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Available in 15 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-15" 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">15 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%81%D9%8A%D9%86%D8%A7%D8%B2%D9%88%D8%A8%D9%8A%D8%B1%D9%8A%D8%AF%D9%8A%D9%86" title="فينازوبيريدين – Arabic" lang="ar" hreflang="ar" data-title="فينازوبيريدين" 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%81%D9%86%D8%A7%D8%B2%D9%88%D9%BE%DB%8C%D8%B1%DB%8C%D8%AF%DB%8C%D9%86" title="فنازوپیریدین – South Azerbaijani" lang="azb" hreflang="azb" data-title="فنازوپیریدین" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Ffenasopyridin" title="Ffenasopyridin – Welsh" lang="cy" hreflang="cy" data-title="Ffenasopyridin" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Fenazopiridina" title="Fenazopiridina – Spanish" lang="es" hreflang="es" data-title="Fenazopiridina" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Fenazopiridino" title="Fenazopiridino – Esperanto" lang="eo" hreflang="eo" data-title="Fenazopiridino" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%81%D9%86%D8%A7%D8%B2%D9%88%D9%BE%DB%8C%D8%B1%DB%8C%D8%AF%DB%8C%D9%86" title="فنازوپیریدین – Persian" lang="fa" hreflang="fa" data-title="فنازوپیریدین" 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/Ph%C3%A9nazopyridine" title="Phénazopyridine – French" lang="fr" hreflang="fr" data-title="Phénazopyridine" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Fenazopiridina" title="Fenazopiridina – Italian" lang="it" hreflang="it" data-title="Fenazopiridina" 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%A4%D7%A0%D7%90%D7%96%D7%95%D7%A4%D7%99%D7%A8%D7%99%D7%93%D7%99%D7%9F" title="פנאזופירידין – Hebrew" lang="he" hreflang="he" data-title="פנאזופירידין" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%AB%E0%AD%87%E0%AC%A8%E0%AC%BE%E0%AC%9C%E0%AD%8B%E0%AC%AA%E0%AC%BE%E0%AC%87%E0%AC%B0%E0%AC%BF%E0%AC%A1%E0%AC%BF%E0%AC%A8" title="ଫେନାଜୋପାଇରିଡିନ – Odia" lang="or" hreflang="or" data-title="ଫେନାଜୋପାଇରିଡିନ" 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/Fenazopirydyna" title="Fenazopirydyna – Polish" lang="pl" hreflang="pl" data-title="Fenazopirydyna" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Fenazopiridin" title="Fenazopiridin – Serbian" lang="sr" hreflang="sr" data-title="Fenazopiridin" 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/Fenazopiridin" title="Fenazopiridin – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Fenazopiridin" 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-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Fenazopiridin" title="Fenazopiridin – Turkish" lang="tr" hreflang="tr" data-title="Fenazopiridin" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%9D%9E%E9%82%A3%E5%90%A1%E5%95%B6" title="非那吡啶 – Chinese" lang="zh" hreflang="zh" data-title="非那吡啶" 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<div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Urinary analgesic</div> <p class="mw-empty-elt"> </p> <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): Phenazopyridine">Phenazopyridine</span></caption><tbody><tr><td colspan="2" class="infobox-image notheme" style="background-color: #f8f9fa;"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Phenazopyridine.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Phenazopyridine.svg/220px-Phenazopyridine.svg.png" decoding="async" width="220" height="175" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Phenazopyridine.svg/330px-Phenazopyridine.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Phenazopyridine.svg/440px-Phenazopyridine.svg.png 2x" data-file-width="1209" data-file-height="960" /></a></span></td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd">Clinical data</th></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">Pyridium</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/phenazopyridine-hydrochloride.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/a682231.html">a682231</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> <a href="/wiki/DailyMed" title="DailyMed">DailyMed</a>: <span title="dailymed.nlm.nih.gov"><a rel="nofollow" class="external text" href="https://dailymed.nlm.nih.gov/dailymed/search.cfm?labeltype=all&query=Phenazopyridine">Phenazopyridine</a></span></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></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_G04" title="ATC code G04">G04BX06</a> (<span title="www.whocc.no"><a rel="nofollow" class="external text" href="https://www.whocc.no/atc_ddd_index/?code=G04BX06">WHO</a></span>) </li></ul></div></td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd">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="United States">US</abbr>:</small> <a href="/wiki/Over-the-counter_drug" title="Over-the-counter