NOTRE: Optimizing Long-Acting Pre-Exposure Prophylaxis and Medications for Opioid Use Disorder Interventions in Carceral Settings

Inclusion Criteria: 1. Adults (age 18) at a participating carceral site; 2. Eligible for release within 120 days (sentenced and/or pretrial). Individuals who might be sentenced to federal prison will be excluded; 3. History of OUD (meeting DSM-5 criteria of moderate or severe opioid use disorder at the time of incarceration; individuals not meeting the opioid-disorder criterion will be eligible if they were treated in an opioid agonist treatment program during the year before incarceration or met OUD criteria in the year prior to incarceration); 4. HIV negative (as confirmed by a HIV rapid test); 5. Clinically indicated for PrEP based on CDC guidelines during incarceration and/or the year prior to incarceration; 6. Willing to enroll in buprenorphine treatment and PrEP and be randomized to either study arm; and 7. Report that, during community re-entry they will reside in the geographic locations of the study. Exclusion Criteria: 1. Liver function test levels greater than four times normal (if we are unable to obtain labs, a determination by our site partner physicians will be made to allow inclusion); 2. Active medical illness that may make participation hazardous (e.g., unstable diabetes, heart disease; renal impairment, Hepatitis B); 3. Conditions or medications that may predispose to QTc prolongation (personal or family history of long QT syndrome, hypokalemia, medications that prolong QTc interval, e.g., macrolide antibiotics, azole antifungal compounds, anti-arrhythmics, antipsychotics and antidepressants); 4. Untreated psychiatric disorder that may make participation hazardous (e.g., untreated psychosis, treated psychiatric disorders will be allowed); 5. Known allergic reaction to PrEP or buprenorphine; and 6. Suicidal ideation.