Buprenorphine for Individuals in Jail

Inclusion Criteria: * Adult male or female inmates at participating jail who are eligible for release within 120 days (sentenced and/or pretrial \[note: individuals who might be sentenced to state/federal prison will be excluded\]); Those individuals who are pre-trial and/or sentenced who are completing their sentence in the community (probation, parole, home detention, electronic monitoring, drug or other treatment court \[or equivalent\]) will be eligible to participate; * History of opioid use disorder (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); * Suitability for XR-B and/or SL-B treatment as determined by medical evaluation; * Willingness to enroll in XR-B or SL-B treatment in jail and continue in the community; * Planning to live in Baltimore City or the Baltimore Region; Exclusion Criteria: * Liver function test levels greater than 5 times normal (if we are unable to obtain labs, a determination by the study physician will be made to allow inclusion); * Active medical illness that may make participation hazardous (e.g., unstable diabetes, heart disease; moderate to severe renal impairment; adequately treated medical conditions are acceptable); * 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-arrythmics, antipsychotics and antidepressant); * Untreated psychiatric disorder that may make participation hazardous (e.g., untreated psychosis, bipolar disorder with mania; adequately treated psychiatric disorders and appropriate psychotropic medications will be allowed); * History of allergic reaction to buprenorphine; * Suicidal ideation (within the past 6 months); * Inability to pass a study enrollment quiz; and * Currently receiving non-buprenorphine MOUD in jail (methadone, naltrexone).