drug">OTC</a></li></ul></div> </td></tr><tr><th colspan="2" class="infobox-header" style="background:#ddd">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%;">3-phenyldiazenylpyridine-2,6-diamine</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=94-78-0">94-78-0</a></span><sup> <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/4756">4756</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=7616">7616</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/DB01438">DB01438</a></span><sup> <span typeof="mw:File"><span><img alt="☒" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/7px-X_mark.svg.png" decoding="async" width="7" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/11px-X_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/14px-X_mark.svg.png 2x" data-file-width="525" data-file-height="600" /></span></span><span style="display:none">N</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.4592.html">4592</a></span><sup> <span typeof="mw:File"><span><img alt="☒" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/7px-X_mark.svg.png" decoding="async" width="7" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/11px-X_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/14px-X_mark.svg.png 2x" data-file-width="525" data-file-height="600" /></span></span><span style="display:none">N</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/K2J09EMJ52">K2J09EMJ52</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/D08346">D08346</a></span><sup> <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/ChEMBL1242">ChEMBL1242</a></span><sup> <span typeof="mw:File"><span><img alt="☒" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/7px-X_mark.svg.png" decoding="async" width="7" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/11px-X_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/14px-X_mark.svg.png 2x" data-file-width="525" data-file-height="600" /></span></span><span style="display:none">N</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/DTXSID1023445">DTXSID1023445</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q3114549#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/100.002.149">100.002.149</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q3114549#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">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>11</sub><span title="Hydrogen">H</span><sub>11</sub><span title="Nitrogen">N</span><sub>5</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="7002213244000000000♠"></span>213.244</span> g·mol<sup>−1</sup></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"> <sup><span typeof="mw:File"><span><img alt="☒" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/7px-X_mark.svg.png" decoding="async" width="7" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/11px-X_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a2/X_mark.svg/14px-X_mark.svg.png 2x" data-file-width="525" data-file-height="600" /></span></span><span style="display:none">N</span><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> <a href="/wiki/Wikipedia:WikiProject_Chemicals/Chembox_validation" title="Wikipedia:WikiProject Chemicals/Chembox validation">(what is this?)</a></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold">  <span class="reflink plainlinks nourlexpansion"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Special:ComparePages&rev1=417929125&page2=Phenazopyridine">(verify)</a></span></span></td></tr></tbody></table> <p><b>Phenazopyridine</b> is a <a href="/wiki/Medication" title="Medication">medication</a> which, when excreted by the kidneys into the <a href="/wiki/Urine" title="Urine">urine</a>, has a local <a href="/wiki/Analgesic" title="Analgesic">analgesic</a> effect on the <a href="/wiki/Urinary_tract" class="mw-redirect" title="Urinary tract">urinary tract</a>. It is often used to help with the <a href="/wiki/Pain" title="Pain">pain</a>, <a href="/wiki/Irritation" title="Irritation">irritation</a>, or <a href="/wiki/Urinary_urgency" class="mw-redirect" title="Urinary urgency">urgency</a> caused by <a href="/wiki/Urinary_tract_infections" class="mw-redirect" title="Urinary tract infections">urinary tract infections</a>, <a href="/wiki/Surgery" title="Surgery">surgery</a>, or injury to the urinary tract. </p><p>In 2021, it was the 285th most commonly prescribed medication in the United States, with more than 700,000 prescriptions.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <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=Phenazopyridine&action=edit&section=1" title="Edit section: Medical uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Phenazopyridine is prescribed for its local analgesic effects on the urinary tract. It is sometimes used in conjunction with an antibiotic (usually <a href="/wiki/Norfloxacin" title="Norfloxacin">norfloxacin</a>) or other anti-infective medication at the beginning of treatment to help provide immediate symptomatic relief. Phenazopyridine does not treat infections or injury; it is only used for symptom relief.