Skip to content

A Study to Evaluate the Efficacy, Safety and Tolerability of ALKS 2680 in Adults With Narcolepsy Type 1 (Brilliance NT1 - 304)

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 304)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07540897
Enrollment
150
Registered
2026-04-21
Start date
2026-08-13
Completion date
2027-07-01
Last updated
2026-09-03

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

Conditions

Narcolepsy Type 1

Keywords

Narcolepsy Type 1, NT1, Alixorexton, Sleepiness, Orexin-2, Orexin-2 receptor agonist, sleep disorder, excessive daytime sleepiness

Brief summary

The purpose of this study is to measure decreases in daytime sleepiness, cataplexy (sudden loss of muscle tone), and disease symptoms in participants with NT1 when taking ALKS 2680 tablets compared with placebo tablets.

Interventions

Participants will receive ALKS 2680 tablets, daily, orally, for 12 weeks

Participants will receive ALKS 2680 tablets, daily, orally, for 12 weeks

DRUGPlacebo

Participants will receive placebo tablets, daily, orally for 12 weeks

Sponsors

Alkermes, Inc.
Lead SponsorINDUSTRY

Study design

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

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No

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.

Design outcomes

Primary

MeasureTime frame
Change in mean sleep latency (MSL) on Maintenance of Wakefulness Test (MWT) from baseline to Week 12 by dose levelBaseline to Week 12

Secondary

MeasureTime frame
Change in Epworth Sleepiness Scale (ESS) from baseline to Week 12 by dose levelBaseline to Week 12
Weekly cataplexy rate (WCR) at Week 12 by dose levelWeek 12
Percentage of participants who achieve a status of "none" or "mild" on Patient Global Impression- Severity (PGI-S) scale(general disease) at Week 12 by dose levelWeek 12
Change in British Columbia Cognitive Complaints Inventory (BC-CCI) from baseline to Week 12 by dose levelBaseline to Week 12
Change in number of lapses on Psychomotor Vigilance Task (PVT) from baseline to Week 12 by dose levelBaseline to Week 12
Change in Patient-Reported Outcomes Measurement Information System - Fatigue 6a (PROMIS Fatigue 6a) from baselineto Week 12 by dose levelBaseline to Week 12
Percentage of participants who achieve a status of "normal, not ill at all", "borderline ill", or "mildly ill" on Clinical Global Impression-Severity (CGI-S) (general disease) at Week 12 by dose levelWeek 12
Change in Narcolepsy Severity Scale for Clinical Trials (NSS-CT) from baseline to Week 12 by dose levelBaseline to Week 12
Incidence of treatment emergent adverse eventsBaseline to Week 14

Countries

Canada, Poland, United States

Contacts

CONTACTDirector, Clinical Trial Manager
clinicaltrials@alkermes.com888-235-8008 (US Only)
STUDY_DIRECTORMedical Director, MD

Alkermes, Inc.

Outcome results

None listed

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