What's the difference between acute and preventive medicines for migraines?

Acute headache treatments are used to treat infrequent migraine headaches -- which occur no more than two days per week -- and help reduce the pain and other symptoms occurring with a specific headache episode. Prevention headache treatments are used to treat frequent migraine headaches -- which occur regularly 3 or more days per week -- and help reduce future headache frequency and severity. Preventive medications are usually taken on a daily basis.

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