<sup id="cite_ref-wcrx.com_3-0" class="reference"><a href="#cite_note-wcrx.com-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-dailymed_4-0" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> It is recommended that it be used for no longer than the first two days of antibacterial treatment as longer treatment may mask symptoms.<sup id="cite_ref-dailymed_4-1" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>Phenazopyridine is also prescribed for other cases requiring relief from irritation or discomfort during urination. For example, it is often prescribed after the use of an in-dwelling <a href="/wiki/Foley_catheter" title="Foley catheter">Foley catheter</a>, endoscopic (<a href="/wiki/Cystoscopy" title="Cystoscopy">cystoscopy</a>) procedures, or after urethral, prostate, or urinary bladder surgery which may result in irritation of the <a href="/wiki/Epithelial" class="mw-redirect" title="Epithelial">epithelial</a> lining of the urinary tract.<sup id="cite_ref-wcrx.com_3-1" class="reference"><a href="#cite_note-wcrx.com-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>This medication is not used to treat infection and may mask symptoms of inappropriately treated UTI. It provides symptom relief during a UTI, following surgery, or injury to the urinary tract. UTI therapy should be limited to 1–2 days.<sup id="cite_ref-dailymed_4-2" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Long-term use of phenazopyridine can mask symptoms.<sup id="cite_ref-Primary_Care_UTI_5-0" class="reference"><a href="#cite_note-Primary_Care_UTI-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </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=Phenazopyridine&action=edit&section=2" title="Edit section: Side effects"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Pyridiumurine.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Pyridiumurine.jpg/220px-Pyridiumurine.jpg" decoding="async" width="220" height="314" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Pyridiumurine.jpg/330px-Pyridiumurine.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Pyridiumurine.jpg/440px-Pyridiumurine.jpg 2x" data-file-width="2157" data-file-height="3074" /></a><figcaption>The characteristic orange-colored urine after taking Phenazopyridine </figcaption></figure> <p>Phenazopyridine produces a vivid color change in urine, typically to a dark orange to reddish color. This effect is common and harmless, and indeed a key indicator of the presence of the medication in the body. Users of phenazopyridine are warned not to wear contact lenses, as phenazopyridine has been known to permanently discolor contact lenses and fabrics.<sup id="cite_ref-wcrx.com_3-2" class="reference"><a href="#cite_note-wcrx.com-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-medline_6-0" class="reference"><a href="#cite_note-medline-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> It also tends to leave an orange-yellow stain on surfaces it comes in contact with. Some may be mistakenly concerned that this indicated blood in the urine. </p><p>Phenazopyridine can also cause <a href="/wiki/Headache" title="Headache">headaches</a>, <a href="/wiki/Upset_stomach" class="mw-redirect" title="Upset stomach">upset stomach</a> (especially when not taken with food), or <a href="/wiki/Dizziness" title="Dizziness">dizziness</a>. Less frequently it can cause a pigment change in the skin or eyes, to a noticeable yellowish color. This is due to a depressed excretion via the kidneys causing a buildup of the medication in the skin, and normally indicates a need to discontinue usage.<sup id="cite_ref-dailymed_4-3" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Other such side effects include <a href="/wiki/Fever" title="Fever">fever</a>, <a href="/wiki/Confusion" title="Confusion">confusion</a>, <a href="/wiki/Shortness_of_breath" title="Shortness of breath">shortness of breath</a>, <a href="/wiki/Skin" title="Skin">skin</a> <a href="/wiki/Rash" title="Rash">rash</a>, and <a href="/wiki/Swelling_(medical)" class="mw-redirect" title="Swelling (medical)">swelling</a> of the face, fingers, feet, or legs.<sup id="cite_ref-wcrx.com_3-3" class="reference"><a href="#cite_note-wcrx.com-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-dailymed_4-4" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Long-term use may cause yellowing of nails.