-glucuronide" title="Norbuprenorphine-3-glucuronide">Norbuprenorphine-3-glucuronide</a></li> <li><a href="/wiki/Noribogaine" title="Noribogaine">Noribogaine</a></li> <li><a href="/wiki/Norketamine" title="Norketamine">Norketamine</a></li> <li><a href="/wiki/Oripavine" title="Oripavine">Oripavine</a></li> <li><a href="/wiki/Oxilorphan" title="Oxilorphan">Oxilorphan</a></li> <li><a href="/wiki/Oxycodone" title="Oxycodone">Oxycodone</a></li> <li><a href="/wiki/Pentazocine" title="Pentazocine">Pentazocine</a></li> <li><a href="/wiki/Pethidine" title="Pethidine">Pethidine (meperidine)</a></li> <li><a href="/wiki/Phenazocine" title="Phenazocine">Phenazocine</a></li> <li><a href="/wiki/Proxorphan" title="Proxorphan">Proxorphan</a></li> <li><a href="/wiki/Methorphan" title="Methorphan">Racemethorphan</a></li> <li><a href="/wiki/Racemorphan" title="Racemorphan">Racemorphan</a></li> <li><a href="/wiki/RB-64" title="RB-64">RB-64</a></li> <li><a href="/wiki/Salvinorin_A" title="Salvinorin A">Salvinorin A</a> (<a href="/wiki/Salvia_divinorum" title="Salvia divinorum">salvia</a>)</li> <li><a href="/wiki/Salvinorin_B_ethoxymethyl_ether" class="mw-redirect" title="Salvinorin B ethoxymethyl ether">Salvinorin B ethoxymethyl ether</a></li> <li><a href="/wiki/Salvinorin_B_methoxymethyl_ether" title="Salvinorin B methoxymethyl ether">Salvinorin B methoxymethyl ether</a></li> <li><a href="/wiki/Samidorphan" title="Samidorphan">Samidorphan</a></li> <li><a href="/wiki/Spiradoline" title="Spiradoline">Spiradoline</a> (U-62066)</li> <li><a href="/wiki/TH-030418" title="TH-030418">TH-030418</a></li> <li><a href="/wiki/Thienorphine" title="Thienorphine">Thienorphine</a></li> <li><a href="/wiki/Tifluadom" title="Tifluadom">Tifluadom</a></li> <li><a href="/wiki/Tricyclic_antidepressant" title="Tricyclic antidepressant">Tricyclic antidepressants</a> (e.g., <a href="/wiki/Amitriptyline" title="Amitriptyline">amitriptyline</a>, <a href="/wiki/Desipramine" title="Desipramine">desipramine</a>, <a href="/wiki/Imipramine" title="Imipramine">imipramine</a>, <a href="/wiki/Nortriptyline" title="Nortriptyline">nortriptyline</a>)</li> <li><a href="/wiki/U-50488" title="U-50488">U-50488</a></li> <li><a href="/w/index.php?title=U-54494A&amp;action=edit&amp;redlink=1" class="new" title="U-54494A (page does not exist)">U-54494A</a></li> <li><a href="/wiki/U-69593" class="mw-redirect" title="U-69593">U-69593</a></li> <li><a href="/wiki/Xorphanol" title="Xorphanol">Xorphanol</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Antagonists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/4%E2%80%B2-Hydroxyflavanone" class="mw-redirect" title="4′-Hydroxyflavanone">4′-Hydroxyflavanone</a></li> <li><a href="/wiki/4%27,7-Dihydroxyflavone" title="4&#39;,7-Dihydroxyflavone">4',7-Dihydroxyflavone</a></li> <li><a href="/wiki/5%27-Guanidinonaltrindole" title="5&#39;-Guanidinonaltrindole">5'-GNTI</a></li> <li><a href="/wiki/6%27-Guanidinonaltrindole" title="6&#39;-Guanidinonaltrindole">6'-GNTI</a></li> <li><a href="/wiki/6%CE%B2-Naltrexol" title="6β-Naltrexol">6β-Naltrexol</a></li> <li><a href="/wiki/6%CE%B2-Naltrexol-d4" title="6β-Naltrexol-d4">6β-Naltrexol-d4</a></li> <li><a