Moorpark

Researchers are studying the safety and effectiveness of brenipatide, given alongside standard treatment, compared to a placebo with standard treatment, to see if it can delay the return of symptoms in adults with major depressive disorder. This is a Phase 3, randomized, double-blind study involving adult participants aged 18 to 75 years. The trial is designed to assess how long it takes for depression symptoms to relapse after starting the adjunctive treatment. Participants will receive either brenipatide or placebo, both administered by subcutaneous injection, in addition to their stable standard of care medication. The study has three main periods: a screening period lasting about one month, followed by a treatment phase of at least 12 months where participants receive the assigned injections, and finally a follow-up period of roughly two months. The total time in the study can be shorter if symptoms worsen or if a participant withdraws. During the trial, participants will need to attend scheduled visits, self-inject the study drug, maintain study diaries, and complete questionnaires. Researchers will monitor participants closely to determine the time until relapse of major depressive disorder symptoms occurs. Safety and adherence to study procedures will be tracked throughout the trial, with the primary outcome measuring the number of days from randomization until relapse.