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https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-1211642948-e1696344942848-300x176.jpg 300w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-1211642948-e1696344942848-1536x901.jpg 1536w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-1211642948-e1696344942848.jpg 1663w" sizes="(max-width: 1024px) 100vw, 1024px" type="image/jpg"><img src="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-1211642948-e1696344942848-1024x600.jpg" role="img" alt="""" property="v:image" content="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-1211642948-e1696344942848-1024x600.jpg" /></picture> </div> </div> <div class="secondary-cnt"> <h1>驴Qu茅 son los estudios cl铆nicos? <span id='search-query'></span></h1> <div class="copy"><p>Los estudios cl铆nicos pueden ayudar a los investigadores a encontrar mejores tratamientos. Es solo a trav茅s de estudios cl铆nicos que los nuevos medicamentos, tratamientos y dispositivos pueden aprobarse para uso p煤blico.</p> </div> </div> </div>  <section> <div class="row"> <div class="col-12"> <div class="wysiwyg-container"> <div class="content"> <h2>驴Qu茅 son los estudios cl铆nicos y c贸mo funcionan?</h2> <p>Un estudio cl铆nico es un estudio de investigaci贸n dise帽ado para saber c贸mo nuestro cuerpo responde a los medicamentos u otros tratamientos.<br /> Estudios cl铆nicos:</p> <ul> <li>Prueban nuevas formas de prevenir, encontrar, diagnosticar o tratar enfermedades.</li> <li>Ayudan a averiguar si los nuevos tratamientos en investigaci贸n o los nuevos usos de los tratamientos existentes son seguros y funcionan bien.</li> </ul> <p>Los estudios cl铆nicos tambi茅n suelen denominarse estudios cl铆nicos e investigaci贸n cl铆nica.</p> </div> </div> <div class="slider-container" id="phase-slider-1"> <div class="slider-content"> <div class="content"> <h2>Los estudios cl铆nicos se llevan a cabo en fases</h2> <p>Antes de la aprobaci贸n de la autoridad sanitaria, cualquier tratamiento (vacuna, medicamento, dispositivo m茅dico o procedimiento) debe pasar por 3 fases de estudios cl铆nicos. A veces, los estudios de 4 fases se llevan a cabo despu茅s de la aprobaci贸n. Cada fase prueba la seguridad del tratamiento, cu谩n bien funciona, la cantidad (dosis) y los efectos secundarios. Toda participaci贸n en estudios cl铆nicos es voluntaria.</p> </div> </div> <div class="phase-carousel"> <div class="swiper-container"> <div class="swiper-wrapper"> <div class="swiper-slide"> <div class="phase"> <div class="phase-header"> <h2>Fase 1</h2> </div> <div class="phase-body"> <div class="volunteers"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-volunteers.svg" alt="Volunteers Icon"> </div> <div class="content"> <p>La seguridad del medicamento en investigaci贸n se eval煤a en un grupo relativamente peque帽o de 20 a 100 voluntarios que, por lo general, son sanos, pero no siempre.</p> </div> </div> <div class="trial"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-trial.svg" alt="Trial Icon"> </div> <div class="content"> <p>El estudio puede realizarse en el consultorio de un m茅dico o en un hospital.</p> </div> </div> <p class="goal">Los objetivos de los estudios de fase 1 son determinar:</p> <ul> <li>Si el medicamento en investigaci贸n es seguro.</li> <li>Si hay efectos secundarios.</li> <li>C贸mo el cuerpo descompone y elimina el medicamento del estudio.</li> <li>How much investigational medication is needed and how often</li> <li>Cu谩nto medicamento en investigaci贸n se necesita y con qu茅 frecuencia.</li> <li>Si las vacunas provocan la respuesta prevista del sistema inmunitario del cuerpo.</li> </ul> <p>Los estudios de fase 1 pueden tardar de seis meses a un a帽o en completarse.</p> </div> </div> </div> <div class="swiper-slide"> <div class="phase"> <div class="phase-header"> <h2>Fase 2</h2> </div> <div class="phase-body"> <div class="volunteers"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-volunteers.svg" alt="Volunteers Icon"> </div> <div class="content"> <p>Se eval煤a el medicamento o la vacuna en entre 100 y 500 voluntarios, aproximadamente.</p> </div> </div> <div class="trial"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-trial.svg" alt="Trial Icon"> </div> <div class="content"> <p>En el caso de los medicamentos, los voluntarios suelen padecer la enfermedad o afecci贸n para cuyo tratamiento se dise帽贸 el medicamento en investigaci贸n. En los estudios de vacunas, los voluntarios suelen estar sanos.</p> </div> </div> <p class="goal">Los objetivos de los estudios de fase 2 son determinar:</p> <ul> <li>Qu茅 tan bien funciona el medicamento o la vacuna en investigaci贸n.</li> <li>Si el medicamento o la vacuna en investigaci贸n son seguros.</li> <li>Si hay efectos secundarios.</li> <li>Qu茅 cantidad de medicamento o vacuna en investigaci贸n se necesita y con qu茅 frecuencia.</li> </ul> <p>Los estudio s de fase 2 pueden tardar de seis meses a un a帽o en completarse.