href="/wiki/Chlornaltrexamine" class="mw-redirect" title="Chlornaltrexamine">β-Chlornaltrexamine</a></li> <li><a href="/wiki/Buprenorphine/samidorphan" title="Buprenorphine/samidorphan">Buprenorphine/samidorphan</a></li> <li><a href="/wiki/Amentoflavone" title="Amentoflavone">Amentoflavone</a></li> <li><a href="/w/index.php?title=5%27-Acetamidinoethylnaltrindole&amp;action=edit&amp;redlink=1" class="new" title="5&#39;-Acetamidinoethylnaltrindole (page does not exist)">ANTI</a></li> <li><a href="/wiki/Apigenin" title="Apigenin">Apigenin</a></li> <li><a href="/w/index.php?title=Arodyne&amp;action=edit&amp;redlink=1" class="new" title="Arodyne (page does not exist)">Arodyne</a></li> <li><a href="/wiki/AT-076" title="AT-076">AT-076</a></li> <li><a href="/wiki/Aticaprant" title="Aticaprant">Aticaprant</a></li> <li><a href="/wiki/Axelopran" title="Axelopran">Axelopran</a></li> <li><a href="/w/index.php?title=AZ-MTAB&amp;action=edit&amp;redlink=1" class="new" title="AZ-MTAB (page does not exist)">AZ-MTAB</a></li> <li><a href="/wiki/Binaltorphimine" title="Binaltorphimine">Binaltorphimine</a></li> <li><a href="/wiki/BU09059" title="BU09059">BU09059</a></li> <li><a href="/wiki/Buprenorphine" title="Buprenorphine">Buprenorphine</a></li> <li><a href="/wiki/Catechin" title="Catechin">Catechin</a></li> <li><a href="/wiki/Epicatechin_gallate" title="Epicatechin gallate">Catechin gallate</a></li> <li><a href="/wiki/CERC-501" class="mw-redirect" title="CERC-501">CERC-501 (LY-2456302)</a></li> <li><a href="/wiki/Clocinnamox" title="Clocinnamox">Clocinnamox</a></li> <li><a href="/wiki/Icalcaprant" title="Icalcaprant">CVL-354</a></li> <li><a href="/w/index.php?title=Cyclofoxy&amp;action=edit&amp;redlink=1" class="new" title="Cyclofoxy (page does not exist)">Cyclofoxy</a></li> <li><a href="/wiki/Dezocine" title="Dezocine">Dezocine</a></li> <li><a href="/w/index.php?title=DIPPA&amp;action=edit&amp;redlink=1" class="new" title="DIPPA (page does not exist)">DIPPA</a></li> <li><a href="/wiki/Gallocatechol" title="Gallocatechol">EGC</a></li> <li><a href="/wiki/Epicatechin_gallate" title="Epicatechin gallate">ECG</a></li> <li><a href="/wiki/Epicatechin" class="mw-redirect" title="Epicatechin">Epicatechin</a></li> <li><a href="/wiki/Hyperoside" title="Hyperoside">Hyperoside</a></li> <li><a href="/wiki/JDTic" title="JDTic">JDTic</a></li> <li><a href="/wiki/LY-255582" title="LY-255582">LY-255582</a></li> <li><a href="/wiki/LY-2196044" class="mw-redirect" title="LY-2196044">LY-2196044</a></li> <li><a href="/w/index.php?title=LY-2444296&amp;action=edit&amp;redlink=1" class="new" title="LY-2444296 (page does not exist)">LY-2444296</a></li> <li><a href="/wiki/LY-2459989" title="LY-2459989">LY-2459989</a></li> <li><a href="/w/index.php?title=LY-2795050&amp;action=edit&amp;redlink=1" class="new" title="LY-2795050 (page does not exist)">LY-2795050</a></li> <li><a href="/w/index.php?title=MeJDTic&amp;action=edit&amp;redlink=1" class="new" title="MeJDTic (page does not exist)">MeJDTic</a></li> <li><a href="/wiki/Methylnaltrexone" title="Methylnaltrexone">Methylnaltrexone</a></li> <li><a href="/w/index.php?title=ML190&amp;action=edit&amp;redlink=1" class="new" title="ML190 (page does not exist)">ML190</a></li> <li><a href="/w/index.php?title=ML350&amp;action=edit&amp;redlink=1" class="new" title="ML350 (page does not exist)">ML350</a></li> <li><a href="/w/index.php?title=MR-2266&amp;action=edit&amp;redlink=1" class="new" title="MR-2266 (page does not exist)">MR-2266</a></li> <li><a href="/w/index.php?title=N-Fluoropropyl-JDTic&amp;action=edit&amp;redlink=1" class="new" title="N-Fluoropropyl-JDTic (page does not exist)">N-Fluoropropyl-JDTic</a></li> <li><a href="/wiki/Naloxone" title="Naloxone">Naloxone</a></li> <li><a class="mw-selflink selflink">Naltrexone</a></li> <li><a href="/wiki/Naltrindole" title="Naltrindole">Naltrindole</a></li> <li><a href="/wiki/Naringenin" title="Naringenin">Naringenin</a></li> <li><a href="/wiki/Navacaprant" title="Navacaprant">Navacaprant</a></li> <li><a href="/wiki/Norbinaltorphimine" title="Norbinaltorphimine">Norbinaltorphimine</a></li> <li><a href="/wiki/Noribogaine" title="Noribogaine">Noribogaine</a></li> <li><a href="/wiki/Pawhuskin_A" title="Pawhuskin A">Pawhuskin A</a></li> <li><a href="/wiki/PF-4455242" class="mw-redirect" title="PF-4455242">PF-4455242</a></li> <li><a href="/wiki/RB-64" title="RB-64">RB-64</a></li> <li><a href="/wiki/Quadazocine" title="Quadazocine">Quadazocine</a></li> <li><a href="/wiki/Taxifolin" title="Taxifolin">Taxifolin</a></li> <li><a href="/w/index.php?title=UPHIT&amp;action=edit&amp;redlink=1" class="new" title="UPHIT (page does not exist)">UPHIT</a></li> <li><a href="/wiki/Zyklophin" title="Zyklophin">Zyklophin</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;"><a href="/wiki/Nociceptin_receptor" title="Nociceptin receptor">Nociceptin</a><br />(NOP)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Agonists</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=(Arg14,Lys15)Nociceptin&amp;action=edit&amp;redlink=1" class="new" title="(Arg14,Lys15)Nociceptin (page does not exist)">(Arg14,Lys15)Nociceptin</a></li> <li><a href="/w/index.php?title=((pF)Phe4)Nociceptin(1-13)NH2&amp;action=edit&amp;redlink=1" class="new" title="((pF)Phe4)Nociceptin(1-13)NH2 (page does not exist)">((pF)Phe<sup>4</sup>)Nociceptin(1-13)NH<sub>2</sub></a></li> <li><a href="/w/index.php?title=(Phe1%CE%A8(CH2-NH)Gly2)Nociceptin(1-13)NH2&amp;action=edit&amp;redlink=1" class="new" title="(Phe1Ψ(CH2-NH)Gly2)Nociceptin(1-13)NH2 (page does not exist)">(Phe<sup>1</sup>Ψ(CH<sub>2</sub>-NH)Gly<sup>2</sup>)Nociceptin(1-13)NH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Ac-RYYRWK-NH2&amp;action=edit&amp;redlink=1" class="new" title="Ac-RYYRWK-NH2 (page does not exist)">Ac-RYYRWK-NH<sub>2</sub></a></li> <li><a href="/w/index.php?title=Ac-RYYRIK-NH2&amp;action=edit&amp;redlink=1" class="new" title="Ac-RYYRIK-NH2 (page does not exist)">Ac-RYYRIK-NH<sub>2</sub></a></li> <li><a href="/w/index.php?title=BU08070&amp;action=edit&amp;redlink=1" class="new" title="BU08070 (page does not exist)">BU08070</a></li> <li><a href="/wiki/Buprenorphine" title="Buprenorphine">Buprenorphine</a></li> <li><a href="/wiki/Cebranopadol" title="Cebranopadol">Cebranopadol</a></li> <li><a href="/wiki/Dihydroetorphine" title="Dihydroetorphine">Dihydroetorphine</a></li> <li><a