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Number of Visits: 28

Lenacapavir + F/TDF for HIV Prevention
(PURPOSE 4 Trial)

Not currently recruiting at 9 trial locations

Overseen ByGilead Clinical Study Information Center

Age: 18+

Sex: Any

Trial Phase: Phase 2

Sponsor: Gilead Sciences

Disqualifiers: HIV positive, Hepatitis, Liver fibrosis, others

No Placebo GroupAll trial participants will receive the active study treatment (no placebo)

Prior Safety DataThis treatment has passed at least one previous human trial

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial explores a new approach to prevent HIV in people who inject drugs by studying the effectiveness and safety of lenacapavir when paired with F/TDF, a common HIV prevention pill. The study includes different groups: some participants will receive lenacapavir injections, while others will take the F/TDF pill. Individuals who have recently shared injection equipment and tested negative for HIV may be suitable candidates for this study. As a Phase 2 trial, the research focuses on measuring the treatment's effectiveness in an initial, smaller group of people.

Will I have to stop taking my current medications?

The trial information does not specify if you need to stop taking your current medications. It's best to discuss this with the study team or your doctor.

Is there any evidence suggesting that this trial's treatments are likely to be safe?

Research has shown that lenacapavir (LEN) is generally safe, with no major safety concerns identified in earlier studies. In one study, only 1.2% of participants reported minor issues, indicating that LEN is usually well-tolerated.

For emtricitabine/tenofovir disoproxil fumarate (F/TDF), studies have demonstrated its safety in preventing HIV, and the FDA has approved it for this use. Some individuals might experience mild side effects, such as nausea or fatigue, but these are uncommon.

Both treatments have demonstrated safety in previous studies, making them promising options for HIV prevention.¹ ² ³ ⁴ ⁵

Why are researchers excited about this trial's treatments?

Researchers are excited about lenacapavir for HIV prevention because it offers a new approach with its long-acting subcutaneous injection, administered just twice a year. This is a significant shift from the current standard, which typically involves daily oral medications like emtricitabine/tenofovir disoproxil fumarate (F/TDF). Lenacapavir targets the HIV capsid, a different mechanism than most existing treatments, potentially providing more sustained protection. This could enhance convenience and adherence for people at risk of HIV, making it a promising option for reducing transmission.

What evidence suggests that this trial's treatments could be effective for HIV prevention?

Research has shown that lenacapavir, which participants in this trial may receive, is highly effective in preventing HIV. Studies indicate it reduces the risk of contracting HIV by 96% compared to the expected rate without it and is 89% more effective than other prevention methods. Lenacapavir is administered as an injection every six months, simplifying adherence to prevention plans.

Another treatment option in this trial is emtricitabine/tenofovir disoproxil fumarate (F/TDF), which is also effective for preventing HIV when used as PrEP (pre-exposure prophylaxis). When taken correctly, it can reduce the risk of HIV by nearly 90%. Consistent use is crucial for optimal results.⁶ ⁷ ⁸ ⁹ ¹⁰

Who Is on the Research Team?

Gilead Study Director

Principal Investigator

Gilead Sciences

Are You a Good Fit for This Trial?

This trial is for people in the US who inject drugs and have shared needles within the last month. They must not have HIV or hepatitis B, should have a kidney function with GFR of at least 60 mL/min, and show recent signs of injection use. A positive drug screen for substances like opioids or stimulants is also required.

Inclusion Criteria

There is indication of recent intramuscular injection, such as needle marks.

My kidney function, measured by GFR, is 60 mL/min or higher.

You have tested positive for illicit drugs such as opioids, stimulants, psychoactive substances or any combination thereof.

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Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Randomized Phase

Participants receive either subcutaneous LEN or daily F/TDF for up to 52 weeks

52 weeks

Visits at Day 1, Week 26, and every 13 weeks

Open-label Extension Phase

Participants may opt into continuation of treatment with SC LEN every 26 weeks

Long-term

Visits every 13 weeks

Pharmacokinetic (PK) Tail Phase

Participants receive open-label oral F/TDF once daily for up to 78 weeks

78 weeks

Visits every 13 weeks

Follow-up

Participants are monitored for safety and effectiveness after treatment

4 weeks

1 visit (in-person)

What Are the Treatments Tested in This Trial?