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>Phenazopyridine should be avoided by people with <a href="/wiki/Glucose-6-phosphate_dehydrogenase_deficiency" title="Glucose-6-phosphate dehydrogenase deficiency">glucose-6-phosphate dehydrogenase deficiency</a>,<sup id="cite_ref-dailymed_4-5" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> because it can cause <a href="/wiki/Hemolysis" title="Hemolysis">hemolysis</a> (destruction of <a href="/wiki/Red_blood_cell" title="Red blood cell">red blood cells</a>) due to <a href="/wiki/Oxidative_stress" title="Oxidative stress">oxidative stress</a>.<sup id="cite_ref-Frank_11-0" class="reference"><a href="#cite_note-Frank-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> It has been reported to cause <a href="/wiki/Methemoglobinemia" title="Methemoglobinemia">methemoglobinemia</a> after overdose and even normal doses.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> In at least one case the patient had pre-existing low levels of <a href="/wiki/Methemoglobin_reductase" class="mw-redirect" title="Methemoglobin reductase">methemoglobin reductase</a>,<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> which likely predisposed her to the condition. It has also been reported to cause <a href="/wiki/Sulfhemoglobinemia" title="Sulfhemoglobinemia">sulfhemoglobinemia</a>.<sup id="cite_ref-dailymed_4-6" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p><p>Phenazopyridine is an <a href="/wiki/Azo_dye" title="Azo dye">azo dye</a>.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-AHFS2015_18-0" class="reference"><a href="#cite_note-AHFS2015-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> Other azo dyes, which were previously used in textiles, printing, and plastic manufacturing, have been implicated as <a href="/wiki/Carcinogen" title="Carcinogen">carcinogens</a> that can cause <a href="/wiki/Bladder_cancer" title="Bladder cancer">bladder cancer</a>.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> While phenazopyridine has never been shown to cause cancer in humans, evidence from animal models suggests that it is potentially carcinogenic.<sup id="cite_ref-dailymed_4-7" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Pregnancy">Pregnancy</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phenazopyridine&action=edit&section=3" title="Edit section: Pregnancy"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>This medication has shown no adverse events in animal models, but no human trials have been conducted.<sup id="cite_ref-dailymed_4-8" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> It is not known if phenazopyridine is excreted in breast milk.<sup id="cite_ref-dailymed_4-9" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Pharmacokinetics">Pharmacokinetics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phenazopyridine&action=edit&section=4" title="Edit section: Pharmacokinetics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The full <a href="/wiki/Pharmacokinetic" class="mw-redirect" title="Pharmacokinetic">pharmacokinetic</a> properties of phenazopyridine have not been determined. It has mostly been studied in <a href="/wiki/Animal_model" class="mw-redirect" title="Animal model">animal models</a>, but they may not be very representative of humans.<sup id="cite_ref-jps_21-0" class="reference"><a href="#cite_note-jps-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> Rat models have shown its half-life to be 7.35 hours,<sup id="cite_ref-bdd_22-0" class="reference"><a href="#cite_note-bdd-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> and 40% is metabolized hepatically (by the liver).<sup id="cite_ref-bdd_22-1" class="reference"><a href="#cite_note-bdd-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mechanism_of_action">Mechanism of action</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phenazopyridine&action=edit&section=5" title="Edit section: Mechanism of action"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Phenazopyridine's <a href="/wiki/Mechanism_of_action" title="Mechanism of action">mechanism of action</a> is not well known, and only basic information on its interaction with the body is available. It is known that the chemical has a direct topical analgesic effect on the <a href="/wiki/Mucosa" class="mw-redirect" title="Mucosa">mucosa</a> lining of the urinary tract. It is rapidly excreted by the kidneys directly into the urine.<sup id="cite_ref-jps_21-1" class="reference"><a href="#cite_note-jps-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Hydroxylation" title="Hydroxylation">Hydroxylation</a> is the major form of metabolism in humans,<sup id="cite_ref-jps_21-2" class="reference"><a href="#cite_note-jps-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> and the <a href="/wiki/Azo_compound" title="Azo compound">azo</a> bond is usually not cleaved.<sup id="cite_ref-jps_21-3" class="reference"><a href="#cite_note-jps-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> On the order of 65% of an oral dose will be secreted directly into the urine chemically unchanged.