The 2024 Canadian Headache Society (CHS) Migraine Prevention Guideline, which replaces the previous version published in 2012, granted strong recommendations for atogepant in episodic and chronic migraine, and for onabotulinumtoxinA in chronic migraine. 1 The new CHS Migraine Prevention Guideline is based on a comprehensive systematic review and meta-analysis and addresses both episodic and chronic migraine. 1 A strong... Read More