Clinical trials
Sexually Transmitted Infections (Not HIV or Hepatitis) clinical trials
Below are recruiting sexually transmitted infections (not hiv or hepatitis) clinical trials, each written for real people, not researchers. We’re tracking 778 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05492565Enrolling by invitation
Follow-up study for people on HIV prevention pills
This study follows adults who are at high risk of getting HIV while they take HIV prevention pills (PrEP). It aims to learn how well PrEP fits real-life use in people at risk and who may need extra care.
Seville, AndalusiaAges 18 years+ - NCT06266416Recruiting
Black caregivers & girls empowerment study
This study tests a program called IMARA to support black male caregivers and the girls they care for. It aims to improve family relationships and reduce risky behaviors in girls.
Chicago, IllinoisAges 13 years+ - NCT06203951Recruiting
Better STI testing during pregnancy in Kenya
This study tests a simpler way to check for sexually transmitted infections (STIs) and HIV/syphilis during pregnancy in Kenyan clinics, to help keep both you and your baby healthy.
Homa BayAges Any age - NCT07433985Recruiting
California mobile app study for men after jail release
This study tests a mobile app to help men recently released from jail or prison who use drugs or have sex with men stay healthy and avoid HIV. It's for people who don't have HIV and live in certain California counties.
Oakland, CaliforniaAges 18–59 - NCT06860945Recruiting
Predicting STIs in people on HIV PrEP in Spain
This study is for people in Spain who are starting or already taking PrEP pills to prevent HIV. It aims to create a tool that can help predict who might get a sexually transmitted infection while on PrEP, so doctors can offer better monitoring or prevention.
AlmeríaAges 16 years+ - NCT07500415Recruiting
Doxycycline to prevent STIs in Rio de Janeiro
This trial tests whether taking the antibiotic doxycycline can prevent sexually transmitted infections (STIs) like chlamydia, gonorrhea, and syphilis in people at higher risk. If you are a man or transgender woman who has sex with men, are living with HIV or on PrEP, and have had an STI in the past year, you may be able to join.
Rio de Janeiro, Rio de JaneiroAges 18 years+ - NCT05326061Recruiting
Study for people at high risk of getting HIV
This registry study looks at people who are HIV-negative but at high risk of getting HIV, to better understand risk and care needs. If you qualify, you may be asked to share health and behavior information to help guide future prevention efforts.
ViennaAges 18–100 - NCT07509853Recruiting
Pleasure-Focused Harm Reduction for Chemsex and Substance Use
This study explores how adding conversation about sexual pleasure to harm reduction services can help men who have sex with men and transgender persons who use drugs during sex or use other substances. If you join, you may learn new ways to reduce risks while still enjoying your sex life.
Pathum Wan, BangkokAges 18 years+ - NCT07089836Recruiting
Syphilis blood test study for at-risk and healthy people
This study tests two new blood tests for syphilis. It compares them to approved tests using blood from people who may have or had syphilis, including pregnant women, HIV-positive people, and healthy volunteers.
Lancaster, CaliforniaAges 13 years+ - NCT04855773Recruiting
Mobile text-message support to help people stay on PrEP
This trial tests whether phone-based (iPhone/Android) text-message support can improve how consistently people use PrEP, an HIV prevention medicine. It may help you stay on track with refills and clinic visits, especially if you’re at higher risk of stopping PrEP.
San Francisco, CaliforniaAges 15 years+ - NCT07512856Recruiting
Support Service for Transgender People Using Substances
This study tests a new support program designed specifically for transgender people who use drugs or engage in chemsex (using drugs during sexual activity). The program aims to reduce health risks and provide safer, more culturally respectful care.
Pathum Wan, BangkokAges 18 years+ - NCT07512869Recruiting
Harm Reduction Support for Men Who Have Sex With Men in Bangkok
This study explores ways to support men who have sex with men (MSM) in Bangkok who use drugs during sexual activities, called 'chemsex.' Researchers want to understand how community leaders, healthcare workers, and police can work together to keep people safer and healthier.
