GLP-1R Agonist Treatment for Opioid Use Disorder

Inclusion Criteria: * Age 18 to 75 years. * Body mass index (BMI) \> 18. * Able and willing to provide informed consent prior to any study-related activities. * Current diagnosis of Diagnostic and Statistical Manual Diploma in Social Medicine (DSM)-5 Opioid Use Disorder (OUD) as per the Mini International Neuropsychiatric Interview (MINI) or per the site clinic diagnosis. Patients are eligible if they have a MINI \> 3 ("moderate" or "severe" in the "Specify If" box in the Substance Use Disorder (Non-Alcohol) module for the category of opiates). * Currently receiving outpatient treatment for OUD and at least 2 weeks on buprenorphine (BUP) or 4 weeks on methadone at the study site and/or at an associated clinic at the time of enrollment. * Have at least 1 urine test positive for opioids after 2 weeks on BUP or 4 weeks on methadone. * Have positive self-reporting of opioid use after 2 weeks on BUP or 4 weeks on methadone. * If anatomically capable of becoming pregnant and of childbearing age, is not pregnant (confirmed) or breastfeeding at the time of enrollment and agrees to use a medically accepted method of birth control or to abstain from sexual intercourse while in the study. * Able to read and communicate in English to the level required to accept standard care and complete all study requirements. * Able and willing to engage/adhere to the entirety of the study protocol (19 weeks). * Not currently a prisoner. Exclusion Criteria: * Age \< 18 or \> 75 years. * BMI \<18. *…