HPTN 083

A Phase 2b/3 Double Blind Safety and Efficacy Study of Injectable Cabotegravir Compared to Daily Oral Tenofovir Disoproxil Fumarate/Emtricitabine For Pre-Exposure Prophylaxis in HIV-Uninfected Men and Transgender Women Who Have Sex With Men

The purpose of this study is to evaluate the safety and efficacy of the injectable drug cabotegravir (CAB LA), for pre-exposure prophylaxis (PrEP) in HIV-uninfected cisgender men and transgender women who have sex with men (MSM and TGW).

This study will enroll HIV-uninfected MSM and TGW at risk for acquiring HIV infection. Participants will be followed for a total of 4 years.

Participants will attend up to 47 study visits throughout the study. Visits may include physical examinations, blood collection, urine collection, an electrocardiogram (ECG), and rectal swab collection. Some participants may have a bone mineral density-energy x-ray absorptimetry (DXA) scan at select visits.

All participants will be transitioned to locally available HIV prevention services, including services for PrEP, if available, at the end of their participation in the study.

HPTN 083-01 is a sub-study of HPTN 083. The purpose of this study is to evaluate the safety, tolerability, and acceptability of CAB LA for the prevention of HIV among adolescent males. Participants will receive oral CAB for 5 weeks, followed by 29 weeks on CAB LA, then quarterly visits for 48 weeks after final injection. All participants who have received at least one injection will be followed for 48 weeks after their last injection. Total study duration per participant will be approximately 21 months.

HPTN 083-02 is a qualitative sub-study of participants enrolled in HPTN 083. The purpose of this study is to explore potential barriers, facilitators, and potentially modifiable issues related to adherence to clinic visits in the context of injectable PrEP; to learn about preferences and decision making regarding the use of oral versus injectable PrEP, or other biomedical prevention products; and to gather explanatory qualitative data regarding participants' experiences in HPTN 083 to better interpret study results and guide next prevention strategies. Participants in this sub-study will complete one individual semi-structured qualitative interview.