Jul 21 2025
Alkermes Announces Positive Topline Results From Vibrance-1 Phase 2 Study of Once-Daily Alixorexton in Patients With Narcolepsy Type 1

DUBLIN, July 21, 2025 /PRNewswire/ — Alkermes plc (Nasdaq: ALKS) today announced positive topline results from the randomized double-blind treatment period of the Vibrance-1 phase 2 study evaluating alixorexton in patients with narcolepsy type 1 (NT1). Alixorexton, formerly referred to as ALKS 2680, is the company’s novel, investigational, oral orexin 2 receptor (OX2R) agonist in phase 2 development as a once-daily treatment for NT1, narcolepsy type 2 (NT2) and idiopathic hypersomnia (IH). In Vibrance-1, alixorexton met the primary endpoint across all doses tested, demonstrating statistically significant, clinically meaningful and dose-dependent improvements from baseline compared to placebo in wakefulness on the Maintenance of Wakefulness Test (MWT). In addition to achieving normative wakefulness across all dose groups on the MWT (mean sleep latency >20 minutes), once-daily alixorexton demonstrated robust and clinically meaningful improvements compared to placebo on patient-reported outcomes related to excessive daytime sleepiness and other key symptoms such as fatigue and cognition. Alixorexton was generally well tolerated at all doses tested. These data support rapid initiation of a global phase 3 program of alixorexton in patients with NT1.

Check out the full article here.