Could two pills at once boost HIV protection?
NCT ID NCT07349758
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how a one-time dose of two F/TAF tablets (a medicine used to prevent HIV) works in healthy adults. Researchers want to see how much of the drug gets inside cells over 14 days. 24 healthy volunteers will take the pills and have their blood tested. The goal is to find out if a higher single dose could be a simpler way to prevent HIV.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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About 24 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Jan 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * ≥18 years of age, inclusive on the date of screening * Provides written informed consent for the study * Good general health, as determined by medical history, physical examination, vital signs, screening laboratory tests * Non-reactive HIV test results within four weeks of enrollment * An estimated glomerular filtration rate (eGFR) of ≥ 70 mL/min/1.73 m2 via the CKD-EPI 2021 eGFRCr equation * Agrees to use condoms for all sexual events during study participation * Willing to abstain from oral PrEP use outside of study products for the duration of the study Exclusion Criteria: * History of oral PrEP (F/TDF or F/TAF) use in the preceding two months * Persons who have a reactive or positive HIV result from screening visit. * Positive hepatitis B surface antigen (HBsAg) test * Participants with a history of having a gastrectomy, colostomy, ileostomy, or any other procedure altering the gastrointestinal tract or drug absorption * History of any behaviors that place the participant at high-risk for HIV acquisition (e.g., needle sharing, unprotected sex with ≥1 partner in the prior 2 weeks) * Taking concomitant medications that that are known inducers/inhibitors of P-gp that would effect TAF absorption * Pregnancy or lactation * Any other condition or prior therapy that, in the opinion of the investigator, would preclude informed consent, make study participation unsafe, make the individual unsuitable for the study or unable to comply with the study requirements. Such conditions may include, but are not limited to, current or recent history of severe, progressive, or uncontrolled substance abuse, or renal, hepatic, hematological, gastrointestinal, endocrine, pulmonary, neurological, or cerebral disease
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Johns Hopkins University School of Medicine
RECRUITINGBaltimore, Maryland, 21287, United States
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