Evaluating NBI-1065845 as an Add-On Treatment to Prevent Relapse in Adults with Major Depressive Disorder

What this Trial Is About

Researchers are evaluating the effectiveness of NBI-1065845 compared with a placebo as an additional treatment to delay the return of depressive symptoms in people with major depressive disorder MDD. This Phase 3 study focuses on maintaining the treatment effect in participants diagnosed with recurrent moderate or severe MDD or persistent depressive disorder who have not fully responded to oral antidepressants. Participants first receive NBI-1065845 during an open-label treatment period. Then, in a randomized, double-blind phase, participants are assigned to either continue NBI-1065845 or switch to a matching placebo. The study uses oral tablets for both NBI-1065845 and placebo treatments and follows a parallel study model. Throughout the trial, participants will be monitored for relapse of depressive symptoms using the Hamilton Depression Rating Scale and other assessments. The primary outcome is the time from randomization until relapse or study end, lasting up to approximately 32 months. Participants must continue their antidepressant treatments at the same dose during the study and comply with all procedures and restrictions. Safety and adherence are closely observed by the investigators during the entire study period.

A Study to Evaluate the Maintenance Effect of NBI-1065845 as an Adjunctive Treatment in Participants With Major Depressive Disorder (MDD)