Interventions

Emtricitabine/Tenofovir Disoproxil Fumarate (F/TDF)
Lenacapavir

Trial Overview The study tests how lenacapavir (LEN), given as tablets and injections, moves through the body and its safety when combined with Truvada® (F/TDF) as a preventive treatment against HIV in those who inject drugs.

How Is the Trial Designed?

4Treatment groups

Experimental Treatment

Group I: Randomized Phase: Lenacapavir (LEN) GroupExperimental Treatment2 Interventions

Participants will receive subcutaneous (SC) LEN 927 mg on Day 1 and Week 26 and oral LEN 600 mg on Days 1 and 2.

Group II: Randomized Phase: Emtricitabine/ Tenofovir Disoproxil Fumarate (F/TDF) GroupExperimental Treatment1 Intervention

Participants will receive daily F/TDF (200/300 mg) fixed dose combination (FDC) tablets for up to 52 weeks.

Group III: Pharmacokinetic (PK) Tail Phase: F/TDFExperimental Treatment1 Intervention

Participants eligible for the PK Tail Phase will receive open-label oral F/TDF once daily for up to 78 weeks and complete study visits every 13 weeks (± 7 days). PK Tail Day 1 visit will occur 26 weeks (± 7 days) after the last SC LEN injection.

Group IV: Open-label Extension Phase: LENExperimental Treatment2 Interventions

Participants randomized to LEN in the Randomized Phase who choose to participate in the LEN Open-Label Extension (OLE) Phase will receive SC LEN every 26 weeks (± 7 days) and have study visits every 13 weeks (± 7 days). Participants randomized to F/TDF in the Randomized Phase who choose to participate in LEN OLE Phase will switch to SC LEN and have study visits at LEN OLE Day 1, Week 4 (± 2 days), Week 13 (± 7 days), and every 13 weeks (± 7 days) thereafter. SC LEN will be administered at the LEN OLE Day 1 visit and every 26 weeks thereafter. These participants will also receive loading doses of oral LEN on OLE Days 1 and 2. Upon completion of the LEN OLE Phase, participants will transition to local HIV prevention services and return for a 30-day follow-up visit. At that time, participation in the study will end.

Emtricitabine/Tenofovir Disoproxil Fumarate (F/TDF) is already approved in United States, European Union, Canada for the following indications:

Approved in United States as Truvada for:

Pre-exposure prophylaxis (PrEP) for HIV-1 infection

Approved in European Union as Truvada for:

Pre-exposure prophylaxis (PrEP) for HIV-1 infection

Approved in Canada as Truvada for:

Pre-exposure prophylaxis (PrEP) for HIV-1 infection

Find a Clinic Near You

Who Is Running the Clinical Trial?

Gilead Sciences

Lead Sponsor

Trials

1,150

Recruited

878,000+

Daniel O'Day

Gilead Sciences

Chief Executive Officer since 2019

MBA from Columbia University

Dietmar Berger

Gilead Sciences

Chief Medical Officer

MD and PhD from Albert-Ludwigs University School of Medicine

National Institute on Drug Abuse (NIDA)

Collaborator

Trials

2,658

Recruited

3,409,000+

HIV Prevention Trials Network

Collaborator

Trials

Recruited

569,000+

National Institute of Allergy and Infectious Diseases (NIAID)

Collaborator

Trials

3,361

Recruited

5,516,000+

Published Research Related to This Trial

The fixed-dose combination (FDC) inhaler containing mometasone furoate and formoterol fumarate showed comparable pharmacokinetics to individual inhalers, indicating that the combination does not alter the absorption of either drug when used together.

In a study involving healthy subjects, the systemic exposure levels of mometasone furoate and formoterol were similar whether administered as a combination or as separate inhalers, suggesting that the FDC is safe and effective for asthma and potentially for COPD.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Evaluation of potential for pharmacokinetic interaction between mometasone furoate and formoterol fumarate after oral inhalation from a fixed-dose combination metered-dose inhaler device.Kosoglou, T., Hubbell, J., Johnson-Levonas, AO., et al.[2018]

In a 4-month study involving 2179 adult asthma patients, the extrafine formulation of beclomethasone/formoterol (BDP/F pMDI HFA) significantly improved asthma control, as shown by a decrease in the Asthma Control Questionnaire score from 1.62 to 0.94 (p < 0.001).

