A Study of Rapastinel as Adjunctive Therapy in Major Depressive Disorder (RAP-MD-01)

A Randomized, Double-blind, Placebo-controlled, Multicenter Study of Rapastinel as Adjunctive Therapy in Major Depressive Disorder

This study will evaluate the efficacy, safety, and tolerability of rapastinel 450 mg compared to placebo adjunctive to antidepressant therapy (ADT) in patients with major depressive disorder (MDD) who have a partial response to ADT.

Inclusion Criteria:

• Meet Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria for MDD
• Current major depressive episode of at least 8 weeks and not exceeding 18 months in duration at Visit 1
• Have no more than partial response (< 50% improvement) to ongoing treatment with a protocol-allowed antidepressant
• If female of childbearing potential, have a negative serum β-human chorionic gonadotropin (β-hCG) pregnancy test.

Exclusion Criteria:

• DSM-5-based diagnosis of any disorder other than MDD that was the primary focus of treatment within 6 months before Visit 1

• Lifetime history of meeting DSM-5 criteria for:

  1. Schizophrenia spectrum or other psychotic disorder
  2. Bipolar or related disorder
  3. Major neurocognitive disorder
  4. Neurodevelopmental disorder of greater than mild severity or of a severity that impacts the participant's ability to consent, follow study directions, or otherwise safely participate in the study
  5. Dissociative disorder
  6. Posttraumatic stess disorder
  7. MDD with psychotic features

• Significant suicide risk, as judged by the Investigator.