href="/wiki/Etorphine" title="Etorphine">Etorphine</a></li> <li><a href="/w/index.php?title=JNJ-19385899&amp;action=edit&amp;redlink=1" class="new" title="JNJ-19385899 (page does not exist)">JNJ-19385899</a></li> <li><a href="/wiki/Levomethorphan" title="Levomethorphan">Levomethorphan</a></li> <li><a href="/wiki/Levorphanol" title="Levorphanol">Levorphanol</a></li> <li><a href="/w/index.php?title=Lexanopadol&amp;action=edit&amp;redlink=1" class="new" title="Lexanopadol (page does not exist)">Lexanopadol</a></li> <li><a href="/wiki/MCOPPB" title="MCOPPB">MCOPPB</a></li> <li><a href="/wiki/MT-7716" title="MT-7716">MT-7716</a></li> <li><a href="/wiki/NNC_63-0532" title="NNC 63-0532">NNC 63-0532</a></li> <li><a href="/wiki/Nociceptin" title="Nociceptin">Nociceptin (orphanin FQ)</a></li> <li><a href="/w/index.php?title=Nociceptin_(1-11)&amp;action=edit&amp;redlink=1" class="new" title="Nociceptin (1-11) (page does not exist)">Nociceptin (1-11)</a></li> <li><a href="/w/index.php?title=Nociceptin_(1-13)NH2&amp;action=edit&amp;redlink=1" class="new" title="Nociceptin (1-13)NH2 (page does not exist)">Nociceptin (1-13)NH<sub>2</sub></a></li> <li><a href="/wiki/Norbuprenorphine" title="Norbuprenorphine">Norbuprenorphine</a></li> <li><a href="/wiki/Methorphan" title="Methorphan">Racemethorphan</a></li> <li><a href="/wiki/Racemorphan" title="Racemorphan">Racemorphan</a></li> <li><a href="/wiki/Ro64-6198" title="Ro64-6198">Ro64-6198</a></li> <li><a href="/wiki/Ro65-6570" title="Ro65-6570">Ro65-6570</a></li> <li><a href="/wiki/SCH-221510" title="SCH-221510">SCH-221510</a></li> <li><a href="/w/index.php?title=SCH-486757&amp;action=edit&amp;redlink=1" class="new" title="SCH-486757 (page does not exist)">SCH-486757</a></li> <li><a href="/w/index.php?title=SR-8993&amp;action=edit&amp;redlink=1" class="new" title="SR-8993 (page does not exist)">SR-8993</a></li> <li><a href="/wiki/SR-16435" title="SR-16435">SR-16435</a></li> <li><a href="/wiki/Sunobinop" title="Sunobinop">Sunobinop (S-117957)</a></li> <li><a href="/wiki/TH-030418" title="TH-030418">TH-030418</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Antagonists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=(Nphe1)Nociceptin(1-13)NH2&amp;action=edit&amp;redlink=1" class="new" title="(Nphe1)Nociceptin(1-13)NH2 (page does not exist)">(Nphe<sup>1</sup>)Nociceptin(1-13)NH<sub>2</sub></a></li> <li><a href="/wiki/AT-076" title="AT-076">AT-076</a></li> <li><a href="/w/index.php?title=BAN-ORL-24&amp;action=edit&amp;redlink=1" class="new" title="BAN-ORL-24 (page does not exist)">BAN-ORL-24</a></li> <li><a href="/wiki/BTRX-246040" title="BTRX-246040">BTRX-246040 (LY-2940094)</a></li> <li><a href="/wiki/J-113397" class="mw-redirect" title="J-113397">J-113397</a></li> <li><a href="/wiki/JTC-801" title="JTC-801">JTC-801</a></li> <li><a href="/w/index.php?title=Naloxone_benzoylhydrazone&amp;action=edit&amp;redlink=1" class="new" title="Naloxone benzoylhydrazone (page does not exist)">NalBzOH</a></li> <li><a href="/w/index.php?title=Nociceptin_(1-7)&amp;action=edit&amp;redlink=1" class="new" title="Nociceptin (1-7) (page does not exist)">Nociceptin (1-7)</a></li> <li><a