Study to Assess the Effects of Oral NMRA-335140 in Participants With Major Depressive Disorder
Trial Parameters
Brief Summary
This randomized, double-blind, placebo-controlled, multicenter study will evaluate the effects of NMRA-335140 (formerly BTRX-335140) on symptoms of depression in participants with Major Depressive Disorder (MDD). The study design consists of a Screening Period (up to 35 days), and a 6-week Treatment Period (during which participants will receive either NMRA-335140 or placebo). At the completion of the 6-week Treatment Period, participants who complete the study, provide informed consent, and meet the eligibility criteria may enter an open-label extension study (NMRA-335140-501).
Eligibility Criteria
Key Inclusion Criteria: * Have a primary Diagnostic and Statistical Manual of Mental Disorders Fifth Edition Text Revised (DSM-5-TR) diagnosis of MDD without psychotic features confirmed by Structured Clinical Interview for DSM 5 Disorders, Clinical Trials Version (SCID 5 CT) at screening (this may be a first or recurrent episode). * Participant's current major depressive episode must be confirmed by independent assessment. * The symptoms of the current MDD episode have been present for more than 4 weeks prior to the Screening Visit, but no longer than 12 months prior to the Screening Visit. * Have a MADRS total score of 25 or higher at Screening and Baseline. * A change in MADRS total score between Screening and Baseline of ≤20%. Key Exclusion Criteria: * Have failed 2 or more courses of antidepressant treatment at sufficient doses for at least 6 to 8 weeks for the current MDD episode. * Currently or in the past year have been diagnosed with a personality disorder per the DSM-5-TR or