Phase 2 Study of Brenipatide Added to Buprenorphine for Treating Opioid Use Disorder with or without Naloxone

What this Trial Is About

Researchers are evaluating brenipatide alongside buprenorphine, with or without naloxone, to assess its safety and effectiveness in people with opioid use disorder. This Phase 2 study includes two separate participant groups Part A involves a double-blind treatment phase with a later open-label extension, and Part B features an open-label treatment phase. Participants join only one part of the study. In Part A, participants receive either brenipatide or a placebo by subcutaneous injection plus buprenorphine taken under the tongue or inside the cheek. Part B participants receive open-label brenipatide injections with buprenorphine. The maximum study participation duration is about 144 weeks for Part A and 116 weeks for Part B, depending on enrollment timing and pace. Treatments are given as subcutaneous injections and transmucosal buprenorphine. Participants will attend regular study visits to monitor opioid use through urine drug screens and self-reports, track adherence to buprenorphine, and assess cravings and quality of life. Other measurements include changes in body weight, blood pressure, and healthcare visits. Safety is monitored throughout, and the main outcome focuses on weeks of abstinence from opioid use between weeks 13 and 24. Total participation time varies with study part and enrollment timing.

A Study of Brenipatide in Participants With Opioid Use Disorder