<sup id="cite_ref-dailymed_4-10" class="reference"><a href="#cite_note-dailymed-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Brand_names">Brand names</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Phenazopyridine&action=edit&section=6" title="Edit section: Brand names"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In addition to its generic form, phenazopyridine is distributed under the following brand names: </p> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col" style="column-width: 15em;"> <ul><li>Azo-Maximum Strength</li> <li>Azo-Standard</li> <li>Baridium</li> <li>Nefrecil</li> <li>Phenazalgin</li> <li>Phenazo</li> <li>Phenazodine</li> <li>Pyridiate</li> <li>Pyridium</li> <li>Pyridium Plus</li> <li>Sedural</li> <li>Uricalm</li> <li>Uristat</li> <li>Uropyrine</li> <li>Urodine</li> <li>Urogesic</li> <li>Urovit</li></ul></div> <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=Phenazopyridine&action=edit&section=7" 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 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Retrieved <span class="nowrap">14 January</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ClinCalc&rft.atitle=The+Top+300+of+2021&rft_id=https%3A%2F%2Fclincalc.com%2FDrugStats%2FTop300Drugs.aspx&rfr_id=info%3Asid%2Fen.wikipedia.org%3APhenazopyridine" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</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://clincalc.com/DrugStats/Drugs/Phenazopyridine">"Phenazopyridine - Drug Usage Statistics"</a>. <i>ClinCalc</i><span class="reference-accessdate">. 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class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ammonium_chloride" title="Ammonium chloride">Ammonium chloride</a></li> <li><a href="/wiki/Calcium_chloride" title="Calcium chloride">Calcium chloride</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Urinary_system" title="Urinary system">Urinary</a> <a href="/wiki/Antispasmodic" title="Antispasmodic">antispasmodics</a><br />(primarily <a href="/wiki/Muscarinic_antagonist" title="Muscarinic antagonist">antimuscarinics</a>)</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Darifenacin" title="Darifenacin">Darifenacin</a></li> <li><a href="/wiki/Desfesoterodine" title="Desfesoterodine">Desfesoterodine</a></li> <li><a href="/wiki/Emepronium_bromide" title="Emepronium bromide">Emepronium</a></li> <li><a href="/wiki/Fesoterodine" title="Fesoterodine">Fesoterodine</a></li> <li><a href="/wiki/Flavoxate" title="Flavoxate">Flavoxate</a></li> <li><a href="/wiki/Imidafenacin" title="Imidafenacin">Imidafenacin</a></li> <li><a href="/wiki/Meladrazine" title="Meladrazine">Meladrazine</a></li> <li><a href="/wiki/Mirabegron" title="Mirabegron">Mirabegron</a></li> <li><a href="/wiki/Oxybutynin" title="Oxybutynin">Oxybutynin</a></li> <li><a href="/wiki/Propiverine" title="Propiverine">Propiverine</a></li> <li><a href="/wiki/Solifenacin" title="Solifenacin">Solifenacin</a></li> <li><a href="/wiki/Terodiline" title="Terodiline">Terodiline</a></li> <li><a href="/wiki/Tolterodine" title="Tolterodine">Tolterodine</a></li> <li><a href="/wiki/Trospium_chloride" title="Trospium chloride">Trospium chloride</a></li> <li><a href="/wiki/Vibegron" title="Vibegron">Vibegron</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other urologicals</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/Urea" title="Urea">Urea</a> analogues:</i> <a href="/wiki/Acetohydroxamic_acid" title="Acetohydroxamic acid">Acetohydroxamic acid</a></li> <li><a href="/wiki/Salicylhydroxamic_acid" title="Salicylhydroxamic acid">Salicylhydroxamic acid</a></li></ul> <ul><li><i>Other:</i> <a href="/wiki/Collagen" title="Collagen">Collagen</a></li> <li><a href="/wiki/Dapoxetine" title="Dapoxetine">Dapoxetine</a></li> <li><a href="/wiki/Dimethyl_sulfoxide" title="Dimethyl sulfoxide">Dimethyl sulfoxide</a></li> <li><a href="/wiki/Magnesium_hydroxide" title="Magnesium hydroxide">Magnesium hydroxide</a></li> <li><a href="/wiki/Pentosan_polysulfate" title="Pentosan polysulfate">Pentosan polysulfate</a></li> <li><a class="mw-selflink selflink">Phenazopyridine</a></li> <li><a href="/wiki/Phenyl_salicylate" title="Phenyl salicylate">Phenyl salicylate</a></li> <li><a href="/wiki/Succinimide" title="Succinimide">Succinimide</a></li> <li><a href="/wiki/Tiopronin" title="Tiopronin">Tiopronin</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Phenazopyridine&oldid=1249483701">https://en.wikipedia.org/w/index.php?title=Phenazopyridine&oldid=1249483701</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Azo_compounds" title="Category:Azo compounds">Azo compounds</a></li><li><a href="/wiki/Category:Drugs_with_unknown_mechanisms_of_action" title="Category:Drugs with unknown 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