A 32-year-old nonsmoking female migraineur presents to your primary care office seeking more effective abortive treatment for her migraines. She is having one to two headaches per month that are only partially relieved by NSAIDs. Each headache lasts 2 to 3 days and negatively impacts her ability to work and to care for her two children. She is currently asymptomatic. Her medical history is negative for diabetes mellitus, hypertension, and dyslipidemia.