Janssen Research & Development, LLC
The main purpose of this study is to assess how well the study drug (JNJ-42847922) works (efficacy) compared with placebo in improving depressive symptoms in participants with major depressive disorder (\[MDD\], a common mood disorder that causes a lasting feeling of sadness and a loss of interest in everyday activities) in double-blind treatment phase. Further, to evaluate long-term safety and tolerability of JNJ-42847922 in participants with MDD in the open label treatment phase.
Inclusion criteria: * Meet diagnostic and statistical manual of mental disorders-5th edition (DSM-5) diagnostic criteria for major depressive disorder (MDD), without psychotic features based upon clinical assessment and confirmed by the SCID-CT diagnosed with first depressive episode prior to age 55 * Experienced at least one MDD episode prior to their current episode based on clinician-confirmed MDD diagnosis/MDE and documented in source records * Current episode of MDD must be a minimum of 8 weeks in duration and maximum of 24 months duration * Must meet one of the following criteria regard…
Seltorexant tablet will be administered orally.
Placebo tablet will be administered orally.