This study is designed to confirm the effectiveness and safety of atogepant in real life. The primary endpoint is the change from baseline in the mean number of monthly migraine days (MMDs)across the 12 weeks. Secondary endpoints include: change in monthly analgesic intake, Numeric Rating Scale (NRS), Headache Impact Test-6 (HIT-6) and Migraine disability assessment (MIDAS) scores, \>=50%, \>=75%, 100% responders, \>=50%, \>=75%, 100% responders in patients with medication overuse at weeks 9-12 compared to baseline and adverse events eventually occur during 12 weeks of treatment.
