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Alkermes Announces Orphan Drug Designations for Alixorexton in the U.S. and Europe

$ALKSPress releaseJun 15, 2026, 7:00 AM ETRead the release

Alkermes announced that its investigational orexin 2 receptor agonist, alixorexton, has received orphan drug designations from both the FDA and the European Commission. The FDA granted designation for the treatment of idiopathic hypersomnia (IH), while the European Commission granted it for narcolepsy. These designations unlock significant development incentives, including tax credits, fee waivers, and potential market exclusivity periods of seven years in the U.S. and up to ten years in Europe.

Key figures

Drug Name
alixorexton
Phase Of Trial
Phase 3
Prevalence us ih
40,000

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