Eli Lilly and Co. plans to buy Centessa Pharmaceuticals plc for $6.3 billion in up-front cash and another potential $1.5 billion through contingent value rights, gaining access to a pipeline of orexin receptor 2 agonists for sleep disorders. The Indianapolis-based pharma is re-entering a field that has multibillion-dollar potential and one that could emulate the success seen with its obesity program. Centessa, of Boston and London, has a lead candidate, cleminorexton (formerly ORX-750), with positive phase IIa data in narcolepsy types 1 and 2 and idiopathic hypersomnia.
Takeda Pharmaceutical Co. Ltd. has synthesized heterocyclic compounds acting as orexin OX2 receptor (OX2R; HCRTR2) agonists reported to be useful for the treatment of narcolepsy, among others.
The pricier offer by Lundbeck A/S for Avadel Pharmaceuticals plc – which follows last month’s agreement for a takeover by Alkermes plc – had Wall Street buzzing as pundits weighed the odds for each suitor.
Alkermes plc’s placebo-controlled phase II study of alixorexton in treating narcolepsy type 2 (NT2) hit its dual primary endpoints, producing statistically significant and clinically meaningful improvement in wakefulness and excessive daytime sleepiness. Alkermes said alixorexton is the first oral orexin 2 receptor agonist that has shown efficacy in a large phase II clinical trial in those with NT2.
Centessa Pharmaceuticals plc’s unremarkable third-quarter 2025 earnings report was greatly overshadowed by an early readout from its orexin receptor 2 (OX2R) agonist program in narcolepsy, particularly promising phase IIa data demonstrating ORX-750’s efficacy across a group of sleep disorders, though investors seek further data to differentiate Centessa’s program from potential competitors such as Takeda Pharmaceutical Co. Ltd.’s oveporexton and Alkermes plc’s alixorexton.
Having reached peace with Jazz Pharmaceuticals plc over litigation related to its U.S. FDA-approved drug, Lumryz (sodium oxybate), Avadel Pharmaceuticals plc agreed to a cash takeover by Alkermes plc valued at about $2.1 billion, a deal Alkermes CEO Richard Pops said “puts us in the sleep market immediately on closing,” which is expected in the first quarter of 2026. All three players are based in Dublin.
At the 2025 World Sleep Congress, researchers from Bioprojet SA, Harmony Biosciences Holdings Inc. and Teijin Pharma Ltd. presented preclinical efficacy data on BP1.15205, a novel, orally available OX2R agonist under development for the treatment of narcolepsy.
Takeda Pharmaceutical Co. Ltd.’s dual phase III victories in narcolepsy type 1 (NT1) with oral orexin receptor 2 (OX2R)-selective agonist oveporexton (also known as TAK-861) had Wall Street mulling what the outcome might mean for others trying the mechanism of action, and questions linger about side effects on eyesight.
Takeda Pharmaceutical Co. Ltd.’s dual phase III victories in narcolepsy type 1 (NT1) with oral orexin receptor 2 (OX2R)-selective agonist oveporexton (also known as TAK-861) had Wall Street mulling what the outcome might mean for others trying the mechanism of action, and questions linger about side effects on eyesight.
