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Alkermes’ Alixorexton Demonstrated Sustained Improvement in Wakefulness in Adults With Narcolepsy Type 1 and Type 2 in Long-Term Extension Study Interim Analysis

$ALKSPress releaseJul 13, 2026, 7:00 AM ETRead the release

Alkermes reported positive interim results from a long-term extension study of Alixorexton, showing sustained improvements in wakefulness and sleepiness for adults with narcolepsy type 1 and type 2 over approximately nine months. Patient-reported outcomes for cognition and fatigue also showed sustained improvement, while the drug was generally well-tolerated with no serious adverse events reported.

Key figures

Drug Name
Alixorexton
Phase Of Trial
Phase 2 long-term extension
Nt1 lte participants
78
Nt1 mean ess week 24
7.5
Nt2 lte participants
63
Nt2 mean ess week 24
8.9
Nt1 mean mwt week 24 minutes
29
Nt2 mean mwt week 24 minutes
18

AI analysis

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