Q. A 33-year-old woman is brought to the clinic by her husband because of a 10-hour history of headache, nausea, and 2 episodes of vomiting. She reports increased craving for food for the past 2 days, and visual disturbances just before the headache started. The headache is over her right frontotemporal area, which she describes as a pulsating headache. Her vital signs are within normal limits. On clinical examination, there are normal sensations and normal deep tendon reflexes. Which one of the following is a standard abortive treatment for this condition?