Clinical trial Recruiting at 6 sites Interventional Ages 13 to 24 Men only

See if PrEP Choice helps young people start and stick with HIV prevention methods

Official title: Combatting HIV Or Other STIs Early (CHOOSE): An Integrated Strategy of Pre-Exposure Prophylaxis (PrEP) Mobile Health (mHealth) Support and Doxycycline Post-Exposure Prophylaxis (DoxyPEP)

Run by Westat · NCT07510048 · Data updated 2026-11-12

This trial tests whether the PrEP Choice package helps 13-24 year-olds in the U.S. begin and continue using PrEP or DoxyPEP for HIV prevention.

More HIV Prevention trials

Quick facts

Study typeInterventional
Ages13 Years to 24 Years
SexMen only
Enrollment200 (estimated)
SponsorWestat
Academic / other
Locations6 sites (San Francisco, California and 5 other locations)
StatusRecruiting
StartedSeptember 16, 2026
Main results expectedMarch 30, 2029
Study endsMarch 30, 2029
Registry record updatedOctober 9, 2026
Trial IDNCT07510048 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Young people aged 13-24 who are not on PrEP, are at elevated HIV acquisition risk, own a smartphone, and can participate at an ATN site.

Probably not a fit

Individuals not interested in PrEP or unable to use PrEP options may derive little or no benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is an individual-level randomized trial with a wait-list control to evaluate the PrEP Choice integrated mHealth package and its cost in promoting PrEP initiation and adherence among young people. Participants receive counseling and a PrEP/DoxyPEP handout, with the intervention group starting PrEP Choice at enrollment and the control group at 9 months, followed for 18 months. PrEP options include daily TDF/FTC, TAF/FTC, event-driven TDF/FTC, CAB-LA injections, and LEN injections, with regimen changes allowed. The study is conducted through ATN site networks at multiple U.S. locations and aims to assess uptake, persistence, and acceptability of PrEP and DoxyPEP. Lead sponsor is Westat, with NICHD, NIDA, and NIMH as collaborators.

Why it matters

Potential benefit: If successful, participants may experience higher initiation and longer adherence to HIV prevention strategies, potentially reducing HIV risk.

How similar studies have gone: Prior related work suggests multi-modal PrEP support can improve uptake and persistence, though this exact package is being tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria

* Age 13-24 years, inclusive;
* Self-reports being at increased likelihood for HIV acquisition, defined as having anal sex with a male in their lifetime;
* Owns an iOS or Android Smartphone and able to access all elements of the PrEP Choice package;
* Not currently on PrEP and interested in learning more about PrEP;
* Is not living with HIV;
* Weighs at least 35 kg;
* Willing to receive PrEP care from a provider at a participating ATN SC;
* Able to understand, read, and speak English;
* Able to participate at the study site; and
* Willing and able to provide written informed consent.
* If of legal age or otherwise able to provide independent informed consent as determined by local law and consistent with IRB policies: Willing and able to provide written informed consent for study participation.
* If not of legal age or otherwise not able to provide independent informed consent as determined by local law and consistent with IRB policies: Parent or legal guardian is willing and able to provide written informed consent for study participation and potential participant is willing and able to provide written assent for study participation.

Exclusion Criteria:

* Female;
* In a mutually monogamous sexual relationship with a partner not living with HIV for the past 12 months;
* Currently participating in an interventional trial of PrEP agents, or prior enrollment in HPTN 083, HPTN 083-01, or any other study of long-acting PrEP (including PURPOSE- 2 lenacapavir study);
* Plan to move within 18 months to an area inaccessible to a participating ATN SC;
* An employee of the participating SC; or
* Any concurrent participation in other clinical trials or behavioral intervention studies without prior approval from the protocol team.
* Any other medical, behavioral, or other conditions that in the opinion of the SC Project Lead could interfere with adherence to study procedures or the individual's ability to remain in the study for an 18-month period or compromise interpretation of study results.

Where it's running

  • San Francisco Department of Public Health
    San Francisco, California, United States
    Recruiting
  • Children's National Medical Center
    Washington D.C., District of Columbia, United States
    Recruiting
  • University of South Florida
    Tampa, Florida, United States
    Recruiting
  • University Illinois Chicago
    Chicago, Illinois, United States
    Recruiting
  • Tulane University
    New Orleans, Louisiana, United States
    Recruiting
  • St. Jude Children's Research Hospital
    Memphis, Tennessee, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.