Skip to content

A Study to Assess the Long-term Efficacy and Safety of AXS-12 (Reboxetine) in Subjects With Narcolepsy (ENCORE)

A Study to Assess the Long-term 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
NCT05113745
Enrollment
68
Registered
2021-11-09
Start date
2021-10-20
Completion date
2024-11-15
Last updated
2025-11-13

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 will evaluate the long-term efficacy and safety of AXS-12 in narcoleptic subjects with cataplexy and excessive daytime sleepiness (EDS).

Detailed description

This study is a multi-center trial consisting of a 24-week open-label period, followed by a 4-week double-blind, placebo-controlled, randomized withdrawal period. At the Week 24 visit, subjects will be randomized in a 1:1 ratio either to continue to receive AXS-12 or to switch to placebo, for the next 4 weeks. Eligible subjects will have previously participated in the AXS-12-301 study.

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)

Intervention model description

Open-label treatment period, followed by a double-blind treatment period.

Eligibility

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

Inclusion criteria

* Completed the treatment period of Study AXS-12-301 * Willing and able to comply with the study requirements

Exclusion criteria

* Significant change in medical history or concomitant medications since enrolling in the AXS-12-301 study which, in the opinion of the Investigator, would render the subject unsuitable to receive AXS-12

Design outcomes

Primary

MeasureTime frame
Long-term safety as measured by the incidence of treatment-emergent adverse eventsUp to 28 weeks
Efficacy as measured by change in frequency of cataplexy attacks from baseline.Baseline to Week 27

Countries

Canada, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026