Participant was Pregnant or a nursing mother

Participant had a history or current evidence of drug or alcohol abuse

Participant had a history or clinical evidence of cardiovascular disease

Participant had a clinically significant Electrocardiography (ECG) abnormality

Participant had a resting systolic blood pressure of greater than 145 mm Hg or diastolic of less than 95 mm Hg at screening

Participant had received treatment with an investigational device or compound within 30 days of the study

Participant typically suffered from less then 1 or more than 8 attacks of migraine per month

Participant had difficulty in distinguishing his/her migraine attacks from tension or interval headaches

Participant was currently taking monoamine oxidase inhibitors, methysergide or lithium

MK0462 5 mg, Sumatriptan 50 mg, and Placebo Comparison Study (0462-029)