</p> </div> </div> </div> <div class="swiper-slide"> <div class="phase"> <div class="phase-header"> <h2>Fase 3</h2> </div> <div class="phase-body"> <div class="volunteers"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-volunteers.svg" alt="Volunteers Icon"> </div> <div class="content"> <p>Se eval煤a el medicamento o la vacuna en entre 1000 y 5000 voluntarios, aproximadamente.</p> </div> </div> <div class="trial"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-trial.svg" alt="Trial Icon"> </div> <div class="content"> <p>En el caso de los medicamentos, los voluntarios padecen la enfermedad o afecci贸n para cuyo tratamiento se dise帽贸 el medicamento. En estudios de vacunas, los voluntarios pueden estar sanos, o padecer enfermedades o afecciones. Los estudios de fase 3 pueden realizarse en el consultorio de un m茅dico, en una cl铆nica o en un hospital.</p> </div> </div> <p class="goal">Los investigadores monitorean de cerca a los participantes a intervalos regulares para:</p> <ul> <li>Confirmar que el medicamento o la vacuna en investigaci贸n sean e”caces.</li> <li>Identificar y monitorear los efectos secundarios.</li> <li>Comparar el medicamento o la vacuna con los tratamientos de uso frecuente.</li> </ul> <p>Los estudios de fase 3 pueden tardar de uno a cuatro a帽os en completarse, lo que depender谩 de la enfermedad, la duraci贸n del estudio y la cantidad de<br /> voluntarios.</p> </div> </div> </div> <div class="swiper-slide"> <div class="phase"> <div class="phase-header"> <h2>Fase 4</h2> </div> <div class="phase-body"> <div class="volunteers"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-volunteers.svg" alt="Volunteers Icon"> </div> <div class="content"> <p>Miles de personas suelen participar en los estudios en curso.</p> </div> </div> <div class="trial"> <div class="icon"> <img src="https://www.msdclinicaltrials.com/app/themes/msd/dist/images/icons/icon-trial.svg" alt="Trial Icon"> </div> <div class="content"> <p>Los estudios cl铆nicos de fase 4 se llevan a cabo despu茅s de que los organismos gubernamentales y regulatorios adecuados hayan aprobado el medicamento o la vacuna, y estos ya se comercializan.</p> </div> </div> <p class="goal">Los investigadores contin煤an recopilando informaci贸n sobre:</p> <ul> <li>El medicamento o la vacuna, y su seguridad, efectos secundarios y efficacia.</li> </ul> <p>Los estudios de fase 4 est谩n en curso.</p> </div> </div> </div> </div> </div> <button class="swiper-button-prev"> <span class="text">Previous Slide</span><span class="arrow"></span> </button> <button class="swiper-button-next"> <span class="text">Next Slide</span><span class="arrow"></span> </button> <div class="swiper-pagination"></div> </div> </div> <div class="photo-content-container"> <div class="photo-content"> <div class="row"> <div class="col-6 image-container"> <div class="photo"> <picture><source srcset="https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-768x792.jpg 768w, https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-993x1024.jpg 993w, https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-300x309.jpg 300w, https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-1024x1056.jpg 1024w, https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-1490x1536.jpg 1490w, https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237.jpg 1655w" sizes="(max-width: 768px) 100vw, 768px" type="image/jpg"><img src="https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-768x792.jpg" role="img" alt="Billing coordinator meets with patient" property="v:image" content="https://www.msdclinicaltrials.com/app/uploads/2023/08/GettyImages-1404901784-scaled-e1695307531237-768x792.jpg" /></picture> </div> </div> <div class="col-6 wysiwyg-container"> <div class="content"> <h2>La importancia de diversidad de participantes</h2> <p>La edad, la raza, el sexo, el origen 茅tnico y muchos otros factores intervienen en la reacci贸n de una persona a un tratamiento con un medicamento en investigaci贸n. Para averiguar si un tratamiento es seguro y funciona bien para todas las personas, los investigadores deben tener participantes diversos en los estudios cl铆nicos. Para obtener m谩s informaci贸n sobre el compromiso de MSD con la diversidad en los estudios cl铆nicos, visite nuestra secci贸n sobre diversidad.</p> <p><a class="btn-primary" href="https://www.msdclinicaltrials.com/diversidad-e-inclusion/?lang=es">Visite nuestra p谩gina sobre Diversidad</a></p> </div> </div> </div> </div> <div class="content-photo"> <div class="row"> <div class="col-6 wysiwyg-container"> <div class="content"> <h2>Participaci贸n en estudios cl铆nicos</h2> <p>Participar en un estudio cl铆nico es un proceso. Hemos descrito los pasos que puede esperar antes, durante y despu茅s de participar en un estudio cl铆nico.