Pre-exposure Prophylaxis Clinical Trials

20 recruitingLast updated: June 18, 2026

There are 20 actively recruiting pre-exposure prophylaxis clinical trials across 19 countries. Studies span Not Applicable, Phase 3, Phase 4, Phase 1. Top locations include Chicago, Illinois, United States, San Francisco, California, United States, Cape Town, Western Cape, South Africa. Updated daily from ClinicalTrials.gov.


Pre-exposure Prophylaxis Trials at a Glance

20 actively recruiting trials for pre-exposure prophylaxis are listed on ClinicalTrialsFinder across 6 cities in 19 countries. The largest study group is Not Applicable with 9 trials, with the heaviest enrollment activity in Chicago, San Francisco, and Cape Town. Lead sponsors running pre-exposure prophylaxis studies include Merck Sharp & Dohme LLC, Georgetown University, and University of Washington.

Browse pre-exposure prophylaxis trials by phase

Treatments under study

About Pre-exposure Prophylaxis Clinical Trials

Looking for clinical trials for Pre-exposure Prophylaxis? There are currently 8 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Pre-exposure Prophylaxis trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Pre-exposure Prophylaxis clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 120 of 20 trials

Recruiting
Phase 3

A Clinical Study of MK-8527 to Prevent Human Immunodeficiency Virus Type 1 (HIV-1) (MK-8527-011)

Human Immunodeficiency Virus (HIV)HIV Pre-Exposure Prophylaxis
Merck Sharp & Dohme LLC4,390 enrolled81 locationsNCT07044297
Recruiting
Not Applicable

HIV Pre-Exposure Prophylaxis (PrEP) Linkage With Immediate Medications in the Emergency Department Study

PrEPHIV Pre-Exposure Prophylaxis
University of Texas Southwestern Medical Center250 enrolled1 locationNCT07462611
Recruiting
Phase 3

A Study of MK-8527 to Prevent Human Immunodeficiency Virus Type 1 (HIV-1) (MK-8527-010)

Human Immunodeficiency Virus (HIV)HIV Pre-Exposure Prophylaxis
Merck Sharp & Dohme LLC4,580 enrolled30 locationsNCT07071623
Recruiting
Not Applicable

Gathering Online for Dialogue and Discussion to Enhance Social Support

HIVPre-exposure ProphylaxisAlcohol Misuse+1 more
RTI International500 enrolled1 locationNCT05753683
Recruiting
Not Applicable

HIV Testing Counselor-led Care to Catalyze Integration of PrEP Delivery in Family Planning Clinics

Human Immunodeficiency Virus (HIV)HIV Pre-Exposure Prophylaxis
University of Washington30,000 enrolled1 locationNCT07089966
Recruiting
Phase 4

UNCPM 22314 - Pregnancy, Infant and Maternal Health Outcomes Study

Pregnancy RelatedHIV PreventionPre-exposure Prophylaxis
University of North Carolina, Chapel Hill621 enrolled1 locationNCT06158126
Recruiting
Not Applicable

Moon and Sun Brothers: A Community Prevention Intervention (Hermanos de Luna y Sol)

Help-Seeking BehaviorCondomless SexRisky Health Behavior+1 more
San Francisco State University360 enrolled2 locationsNCT07475702
Recruiting
Phase 3

Study of Lenacapavir as a Once-Yearly Injection for HIV Pre-exposure Prophylaxis (PrEP)

HIV Pre-Exposure Prophylaxis
Gilead Sciences350 enrolled31 locationsNCT07047716
Recruiting
Not Applicable

PathToScale: The PERSIST Trial

Oral Pre-exposure Prophylaxis (PrEP)Long-acting Injectable Cabotegravir for PrEP
Georgetown University9,900 enrolled1 locationNCT07221747
Recruiting
Phase 4

Enhancing PrEP Uptake and Retention Among Latine TGW and GBM in the South Using Long-Acting Injectable PrEP

HIV Prevention and CareHIV PreventionHIV Prevention Program+2 more
Duke University100 enrolled1 locationNCT07218211
Recruiting

Universal Test and Connect for HIV Service Delivery in South Africa

Human Immunodeficiency VirusPre-exposure ProphylaxisEmergency Department+1 more
Johns Hopkins University2,000 enrolled1 locationNCT06408142
Recruiting
Not Applicable

Thailand HIV and Stigma Reduction Study

Pre-exposure Prophylaxis
University of Massachusetts, Worcester154 enrolled3 locationsNCT06576648
Recruiting
Not Applicable

Stick2PrEP Cisgender Women and Trans Individuals

HIV PreventionPre-exposure Prophylaxis
Columbia University175 enrolled1 locationNCT05165745
Recruiting
Not Applicable

Case Management Dyad

HIVPre-exposure ProphylaxisCase Management
University of Chicago180 enrolled1 locationNCT06162897
Recruiting
Phase 1

Ph1, Randomized, Double-Blind and Controlled, Dose Escalation and Expansion Study to Assess the Safety and Pharmacokinetics of JST-010 in Healthy Adults

Pre-exposure Prophylaxis Against Pneumonic Plague in Healthy Adults
Just-Evotec Biologics104 enrolled1 locationNCT06943378
Recruiting

Predictors of Health Service Utilizations Among Key Population in Washington DC

Health BehaviorHIVPre-exposure Prophylaxis
Us Helping Us, People Into Living, Inc.100 enrolled1 locationNCT06046079
Recruiting

Quality of Sexual Life of PrEP Users

AdultHIV Pre-exposure Prophylaxis Use
University Hospital, Grenoble1,000 enrolled1 locationNCT06286527
Recruiting
Not Applicable

Hybrid Evaluation of a Home-based HIV Pre-exposure Prophylaxis Program

HIV PreventionPre-exposure ProphylaxisSTI
University of Washington458 enrolled1 locationNCT05856942
Recruiting

PathToScale: An Implementation Evaluation

Oral Pre-exposure Prophylaxis (PrEP)Long-acting Injectable Cabotegravir for PrEP
Georgetown University9,900 enrolled1 locationNCT06319105
Recruiting

Vienna HIV Infection Via Sex Study

HIV InfectionsChlamydiaSyphilis+3 more
Medical University of Vienna500 enrolled1 locationNCT05326061