Opioid Use Disorder, Severe

This study is testing whether offering buprenorphine treatment directly at syringe service programs (SSPs) helps more people start and stay in treatment for opioid use disorder (OUD) than referring them to community buprenorphine treatment providers. Buprenorphine is a medication that helps reduce opioid cravings and withdrawal symptoms. The study compares two ways of connecting people to treatment: Referral to a community treatment provider (usual care before the new program begins). Onsite, low-threshold buprenorphine treatment at the SSP, which allows participants to start medication quickly and without having to establish care at another provider. Participants will be adults who have opioid use disorder and are SSP clients. Each SSP will begin offering the new onsite buprenorphine program at different times during the study. Researchers will collect information before and after the new program begins to see how it affects treatment engagement and health outcomes. The study will also examine how easy or difficult it is for SSPs to start and run the new program, how acceptable it is to staff and participants, and whether it is cost-effective. The overall goal is to find better ways to expand access to life-saving opioid treatment in community-based settings.

The primary objective of this study is to evaluate the ability of TRTME to increase initiation of MOUD outpatient treatment and MOUD knowledge in hospitalized patients with OUD deemed to be good candidates for MOUD by the UCMC Addiction Consult Team (ACT). The secondary objective is to evaluate the ability of TRTME to decrease stigma and increase drug self-efficacy.

The primary objective of this research study is to evaluate the effect of tirzepatide, relative to placebo, as an adjunct to BUP on retention, substance use, and sleep outcomes in individuals with OUD.

The goal of this clinical trial is to investigate the safety and efficacy of applying low-intensity focused ultrasound targeting the nucleus accumbens in individuals with opioid or amphetamine use disorders. The main questions it aims to answer is: \- Low-intensity focused ultrasound targeting the nucleus accumbens demonstrates sufficient safety and predictable therapeutic efficacy in individuals with opioid or amphetamine use disorders. Participants will: * Received Low-intensity focused ultrasound neuromodulation once * Visit the clinic for checkups and asessment at 1 week, 1 month, 3 months, 6 months, 9 months, 1 year, 1.5 years, and 2 years after received Low-intensity focused ultrasound neuromodulation.

The purpose of this clinical trial is to develop and test whether a text- and web-based tool called FamilyCHESS - designed for individuals with opioid use disorder (OUD) and a concerned significant other (CSO) - can help the identified patient (IP) begin and stay on medication for opioid use disorder (MOUD).