HIV prevention breakthrough? Twice-Yearly shot could replace daily pills
NCT ID NCT07497594
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study in Brazil offers young men who have sex with men, transgender, and non-binary people a choice between a daily pill or a twice-yearly injection to prevent HIV. Researchers will follow 1,500 participants for up to two years to see how well each option works in real life, how safe it is, and whether people stick with it. The goal is to expand prevention options and make it easier for high-risk groups to stay protected.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- lenacapavir (long-acting injection) and daily oral tenofovir disoproxil fumarate/emtricitabine
- What this could lead to
- If successful, this could provide a convenient twice-yearly injection option for HIV prevention, potentially improving adherence and reducing new infections among high-risk groups.
- What could go wrong
- This is an observational study without randomization, so results may be less definitive. Participants choose their own prevention method, which could introduce bias. Long-term safety and effectiveness in real-world settings are still being evaluated.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 1,500 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Feb 2026
- Expected to finish
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Sep 2029
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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16 to 30 years
- 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.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Ability to understand and sign the Informed Consent Form, which must be obtained before the initiation of any study procedures, and willingness to comply with the protocol requirements Be a cisgender man, a non-binary person designated male at birth, or a transgender woman or transgender man Report having engaged in anal sex with a person designated male at birth within the last six months Be between 16 and 30 years of age Have a body weight equal to or greater than 35 kilograms Seek care at a participating study clinic for human immunodeficiency virus testing or initiation of human immunodeficiency virus pre-exposure prophylaxis, either spontaneously or through peer invitation Have a non-reactive result on a rapid test for human immunodeficiency virus Be an individual without prior use of human immunodeficiency virus pre-exposure prophylaxis, or an individual with prior use who remains in a situation of vulnerability, characterized by: a history of oral human immunodeficiency virus pre-exposure prophylaxis with at least two prior dispensations without return for a new pickup in the six months preceding the enrollment visit, or a history of long-acting cabotegravir use with a delay of at least one scheduled reload dose Exclusion Criteria: Known hypersensitivity to the study medication, its metabolites, or formulation excipients Severe hepatic impairment or a history or current clinical condition of decompensated liver cirrhosis, such as ascites, encephalopathy, or variceal bleeding Known or suspected severe active infection, such as active tuberculosis Need for continuous use of contraindicated concomitant medications Any clinical or psychosocial condition, or prior treatment, that in the opinion of the investigator makes the participant unsuitable for the study or unable to comply with dosing requirements Confirmed or suspected infection with the human immunodeficiency virus Plans to move outside the study area during the follow-up period Prior participation in a clinical study using Lenacapavir in the PURPOSE study Prior participation in a human immunodeficiency virus vaccine study, except in cases where the participant provides documentation demonstrating receipt of placebo and not the active product Current participation in another interventional human immunodeficiency virus prevention study that, in the opinion of the investigator, may interfere with the conduct of this study
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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
8 sites. 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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CEDAP - Centro Especializado em Diagnóstico, Assistência e Pesquisa
RECRUITINGSalvador, Estado de Bahia, 40100-010, Brazil
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CTA/Policlínica Centro
RECRUITINGFlorianópolis, Santa Catarina, 88010-400, Brazil
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Centro de Referência e Treinamento em DST/Aids de São Paulo
RECRUITINGSão Paulo, São Paulo, 04121-000, Brazil
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Centro de Referência em IST/Aids de Campinas (SMS/PMC)
RECRUITINGCampinas, São Paulo, 13013-000, Brazil
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Coordenadoria de IST/Aids da Cidade de São Paulo
RECRUITINGSão Paulo, São Paulo, 01509-020, Brazil
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Fundação de Medicina Tropical Heitor Vieira Dourado
RECRUITINGManaus, Amazonas, 69040-000, Brazil
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Hospital Geral de Nova Iguaçu
RECRUITINGNova Iguaçu, Rio de Janeiro, 26030-380, Brazil
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Instituto Nacional de Infectologia Evandro Chagas
RECRUITINGRio de Janeiro, Rio de Janeiro, 21040-360, Brazil