Skip to content

A Study to Assess the Efficacy and Safety of AXS-12 (Reboxetine) in Patients With Narcolepsy

A Randomized, Double-Blind, Placebo-Controlled, Multi- Center Study to Assess the Efficacy and Safety of AXS-12 in the Treatment of Cataplexy and Excessive Daytime Sleepiness in Subjects With Narcolepsy

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05059223
Acronym
SYMPHONY
Enrollment
90
Registered
2021-09-28
Start date
2021-09-15
Completion date
2024-03-15
Last updated
2026-05-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cataplexy, Excessive Daytime Sleepiness, Narcolepsy

Keywords

AXS-12, Narcolepsy, Cataplexy, Excessive daytime sleepiness, Reboxetine, Axsome

Brief summary

This study is a multi-center, double-blind, placebo-controlled, randomized Phase 3 trial to assess the safety and efficacy of AXS-12 in narcoleptic subjects with cataplexy and excessive daytime sleepiness (EDS).

Detailed description

Eligible subjects must have a diagnosis of narcolepsy per the International Classification of Sleep Disorders (ICSD-3), and exhibit symptoms of both cataplexy and EDS. Subjects meeting the entry criteria will be randomized in a 1:1 ratio to receive either AXS-12 or placebo for five weeks.

Interventions

AXS-12 tablets, taken twice daily

DRUGPlacebo

Placebo tablets, taken twice daily

Sponsors

Axsome Therapeutics, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
15 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

* Male or female subjects between 15 and 75 years of age, inclusive * Primary diagnosis of narcolepsy with cataplexy * Willing and able to comply with the study requirements

Exclusion criteria

* Other clinically significant conditions potentially causing EDS * Clinically significant psychiatric disorders

Design outcomes

Primary

MeasureTime frameDescription
Frequency of cataplexy attacksChange from Baseline to Week 5Average number of cataplexy attacks per week

Countries

Canada, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 29, 2026