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Zuranolone

Phase 1FDA approved

Major Depressive Disorder | Small molecule | Psychiatry |Biogen Inc.|Trials Updated: Mar 26, 2025

Zuranolone development status

FDA approval on record Aug 4, 2023 as Zurzuvae
Approval holderBiogen
ApplicationNDA217369
Highest phase Phase 1
Registered trials 3 across 1 sponsor since Dec 2022

Label indication ZURZUVAE is indicated for the treatment of postpartum depression (PPD) in adults. ZURZUVAE is a neuroactive steroid gamma-aminobutyric acid (GABA) A receptor positive modulator indicated for the treatment of postpartum depression (PPD) in adults. ( 1 ) FDA label

Zuranolone target and mechanism

Molecular targetGABRA1, GABRB2, GABRG2, GABRB3, GABRA4, GABRG3
Target classPositive Allosteric Modulator
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment19

FDA Designations

PRIORITY_REVIEW

Zuranolone clinical trials

Zuranolone · 1 trial · 1 indication

Phase 1 1
NCT05655507Zuranolone Pharmacokinetics (PK) and Safety Study Adolescent Participants With Major Depressive Disorder (MDD)Major Depressive Disorder
COMPLETED19 Analytics
PHASE1COMPLETED
Zuranolone Pharmacokinetics (PK) and Safety Study Adolescent Participants With Major Depressive Disorder (MDD)
Major Depressive DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

Plasma Concentrations of Zuranolone
At multiple timepoints post dose on Days 1, 8 and 15

PK Parameters of Zuranolone will be assessed.

Secondary Endpoints

Percentage of Participants With at Least one Treatment Emergent Adverse Event (TEAE)
Up to 42 days
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ZuranoloneEXPERIMENTALParticipants will be enrolled to receive Zuranolone orally, during the daytime on Day 1 and in the evening on Days 2 to 14. The first 10 enrolled participants will receive 50 mg (participants with a body weight of 54 kg or greater) or 40 mg (participants with a body weight less than 54 kg) once daily. The remaining participants will receive 40 mg once daily with the opportunity to down titrate to 30 mg if 40 mg is not tolerated.

Interventions

NameTypeDescription
ZuranoloneDRUGAdministered as capsules
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Eligibility Criteria

Age Range12 Years to 17 Years
SexFEMALE
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: * Participant meets Kiddie Schedule for Affective Disorders and Schizophrenia - Present and Lifetime DSM-5 (KSADS-PL DSM-5) criteria for MDD. * Participant has a Children's Depression Rating Scale-Revised (CDRS-R) total score greater than or equal to 40 at screening and Day 1. *...

Countries:United States
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Frequently asked questions about Zuranolone

What is Zuranolone used for?

Zuranolone is being developed for the treatment of major depressive disorder. The clinical program described here focuses on adolescent participants with major depressive disorder, a psychiatric condition in the therapeutic area of psychiatry. Zuranolone is a small molecule and remains in clinical development.

What does Zuranolone target?

Zuranolone targets GABA-A receptor subunits, specifically GABRA1, GABRB2, GABRG2, GABRB3, GABRA4, and GABRG3. It acts as a positive allosteric modulator at these receptors. This target class places it among compounds that modulate GABA-A receptor signaling rather than acting as direct receptor agonists.

Who is developing Zuranolone?

Biogen Inc. is developing Zuranolone. Biogen trades on the Nasdaq under the ticker BIIB. The company is the sponsor associated with the clinical development program for this asset in major depressive disorder.

What phase is Zuranolone in?

Zuranolone is in Phase 1 clinical development. It is investigational and has not been approved. The program includes one completed Phase 1 trial, and no active trials are currently listed. A priority review designation is associated with this asset.

What clinical trials is Zuranolone in?

Zuranolone has been studied in the completed Phase 1 trial NCT05655507, titled Zuranolone Pharmacokinetics (PK) and Safety Study in Adolescent Participants With Major Depressive Disorder. That trial enrolled 19 participants in the United States, included females aged 12 years and older, and was an uncontrolled study without randomization or blinding.