Xenon’s epilepsy drug posts strong Phase 3 data; XENE shares jump ahead of U.S. filing
Xenon Pharmaceuticals said its Phase 3 trial showed azetukalner cut monthly focal onset seizures by 53.2% at the 25 mg dose versus 10.4% for placebo. Shares rose over 40% in premarket trading. The company plans to file for U.S. FDA approval in the third quarter of 2026. Dizziness was the most common side effect, with higher discontinuations in the 25 mg group.