href="/w/index.php?title=Nocistatin&amp;action=edit&amp;redlink=1" class="new" title="Nocistatin (page does not exist)">Nocistatin</a></li> <li><a href="/wiki/SB-612111" class="mw-redirect" title="SB-612111">SB-612111</a></li> <li><a href="/w/index.php?title=SR-16430&amp;action=edit&amp;redlink=1" class="new" title="SR-16430 (page does not exist)">SR-16430</a></li> <li><a href="/wiki/Thienorphine" title="Thienorphine">Thienorphine</a></li> <li><a href="/w/index.php?title=Trap-101&amp;action=edit&amp;redlink=1" class="new" title="Trap-101 (page does not exist)">Trap-101</a></li> <li><a href="/w/index.php?title=UFP-101&amp;action=edit&amp;redlink=1" class="new" title="UFP-101 (page does not exist)">UFP-101</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;">Others</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Enkephalinase_inhibitor" title="Enkephalinase inhibitor">Enkephalinase inhibitors</a>:</i> <a href="/wiki/Amastatin" title="Amastatin">Amastatin</a></li> <li><a href="/w/index.php?title=BL-2401&amp;action=edit&amp;redlink=1" class="new" title="BL-2401 (page does not exist)">BL-2401</a></li> <li><a href="/wiki/Candoxatril" title="Candoxatril">Candoxatril</a></li> <li><a href="/wiki/Phenylalanine#D-,_L-_and_DL-phenylalanine" title="Phenylalanine"><span style="font-size:85%;">D</span>-Phenylalanine</a></li> <li><a href="/w/index.php?title=Dexecadotril&amp;action=edit&amp;redlink=1" class="new" title="Dexecadotril (page does not exist)">Dexecadotril (retorphan)</a></li> <li><a href="/wiki/Ecadotril" title="Ecadotril">Ecadotril (sinorphan)</a></li> <li><a href="/wiki/Kelatorphan" title="Kelatorphan">Kelatorphan</a></li> <li><a href="/wiki/Racecadotril" title="Racecadotril">Racecadotril (acetorphan)</a></li> <li><a href="/wiki/RB-101" title="RB-101">RB-101</a></li> <li><a href="/wiki/RB-120" title="RB-120">RB-120</a></li> <li><a href="/wiki/RB-3007" title="RB-3007">RB-3007</a></li> <li><a href="/w/index.php?title=Opiorphan&amp;action=edit&amp;redlink=1" class="new" title="Opiorphan (page does not exist)">Opiorphan</a></li> <li><a href="/wiki/Selank" title="Selank">Selank</a></li> <li><a href="/wiki/Semax" title="Semax">Semax</a></li> <li><a href="/wiki/Spinorphin" title="Spinorphin">Spinorphin</a></li> <li><a href="/wiki/Thiorphan" title="Thiorphan">Thiorphan</a></li> <li><a href="/wiki/Tynorphin" title="Tynorphin">Tynorphin</a></li> <li><a href="/wiki/Ubenimex" title="Ubenimex">Ubenimex (bestatin)</a></li></ul> <ul><li><i>Propeptides:</i> <a href="/wiki/Lipotropin" title="Lipotropin">β-Lipotropin (proendorphin)</a></li> <li><a href="/wiki/Prodynorphin" title="Prodynorphin">Prodynorphin</a></li> <li><a href="/wiki/Proenkephalin" title="Proenkephalin">Proenkephalin</a></li> <li><a href="/w/index.php?title=Pronociceptin&amp;action=edit&amp;redlink=1" class="new" title="Pronociceptin (page does not exist)">Pronociceptin</a></li> <li><a href="/wiki/Proopiomelanocortin" title="Proopiomelanocortin">Proopiomelanocortin (POMC)</a></li></ul> <ul><li><i>Others:</i> <a href="/wiki/Kyotorphin" title="Kyotorphin">Kyotorphin</a> (met-enkephalin releaser/degradation stabilizer)</li></ul> </div></td></tr></tbody></table></div> <style data-mw-deduplicate="TemplateStyles:r1130092004">.mw-parser-output .portal-bar{font-size:88%;font-weight:bold;display:flex;justify-content:center;align-items:baseline}.mw-parser-output .portal-bar-bordered{padding:0 2em;background-color:#fdfdfd;border:1px solid #a2a9b1;clear:both;margin:1em auto 0}.mw-parser-output .portal-bar-related{font-size:100%;justify-content:flex-start}.mw-parser-output .portal-bar-unbordered{padding:0 1.7em;margin-left:0}.mw-parser-output .portal-bar-header{margin:0 1em 0 0.5em;flex:0 0 auto;min-height:24px}.mw-parser-output .portal-bar-content{display:flex;flex-flow:row wrap;flex:0 1 auto;padding:0.15em 0;column-gap:1em;align-items:baseline;margin:0;list-style:none}.mw-parser-output .portal-bar-content-related{margin:0;list-style:none}.mw-parser-output .portal-bar-item{display:inline-block;margin:0.15em 0.2em;min-height:24px;line-height:24px}@media screen and (max-width:768px){.mw-parser-output .portal-bar{font-size:88%;font-weight:bold;display:flex;flex-flow:column wrap;align-items:baseline}.mw-parser-output .portal-bar-header{text-align:center;flex:0;padding-left:0.5em;margin:0 auto}.mw-parser-output .portal-bar-related{font-size:100%;align-items:flex-start}.mw-parser-output .portal-bar-content{display:flex;flex-flow:row wrap;align-items:center;flex:0;column-gap:1em;border-top:1px solid #a2a9b1;margin:0 auto;list-style:none}.mw-parser-output .portal-bar-content-related{border-top:none;margin:0;list-style:none}}.mw-parser-output .navbox+link+.portal-bar,.mw-parser-output .navbox+style+.portal-bar,.mw-parser-output .navbox+link+.portal-bar-bordered,.mw-parser-output .navbox+style+.portal-bar-bordered,.mw-parser-output .sister-bar+link+.portal-bar,.mw-parser-output .sister-bar+style+.portal-bar,.mw-parser-output .portal-bar+.navbox-styles+.navbox,.mw-parser-output .portal-bar+.navbox-styles+.sister-bar{margin-top:-1px}</style><div class="portal-bar noprint metadata noviewer portal-bar-bordered" role="navigation" aria-label="Portals"><span class="portal-bar-header"><a href="/wiki/Wikipedia:Contents/Portals" title="Wikipedia:Contents/Portals">Portal</a>:</span><ul class="portal-bar-content"><li class="portal-bar-item"><span class="nowrap"><span typeof="mw:File"><span><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/WHO_Rod.svg/20px-WHO_Rod.svg.png" decoding="async" width="8" height="19" class="mw-file-element" data-file-width="107" data-file-height="250" /></span></span> </span><a href="/wiki/Portal:Medicine" title="Portal:Medicine">Medicine</a></li></ul></div> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐8669bc5c8‐95k5q Cached time: 20250318155522 Cache expiry: 2592000 Reduced expiry: false Complications: [vary‐revision‐sha1, show‐toc] CPU time usage: 2.072 seconds Real time usage: 2.424 seconds Preprocessor visited node count: 16783/1000000 Post‐expand include size: 619183/2097152 bytes Template argument size: 17097/2097152 bytes Highest expansion depth: 19/100 Expensive parser function count: 16/500 Unstrip recursion depth: 1/20 Unstrip post‐expand size: 692085/5000000 bytes Lua time usage: 1.163/10.000 seconds Lua memory usage: 12263624/52428800 bytes Lua Profile: ? 220 ms 15.9% 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