</p> <p><a class="btn-primary" href="https://www.msdclinicaltrials.com/proceso-de-participacion/?lang=es">Visite nuestra p谩gina del proceso de participaci贸n</a></p> </div> </div> <div class="col-6"> <div class="photo"> <picture><source srcset="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-768x512.jpeg 768w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-1024x683.jpeg 1024w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-300x200.jpeg 300w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-1536x1024.jpeg 1536w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-2048x1365.jpeg 2048w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-1920x1280.jpeg 1920w" sizes="(max-width: 768px) 100vw, 768px" type="image/jpeg"><img src="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-768x512.jpeg" role="img" alt="GettyImages-865900230" property="v:image" content="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-865900230-768x512.jpeg" /></picture> </div> </div> </div> </div> <div class="photo-content"> <div class="row"> <div class="col-6 image-container"> <div class="photo"> <picture><source srcset="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-768x512.jpeg 768w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-1024x683.jpeg 1024w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-300x200.jpeg 300w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-1536x1024.jpeg 1536w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-2048x1365.jpeg 2048w, https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-1920x1280.jpeg 1920w" sizes="(max-width: 768px) 100vw, 768px" type="image/jpeg"><img src="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-768x512.jpeg" role="img" alt="GettyImages-605381119" property="v:image" content="https://www.msdclinicaltrials.com/app/uploads/2022/12/GettyImages-605381119-768x512.jpeg" /></picture> </div> </div> <div class="col-6 wysiwyg-container"> <div class="content"> <h2>Qu茅 se debe considerar antes de participar</h2> <p>Antes de decidir si se incorporar谩 a un estudio cl铆nico, obtenga la mayor cantidad de informaci贸n posible al respecto. Debe sentirse c贸modo al hacerles a los investigadores todas sus preguntas sobre el estudio, la atenci贸n que puede esperar y si hay costos. Explore nuestra lista de preguntas para hacerle al equipo de investigaci贸n.</p> <p><a class="btn-primary" href="https://www.msdclinicaltrials.com/que-considerar/?lang=es">Visite nuestra p谩gina sobre qu茅 considerar</a></p> </div> </div> </div> </div> </div> <div class="global-cta-container box has-photo"> <div class="row"> <div class="col-6"> <div class="content"> <h2>驴A煤n tiene preguntas?</h2> <p>Nuestra secci贸n Preguntas frecuentes tiene respuestas a las preguntas m谩s frecuentes y un glosario de t茅rminos que debe conocer.</p> <p><a class="btn-secondary btn-secondary-white btn-secondary-small" href="https://www.msdclinicaltrials.com/preguntas-frecuentes/?lang=es">Preguntas frecuentes</a></p> <p><a class="btn-secondary btn-secondary-white btn-secondary-small" href="https://www.msdclinicaltrials.com/glosario/?lang=es">Glosario</a></p> </div> </div> <div class="col-6"> <div class="photo"> <picture><source srcset="https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-1024x540.jpg 1024w, https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-768x405.jpg 768w, https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-1200x633.jpg 1200w, https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-300x158.jpg 300w, https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-1536x810.jpg 1536w, https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-2048x1080.jpg 2048w, https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-1920x1013.jpg 1920w" sizes="(max-width: 1024px) 100vw, 1024px" type="image/jpg"><img src="https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-1024x540.jpg" role="img" alt="Home is more comfortable than a consulting room" property="v:image" content="https://www.msdclinicaltrials.com/app/uploads/2025/01/GettyImages-1283667981-1024x540.jpg" /></picture> </div> </div> </div> </div> </div> </div> </section> </main> <footer class="footer"> <a href="https://www.msdclinicaltrials.com/?lang=es" class="logo"> <img src="https://www.msdclinicaltrials.com/app/uploads/2022/12/MSD-inverse-logo.svg" role="img" alt="MSD-inverse-logo" property="v:image" content="https://www.msdclinicaltrials.com/app/uploads/2022/12/MSD-inverse-logo.svg" /> <span>MSD</span> </a> <div class="content"> <nav class="utility"><ul id="menu-espanol-footer-navigation" class="menu"><li id="menu-item-36660" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-36660"><a href="https://www.msd.com/">MSD.com</a></li> <li id="menu-item-36661" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-36661"><a target="_blank" href="https://www.msdprivacy.com/">Pol铆tica de privacidad de MSD</a></li> <li id="menu-item-36662" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-36662"><a href="https://www.msd.com/terms-of-use/">T茅rminos de uso</a></li> <li id="menu-item-36663" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-36663"><a href="#" class="ot-sdk-show-settings">Preferencias de cookies</a></li> <li id="menu-item-36664" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-36664"><a href="https://www.msd.com/our-commitment-to-accessibility-for-all/">Accesibilidad</a></li> </ul></nav> <p class="copyright">Copyright 漏 2025 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. 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