DUBLIN , Aug. 22, 2024 /PRNewswire/ -- Alkermes plc (Nasdaq: ALKS ) today announced initiation of the Vibrance-2 study, a phase 2 clinical trial evaluating the safety and efficacy of ALKS 2680 compared to placebo in adults with narcolepsy type 2 (NT2). ALKS 2680 is the company's novel, investigational, oral, selective orexin 2 receptor (OX2R) agonist in development as a once-daily treatment for narcolepsy, a chronic, neurological disorder characterized by excessive daytime sleepiness.

"We are pleased to initiate Vibrance-2, a phase 2 clinical study for adults with narcolepsy type 2, based on the data from our phase 1, proof-of-concept study in this patient population. ALKS 2680 is the most advanced investigational orexin 2 receptor agonist currently in development for narcolepsy type 2," said Craig Hopkinson , M.D.

, Chief Medical Officer and Executive Vice President, Research & Development at Alkermes. "Across narcolepsy type 1 and narcolepsy type 2, significant unmet need remains, and we look forward to further characterizing the efficacy and safety profile of ALKS 2680 in the Vibrance studies in both of these important patient populations." Vibrance-2 is a phase 2, randomized, double-blind, dose-range-finding, placebo-controlled study evaluating the safety and efficacy of ALKS 2680 in adults with NT2.

Participants will be randomized to receive one of three doses of ALKS 2680 (10 mg, 14 mg or 18 mg) or placebo to be taken once-daily for eight weeks. The primary endpoint will.