A Study to Learn About the Safety of Taking an Additional Dose of the Medicine Rimegepant in Adults With Migraine

Inclusion: * Eligible participants include adult participants aged 18 years of age or older with a minimum 1-year history of migraine (with or without aura) consistent with International Classification of Headache Disorders, 3rd Edition * Eligible participants must be currently using acute migraine treatment in accordance with the local label and have all of the following on average across the 12 weeks prior to the Screening Visit and, during the first 28 days of the observation phase (OP): (1) 6-14 monthly migraine days (MMDs); (2) \<15 monthly headache days (MHDs) (migraine or non-migraine); and (3) \<7 monthly non-migraine headache days. Exclusion: * Participants with headaches occurring ≥15 days per month (migraine or non-migraine) on average across the 12 weeks prior to the Screening Visit and ≥7 non-migraine headache days per month on average across the 12 weeks prior to the Screening Visit would not be eligible.