Study to Assess Effectiveness of Oral Atogepant in Adult Participants For Prevention of Migraine in the United Kingdom

Inclusion Criteria: * Physician-confirmed diagnosis of migraine, classified as either episodic or chronic. * Have at least 1-year history of migraine with or without aura consistent with a diagnosis according to the International Classification of Headache Disorders 3rd edition (ICHD-3), 2018. * Without prior exposure to atogepant who are being prescribed atogepant in primary care for the prophylaxis of migraine with at least 4 migraine days per month. * Decision to initiate atogepant was made by a prescribing general practitioner (GP) or appropriate primary care health care professional (HCP) within a primary care setting, prior to and independent of any decision to approach the patient regarding participation in the study. * Willing and able to comply with the requirements of the study, including being able to read and comprehend written English at a level sufficient to understand and complete study patient-reported outcomes (PROs). * Not on concomitant preventive medication for migraine or have been on a stable preventive medication for migraine for at least 3 months prior to enrolment. * Access to a suitable device (e.g., laptop, tablet, or smartphone) to complete PRO measures. Exclusion Criteria: * Previously exposed to atogepant as routine therapy before the study period or from clinical trials experience prior to entry. * Enrolled in any interventional studies that may include investigational compounds for migraine. * Initiated on atogepant in secondary care and subsequently maintained in primary care. * Initiated on atogepant in primary care following specialist input via an 'advice and guidance' pathway. * Contraindications to atogepant administration as per local labelling. * Pregnant or planning to be pregnant or women of childbearing potential not using contraception. * In the opinion of the prescribing GP or appropriate primary care HCP, the patient has a history or current evidence of any condition that might interfere with the patient's ability to comply with the study requirements.