The Biotech Surged 50% On Positive Data In March. Now, It's Almost Gone.

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Xenon Pharmaceuticals (XENE) voluntarily halted enrollment in a handful of studies Friday due to several unexpected side effects. The biotech stock crashed to a six-month low. The drug at the center of the debacle is azetukalner, which Xenon is hoping will soon gain approval to treat epilepsy. Xenon stock shot 50% higher on March 9 following positive results for azetukalner…

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9/10/2026 Biohaven stock plummeted Thursday after the company paused enrollment in a midstage study of its seizure treatment due to safety...

9/10/2026 Biohaven stock plummeted Thursday after the company paused enrollment in...

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