At Visit 1, following informed consent, a medical, migraine, and medication history will be collected and a physical and neurological exam with vital signs will be performed. A 12-lead ECG will be completed. Eligible subjects will complete a 1-month Baseline Period and treat migraine with their current preferred treatment of choice. Throughout the study, subjects will complete daily Headache Diaries reporting headache severity and associated symptoms with use of study medication in each 30-day period.