A Study of Aticaprant Plus an Antidepressant to Prevent Return of Depression Symptoms in Participants With Major Depressive Disorder Who Experience a Loss of Interest and Pleasure

The purpose of this study is to assess how well aticaprant works compared to placebo when given in addition to antidepressant therapy (selective serotonin reuptake inhibitor \[SSRI\] or serotonin-norepinephrine reuptake inhibitor \[SNRI\]) in preventing return of depression symptoms in participants with major depressive disorder who experience a loss of interest and pleasure and who achieve a stable response after treatment with adjunctive aticaprant.