Study of Lenacapavir as a Once-Yearly Injection for HIV Pre-exposure Prophylaxis (PrEP)
PURPOSE 365
A Phase 3, Single-Arm Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of Once-Yearly Intramuscular Lenacapavir for HIV Pre-exposure Prophylaxis (PrEP) in People With an Indication for PrEP
1 other identifier
interventional
350
1 country
31
Brief Summary
The goal of this clinical study is to learn more about the study drug lenacapavir (LEN), safety, tolerability, and pharmacokinetics (how LEN is absorbed, modified, distributed, and removed from the body of the participants) of once-yearly intramuscular for HIV pre-exposure prophylaxis (PrEP) in people with an indication for PrEP. The primary objective of this study is to evaluate the pharmacokinetics (PK) and the safety and tolerability of intramuscular (IM) every 12 months (Q12M) LEN for PrEP among people with an indication for PrEP.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for phase_3
Started Jul 2025
Typical duration for phase_3
31 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
June 24, 2025
CompletedFirst Posted
Study publicly available on registry
July 2, 2025
CompletedStudy Start
First participant enrolled
July 22, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
September 1, 2028
ExpectedStudy Completion
Last participant's last visit for all outcomes
September 1, 2028
March 4, 2026
March 1, 2026
3.1 years
June 24, 2025
March 2, 2026
Conditions
Outcome Measures
Primary Outcomes (4)
Plasma LEN Ctrough at Week 52
Ctrough is defined as the concentration at the end of the dosing interval.
Week 52
Percentage of Participants Experiencing Treatment-emergent Adverse Event (TEAEs)
First dose up to 30 days post last dose (approximately 3 years)
Percentage of Participants Experiencing Treatment-emergent Clinical Laboratory Abnormalities
First dose up to 30 days post last dose (up approximately 3 years)
Percentage of Participants With Discontinuation due to Adverse Event
First dose up to 30 days post last dose (approximately 3 years)
Study Arms (2)
Lenacapavir (LEN)
EXPERIMENTALParticipants with an indication for pre-exposure prophylaxis will receive for approximately 52 weeks: * LEN 3000 mg injection once on Day 1 * Oral LEN 600 mg on Day 1 and Day 2 during the Main Study Period Participant will receive additional oral LEN if IM injection are not available. If participants choose to not receive additional LEN injections, they will continue onto the pharmacokinetic (PK) Tail Phase for up to 52 weeks.
LEN Extension Phase
EXPERIMENTALParticipants with an indication for pre-exposure prophylaxis will receive LEN 3000 mg injection once on Day 1 (approximately one year after their initial dose) during the Extension Phase. Participants will receive oral LEN if IM injections are not available. If participants choose to not receive additional LEN injections, they will continue onto the PK Tail Phase for up to 52 weeks.
Interventions
Eligibility Criteria
You may qualify if:
- At least 16 years of age at screening.
- Receptive anal or vaginal sex in the past 6 months and at least 1 of the following:
- Condomless receptive sex (vaginal or anal) with 1 or more sex partners of unknown HIV status during the past 6 months
- For a person who has engaged in anal sex in the past 6 months: diagnosis of syphilis, gonorrhea, or chlamydia in the past 6 months
- For a person who has engaged in vaginal sex in the past 6 months: diagnosis of syphilis or gonorrhea in the past 6 months
- Sex with partner known to be living with HIV with an unknown or detectable viral load in the past 6 months
- Negative local rapid fourth generation HIV-1/2 antibody (Ab)/antigen (Ag) test, central fourth generation HIV-1/2 Ab/Ag, and HIV-1 RNA quantitative nucleic acid amplification testing (NAAT) at screening.
You may not qualify if:
- Current signs or symptoms suggesting HIV infection
- Acute viral hepatitis A, B, or C or evidence of chronic hepatitis B or C infection
- Severe hepatic impairment or a history of or current clinical decompensated liver cirrhosis (eg, ascites, encephalopathy, variceal bleeding)
- Past or current participation in HIV vaccine or HIV broadly neutralizing antibody study unless participant provides documentation of receipt of placebo (ie, not active product)
- Prior use of oral LEN in the past 90 days or subcutaneous LEN in the past 18 months
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Gilead Scienceslead
Study Sites (31)
UAB Sexual Health Research Clinic
Birmingham, Alabama, 35233, United States
UCLA Clinic Care
Los Angeles, California, 90035, United States
Ruane Clinical Research Group, Inc.
Los Angeles, California, 90036, United States
UCLA Vine Street Clinic
Los Angeles, California, 90038, United States
Mills Clinical Research
Los Angeles, California, 90069, United States
BIOS Clinical Research
Palm Springs, California, 92262, United States
UCSD AntiViral Research Center (AVRC)
San Diego, California, 92103, United States
Bridge HIV, San Francisco Department of Public Health
San Francisco, California, 94102, United States
Yale University; School of Medicine; AIDS Program
New Haven, Connecticut, 06510, United States
Whitman-Walker Institute, Inc.
Washington D.C., District of Columbia, 20009, United States
Children's National Hospital
Washington D.C., District of Columbia, 20010, United States
Midway Immunology and Research Center
Ft. Pierce, Florida, 34982, United States
The ID Prevention Research Unit
Miami, Florida, 33136, United States
University of South Florida - Curran Children's Health Center
Tampa, Florida, 33606, United States
The Hope Clinic of Emory University
Atlanta, Georgia, 30030, United States
Ponce de Leon Center Clinical Research Site
Atlanta, Georgia, 30303, United States
University of Illinois-Chicago (UIC), Center for Dissemination and Implementation Sciences (CDIS)
Chicago, Illinois, 60612, United States
Howard Brown Health Center
Chicago, Illinois, 60613, United States
University Medical Center
New Orleans, Louisiana, 70119, United States
Johns Hopkins Hospital - Clinical Research Unit
Baltimore, Maryland, 21287, United States
Fenway Health
Boston, Massachusetts, 02215, United States
Be Well Medical Center
Berkley, Michigan, 48072, United States
Icahn School of Medicine at Mount Sinai - Clinical and Translational Research Center
New York, New York, 10029, United States
ICAP at Columbia University- Bronx Prevention Center
The Bronx, New York, 10451, United States
NC TraCS Institute - CTRC, University of North Carolina at Chapel Hill
Chapel Hill, North Carolina, 27599, United States
Penn Prevention Unit
Philadelphia, Pennsylvania, 19104, United States
Philadelphia FIGHT Community Health Centers, Jonathan Lax Treatment Center
Philadelphia, Pennsylvania, 19107, United States
St. Jude Children's Research Hospital
Memphis, Tennessee, 38105, United States
Central Texas Clinical Research
Austin, Texas, 78705, United States
The Crofoot Research Center
Houston, Texas, 77098, United States
Vaccine Trials Unit - Fred Hutchinson Cancer Center / University of Washington
Seattle, Washington, 98104, United States
Related Links
MeSH Terms
Interventions
Study Officials
- STUDY DIRECTOR
Gilead Study Director
Gilead Sciences
Central Study Contacts
Gilead Clinical Study Information Center
CONTACT
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- NON RANDOMIZED
- Masking
- NONE
- Purpose
- PREVENTION
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
June 24, 2025
First Posted
July 2, 2025
Study Start
July 22, 2025
Primary Completion (Estimated)
September 1, 2028
Study Completion (Estimated)
September 1, 2028
Last Updated
March 4, 2026
Record last verified: 2026-03
Data Sharing
- IPD Sharing
- Will not share