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Brexanolone

Phase 3

Post Partum Depression | Small molecule | Psychiatry |Supernus Pharmaceuticals, Inc.|Last Updated: Sep 15, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
UNCONTROLLEDDMC
Total Trials1
Total Enrollment28
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03665038A Study to Assess the Safety of Brexanolone in the Treatment of Adolescent Female Participants With Postpartum Depression (PPD)PHASE3 COMPLETED 28Sep 7, 2018Jan 8, 2021Sep 15, 202517 United States
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Study Endpoints
Primary Endpoints
Number of Participants With Treatment-Emergent Adverse Events (TEAEs)
From first dose of study drug up to end of follow-up period (up to Day 30)

An adverse event (AE) is any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product. A TEAE is defined as an AE with onset on or after the start of study drug infusion, or any worsening of a pre-existing medical condition/AE with onset on or after the start of study drug infusion.

Secondary Endpoints
Area Under the Concentration-Time Curve (AUC) From Time Zero to 60 Hours (AUC0-60)
Day 1: From 0 hour (pre-infusion) and at 4, 8, 12, 24, 30, 36, 48 hours during the infusion; at 60 hours (end of infusion)
AUC From Time Zero to Infinity (AUCinf)
Day 1: From 0 hour (pre-infusion) and at 4, 8, 12, 24, 30, 36, 48 hours during the infusion; at 60 hours (end of infusion)
Maximum (Peak) Plasma Concentration (Cmax)
Day 1: From 0 hour (pre-infusion) and at 4, 8, 12, 24, 30, 36, 48 hours during the infusion; at 60 hours (end of infusion)
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
BrexanoloneEXPERIMENTALParticipants will receive a 60-hour single continuous IV infusion of brexanolone, at 30 mcg/kg/hour (0 to 4 hours), at 60 mcg/kg/hour (4 to 24 hours), at 90 mcg/kg/hour (24 to 52 hours), followed by a taper to 60 mcg/kg/hour (52 to 56 hours), and 30 mcg/kg/hour (56 to 60 hours) during the study.
Interventions
NameTypeDescription
BrexanoloneDRUGAdministered as IV infusion.
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Eligibility Criteria
Age Range15 Years — 17 Years
SexFEMALE
Healthy VolunteersNo
Study Sites17

Key Inclusion Criteria: 1. Participant has had a major depressive episode that began no earlier than the third trimester and no later than the first 4 weeks following delivery, as diagnosed by Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders (DSM-5) Axis I Dis...

Countries:United States
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