JNJ-67953964

A Study to Investigate the Effect of JNJ-67953964 on Gastric Mucosal Integrity in Healthy Male and Female Participants

A Study of JNJ-67953964 in Healthy Japanese Adult Male Participants

A Study to Explore the Efficacy of JNJ-67953964 in the Treatment of Depression

An Open-label, Long-term, Safety and Efficacy Study of Aticaprant as Adjunctive Therapy in Adult and Elderly Participants With Major Depressive Disorder (MDD)

A Randomized, Double-blind, Multicenter, Placebo-controlled Study to Evaluate the Efficacy, Safety, and Tolerability of Aticaprant 10 mg as Adjunctive Therapy in Adult Participants with Major Depressive Disorder (MDD) with Moderate-to-severe Anhedonia and Inadequate Response to Current Antidepressant Therapy and an Open-label Long-term Extension Treatment with Aticaprant

A Randomized, Double-blind, Multicenter, Placebo-controlled Study of Adjunctive Aticaprant Plus an Antidepressant for Relapse Prevention in Major Depressive Disorder (MDD) With Moderate-to-severe Anhedonia