Pathum Wan, BangkokAges 18 years+ - NCT07505875Recruiting
Study to create transgender-friendly services for chemsex support
This study aims to develop healthcare services tailored to transgender people regarding chemsex (using drugs during sex). Researchers will interview participants to understand their needs and experiences.
Pathum Wan, BangkokAges 18 years+ - NCT06953310Recruiting
Farming program for teen girls' health and well-being
This study tests whether a farming program that provides food and support can help improve the health and well-being of teenage girls and young women. It is for girls aged 15-19 who are in school, not pregnant, and whose families struggle with food shortages.
KisumuAges 15 years+ - NCT06743204Recruiting
Testing for sexually transmitted infections in women at risk for HIV
This study tests if combining sexually transmitted infection (STI) testing with HIV prevention medication (PrEP) helps control the HIV epidemic. It is for sexually active women aged 15-39 who live in Rakai and recently participated in a community health survey.
KalisizoAges 15–39 - NCT07755618Enrolling by invitationPhase 1
Doxycycline levels and adherence study
This study looks at how the antibiotic doxycycline stays in your body and how well people stick to taking it. It may help find better ways to prevent infections.
Chapel Hill, North CarolinaAges 18–65 - NCT05753683Recruiting
Online group talks to build social support for young women
This study tests whether online discussion groups can increase social support for young Black/African American women who have had recent substance use. It also specifically focuses on women who are HIV negative and not using PrEP, to support healthier choices and community connection.
Durham, North CarolinaAges 18–30 - NCT07563309Recruiting
Testing a new rapid HIV, hepatitis B, and syphilis test
This study evaluates a new rapid blood test that checks for HIV, hepatitis B, and syphilis all at once. Researchers want to make sure the test works well, is easy to use, and gives accurate results.
Johannesburg, GautengAges 18 years+ - NCT02699736Enrolling by invitation
HIV and hepatitis C study in European adults
This study follows people living with HIV who also have hepatitis C antibodies, to better understand how HIV and hepatitis C affect health over time. You may be able to join if you meet the age and enrollment requirements, even if your hepatitis C virus level is currently undetectable.
Buenos AiresAges 16 years+ - NCT05361603Recruiting
Screening for hepatitis B, C, and HIV at the same time
This trial tests how acceptable it is for people who use services outside traditional clinics to be screened for hepatitis B, hepatitis C, and HIV during the same visit. If you join, you would be asked to participate and provide consent for the screening process.
Limoges, Haute VienneAges 18 years+ - NCT06306196RecruitingPhase 2
Hepatitis E vaccine study in healthy adults, children, and people with HIV
This study tests a hepatitis E vaccine called Hecolin in healthy people (ages 2–45) and in adults (18–45) living with HIV who are on antiviral treatment. It aims to see how well the vaccine works and if it's safe for different groups.
Ga-RankuwaAges 2–45 - NCT06250504RecruitingPhase 3
HIV prevention study for young adults
This study tests a long-acting HIV prevention shot (Cabotegravir) or a vaginal ring (DapiRing) along with sexual health services for young people. It aims to find the best way to prevent HIV and support overall health.
Somkele, KwaZulu-NatalAges 15–30 - NCT07429864Recruiting
Bulevirtide for hepatitis D: bile acids and gut bacteria
This study looks at how Bulevirtide, a treatment for hepatitis D, affects bile acids and gut bacteria. It may help patients with chronic HDV and stable liver disease who are already on HBV therapy.
RomaAges 18 years+ - NCT00404989Recruiting
Pregnancy drug safety registry for people with HIV treatment
This trial is a pregnancy registry that collects information about birth outcomes when certain HIV medicines are taken during pregnancy. It helps detect any major birth defects so future pregnancies can be safer.
Wilmington, North CarolinaAges 12–60
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Common questions
- Are there clinical trials for sexually transmitted infections (not hiv or hepatitis)?
- Yes. Clin2 currently lists 778 recruiting sexually transmitted infections (not hiv or hepatitis) studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a sexually transmitted infections (not hiv or hepatitis) trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a sexually transmitted infections (not hiv or hepatitis) trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.