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 (SYMPHONY)

  • End date
    Jun 10, 2023
  • participants needed
  • sponsor
    Axsome Therapeutics, Inc.
Updated on 10 October 2022


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).


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.

Condition Narcolepsy, Cataplexy, Excessive Daytime Sleepiness
Treatment Placebo, AXS-12 (Reboxetine)
Clinical Study IdentifierNCT05059223
SponsorAxsome Therapeutics, Inc.
Last Modified on10 October 2022


Yes No Not Sure

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
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer  to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact


Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note