A Multi-Center Assessment of an Intervention to Provide Long-Acting Cabotegravir Injectable Pre-Exposure Prophylaxis to People Who Inject Drugs

This is a Phase IV open-label single arm implementation study of the on-label use of an FDA approved drug, cabotegravir, as long-acting, injectable HIV pre-exposure prophylaxis (CAB-LA) among people who inject drugs. All enrollees will be prescribed CAB-LA based on CAB-LA's FDA approved indication, which is sexual risk of HIV transmission. Investigators will recruit participants from two sites in Boston, Massachusetts. The target study sample size is 100 participants.

Recruitment will be primarily by clinician referrals and medical records review at each site.

The study team will screen potential participants at both sites and assess their initial eligibility. Participants will be eligible to participate if they meet the inclusion and exclusion criteria. If an individual consents to participation, a 4th generation antibody/antigen (Ab/Ag) screening test (rapid or lab-based) and a confirmatory HIV-1 RNA test will be sent. If the HIV Ab/Ag screening test is negative, individuals will be enrolled.

Once a participant is enrolled, the participant will return 0-7 days later to complete a medical evaluation by a medical provider who will prescribe CAB-LA, and the participant will complete an enrollment survey. After the enrollment survey, participants will receive the first CAB-LA injection according to label instructions. The second injection visit will occur 1 month after the first injection. Thereafter, CAB-LA will be administered every 2 months for three additional doses. Thus, participants will remain in the study for seven months. CAB-LA for the study is supplied by ViiV Healthcare Ltd.

At each CAB-LA injection visit after the first one, participants will be asked to complete a short survey. A longer survey will be administered at the final study visit for each participant regarding acceptability of the intervention.