Patients reported better compliance with their medication, with those forgetting to take their medication dropping from 49.7% to 27.1% (p < 0.001), and most patients expressed satisfaction with the inhaler device, preferring it over dry powder inhalers.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Improvement of asthma control in adult patients using extrafine inhaled beclomethasone/formoterol fixed combination as maintenance therapy as well as maintenance and reliever therapy - CONTROL study.Dębowski, T., Marko, M., Rogala, B., et al.[2023]

The combination of tenofovir disoproxil fumarate (TDF) and emtricitabine (FTC) demonstrated additive to synergistic anti-HIV activity in vitro, particularly effective against both wild-type and mutant strains of the virus, based on studies in human T leukaemic cells and peripheral blood mononuclear cells (PBMCs).

Both drugs were efficiently converted to their active metabolites in the tested cells, with significant increases in the levels of these metabolites when used together, suggesting that their combined use enhances their effectiveness as a dual NRTI backbone in HIV-1 treatment.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

In vitro evaluation of the anti-HIV activity and metabolic interactions of tenofovir and emtricitabine.Borroto-Esoda, K., Vela, JE., Myrick, F., et al.[2015]

Citations

1.pmc.ncbi.nlm.nih.govpmc.ncbi.nlm.nih.gov/articles/PMC6453722/

Review of real-world implementation data on emtricitabine ...Patients should be made aware that PrEP is not 100% effective and will not prevent the acquisition of HIV strains resistant to FTC and TDF. Cost effectiveness.

2.jamanetwork.comjamanetwork.com/journals/jama/fullarticle/2816036

HIV Preexposure Prophylaxis With Emtricitabine and ...Indeed, participants with tenofovir diphosphate concentrations indicative of taking 4 to 6 doses per week had a nearly 90% HIV risk reduction in ...

3.clinicaltrials.govclinicaltrials.gov/study/NCT00458393

Study Details | NCT00458393 | Emtricitabine/Tenofovir ...This study will evaluate the safety and efficacy of chemoprophylaxis for HIV prevention in men who have sex with men (MSM) who are at high risk for HIV ...

4.pmc.ncbi.nlm.nih.govpmc.ncbi.nlm.nih.gov/articles/PMC12492902/

Long-term safety and efficacy of emtricitabine and tenofovir ...... emtricitabine and tenofovir disoproxil fumarate showed non-inferior efficacy for HIV prevention and improved bone mineral density and ...

5.thelancet.comthelancet.com/journals/lanhiv/article/PIIS2352-3018(21)00071-0/abstract

Long-term safety and efficacy of emtricitabine ... - The LancetApproximately 78–82% of participants reported taking study medication more than 95% of the time across all study visits.

6.accessdata.fda.govaccessdata.fda.gov/drugsatfda_docs/label/2013/021752s035lbl.pdf

Truvada (emtricitabine tenofovir disoproxil fumarate) tablets ...TRUVADA is indicated in combination with safer sex practices for pre-exposure prophylaxis (PrEP) to reduce the risk of sexually acquired HIV-1 in adults at high ...

7.gilead.comgilead.com/-/media/files/pdfs/medicines/hiv/truvada/truvada_pi.pdf

truvada_pi.pdfEmtricitabine: In addition to the adverse reactions reported in adults, anemia and hyperpigmentation were observed in 7% and 32%, respectively, of pediatric ...

8.mayoclinic.orgmayoclinic.org/drugs-supplements/emtricitabine-and-tenofovir-oral-route/description/drg-20061833

Emtricitabine and tenofovir (oral route) - Side effects & ...This medicine will not cure HIV infection or AIDS. It works by lowering the amount of HIV in the blood and helps the immune system. This may ...

9.accessdata.fda.govaccessdata.fda.gov/drugsatfda_docs/pepfar/090049PI.pdf

EMTRICITABINE AND TENOFOVIR DISOPROXIL FUMARATEEmtricitabine and tenofovir disoproxil fumarate tablets are not approved for the treatment of chronic HBV infection, and the safety and efficacy of ...

10.pmc.ncbi.nlm.nih.govpmc.ncbi.nlm.nih.gov/articles/PMC9010110/

Safety review of tenofovir disoproxil fumarate/emtricitabine ...In summary, TDF/FTC PrEP is a potent and recommended HIV prevention option, with a demonstrably good safety profile, including in pregnancy. While safety data ...

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