- Met International Headache Society diagnostic criteria for migraine with or without
aura
- Expected to suffer one to six acute migraine attacks per month based on past history
- Experienced migraines for at least one year prior to entering study, and historically
have not responded to NSAIDs
- Frequent migraine or frequent concomitant non-migrainous headache (average of >6
attacks per month)
- Atypical migraines that consistently failed to respond to adequate medical therapy
- Migraine with prolonged aura, familial hemiplegic migraine, basilar migraine,
migrainous infarction, migraine aura without headache, or migraine with acute-onset
aura