ALKS 2680 for reducing daytime sleepiness and cataplexy in adults with narcolepsy type 1
Official title: A Phase 3, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of ALKS 2680 in Adults With Narcolepsy Type 1 (Brilliance NT1 Study 302)
Run by Alkermes, Inc. · NCT07455383 · Data updated 2026-11-12
This study will test whether ALKS 2680 tablets can reduce daytime sleepiness, cataplexy, and other symptoms in adults with narcolepsy type 1.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 70 Years |
| Sex | All |
| Enrollment | 150 (estimated) |
| Sponsor | Alkermes, Inc. Industry-sponsored |
| Locations | 44 sites (Cullman, Alabama and 43 other locations) |
| Status | Recruiting |
| Started | April 6, 2026 |
| Main results expected | May 2027 |
| Study ends | June 2027 |
| Registry record updated | October 7, 2026 |
| Trial ID | NCT07455383 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults diagnosed with narcolepsy type 1 according to ICSD-3-TR and confirmed by PSG/MSLT or low CSF hypocretin-1 levels are ideal candidates.
✕Probably not a fit
People with other comorbid sleep disorders, significant uncontrolled medical conditions, recent participation in other interventional trials, or those who are pregnant or breastfeeding may not benefit or be eligible.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 3 interventional study enrolls adults with narcolepsy type 1 confirmed by ICSD-3-TR diagnostic testing (polysomnography/MSLT or CSF hypocretin-1). Participants will receive one of two doses of ALKS 2680 tablets or placebo and will be monitored for changes in daytime sleepiness, frequency of cataplexy, and other disease symptoms. Efficacy and safety endpoints compare symptom changes between dose groups and placebo over the treatment period. The study is sponsored by Alkermes and conducted at Alkermes investigational sites in Brandon, FL; Macon, GA; and Lansing, MI.
Why it matters
Potential benefit: If successful, ALKS 2680 could reduce daytime sleepiness and cataplexy, improving daily function and quality of life for people with narcolepsy type 1.
How similar studies have gone: Earlier-phase studies of ALKS 2680 suggested potential benefit, but this Phase 3 trial is designed to confirm efficacy and safety in a larger group.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Meets the diagnostic criteria of NT1 according to ICSD-3-TR guidelines, confirmed by diagnostic evaluations (either PSG/MSLT\* or CSF hypocretin-1 level). Exclusion Criteria: * Has another comorbid sleep disorder or condition that may influence the sleep-wake cycle. * Has a history or presence at Visit 1 of other clinically significant (treated or untreated) illness, disease, abnormality, or surgical procedure that, in the opinion of the Investigator, might compromise participant safety, interfere with any study assessment, or affect the participant's ability to complete the study. * Is currently enrolled in another interventional clinical trial or has received any investigational drug or used any interventional investigational device within 30 days prior to Visit 1. Participants previously enrolled in Study ALKS 2680-201 are not eligible for enrollment. * Is currently pregnant, breastfeeding, or is planning to become pregnant during the study
Where it's running
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Alkermes Investigational Site
Cullman, Alabama, United States Recruiting -
Alkermes Investigational Site
Phoenix, Arizona, United States Recruiting -
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Los Angeles, California, United States Recruiting -
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Boulder, Colorado, United States Recruiting -
Alkermes Investigational Site
Brandon, Florida, United States Recruiting -
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Miami, Florida, United States Recruiting
Show 38 more locations
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Alkermes Investigational Site
Winter Park, Florida, United States Recruiting -
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Macon, Georgia, United States Recruiting -
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Kansas City, Kansas, United States Recruiting -
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Newton, Massachusetts, United States Recruiting -
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Lansing, Michigan, United States Recruiting -
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Novi, Michigan, United States Recruiting -
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St Louis, Missouri, United States Recruiting -
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Middletown, New Jersey, United States Recruiting -
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Charlotte, North Carolina, United States Recruiting -
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Cincinnati, Ohio, United States Recruiting -
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Wyomissing, Pennsylvania, United States Recruiting -
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Columbia, South Carolina, United States Recruiting -
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Austin, Texas, United States Recruiting -
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San Antonio, Texas, United States Recruiting -
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Sugar Land, Texas, United States Recruiting -
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Madison, Wisconsin, United States Recruiting -
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Macquarie Park, New South Wales, Australia Recruiting -
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Bruges, Belgium Recruiting -
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Edegem, Belgium Recruiting -
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Ghent, Belgium Recruiting -
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Namur, Belgium Recruiting -
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Markham, Ontario, Canada Recruiting -
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Toronto, Ontario, Canada Recruiting -
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Bordeaux, France Recruiting -
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Lyon, France Recruiting -
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Montpellier, France Recruiting -
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Verona, Italy Recruiting -
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Kitakyushu-shi, Fukuoka, Japan Recruiting -
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Osaka, Osaka, Japan Recruiting -
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Shibuya-ku, Tokyo-To, Japan Recruiting -
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Shinjuku-Ku, Tokyo-To, Japan Recruiting -
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Kumamoto, Japan Recruiting -
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Zwolle, Overijssel, Netherlands Recruiting -
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Heeze, Netherlands Recruiting -
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Vitoria-Gasteiz, Alava, Spain Recruiting -
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Barcelona, Barcelona, Spain Recruiting -
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Madrid, Spain Recruiting -
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Kaohsiung City, Taiwan Recruiting
Study contacts
- Study coordinator: Director, Clinical Trial Manager
- Email: clinicaltrials@alkermes.com
- Phone: 888-235-8008 (US Only)
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Temporal interference stimulation for narcolepsy type 1
A noninvasive brain stimulation test to see if theta-burst temporal interference can help people with narcolepsy type 1.
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Long-term test of TAK-360 in people with narcolepsy or idiopathic hypersomnia
This study tests TAK-360 over an extended period to see if it is tolerable for people with narcolepsy type 1, narcolepsy type 2, or idiopathic hypersomnia who completed an earlier TAK-360 trial.
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TAK-360 in adults with narcolepsy Type 1 with cataplexy
This study tests TAK-360 versus placebo in adults with narcolepsy Type 1 to see if it is safe and tolerable.
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Test of Cleminorexton vs placebo for central hypersomnolence in NT1/NT2
This study tests cleminorexton to see if it helps daytime sleepiness in adults with Narcolepsy Type 1 or Type 2 compared with a placebo.
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ALKS 2680 in adults with narcolepsy type 1: see if it helps daytime sleepiness and cataplexy
This study tests whether ALKS 2680 helps reduce daytime sleepiness and cataplexy in adults with narcolepsy type 1 compared with a placebo.
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Pain testing for people with idiopathic REM sleep behavior disorder
This study will test whether people with idiopathic REM sleep behavior disorder feel and report pain differently using brief thermal pain tests and questionnaires.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.