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Zolmitriptan provides consistent migraine relief when used in the long-term.

Migraine is a chronic disease that significantly reduces quality of life between, as well as during, attacks. Treatments that provide consistent relief may reduce the burden of the disease. In the open-label phase of a two-part study, patients could choose to treat initial, persistent or recurrent migraine headache of any intensity with 2.5 mg or 5 mg zolmitriptan. This novel study design allowed patients to manage and maximise their migraine relief. Headache response rates and pain-free response rates were assessed within two hours of dosing with zolmitriptan, and response rates were compared across migraines with and without a history of aura, and associated or not with menses. Consistency of response was also assessed in those patients treating at least 20 attacks. Of 49,784 attacks treated, 66% (32,737 attacks) were treated with a single dose of zolmitriptan. Two-hour headache response rates to an initial dose of 2.5 mg or 5 mg zolmitriptan were 85% (median 95%) and 79% (median 88%), respectively, across all attacks. Corresponding pain-free response rates were 69% and 59%. Responses were independent of gender and age and were similar in patients with and without aura and in attacks associated or not associated with menses. Consistent response rates were achieved within individual patients; during months 1 to 3, 64% of patients reported a headache response in > 75% of their migraine attacks. In patients treating at least 20 attacks, 2.5 mg and 5 mg zolmitriptan produced consistently high headache response rates (range 84-91% and 76-84%, respectively) and pain-free response rates (range 70-76% and 58-65%, respectively) across attacks. In the minority of attacks requiring a second dose of zolmitriptan for persistent or recurrent headache, response rates to a second dose were also consistent across attacks. In conclusion, zolmitriptan 2.5 mg and 5 mg show consistent effectiveness in the treatment of multiple migraine attacks in individual patients and are unaffected by gender, age and the presence of aura or the relationship to menses.