Outcome for headache and pain-free nonresponders to treatment of the first attack: A pooled post-hoc analysis of four randomized trials of eletriptan 40 mg

Objective The objective of this article is to evaluate, in first attack eletriptan headache and pain-free nonresponders, the efficacy of treating a second and third attack with the same dose of eletriptan 40mg (ELE-40). Methods Data were pooled from four randomized, double-blind, placebo-controlled, multiple attack studies of eletriptan in the treatment of migraine. The first-attack eletriptan headache (HNR) and pain-free (PFNR) nonresponder samples consisted of patients who did not achieve headache or pain-free responses at two hours, or sustained headache or pain-free responses at 24 hours. The efficacy of the same dose of eletriptan (vs placebo; PBO) in treating the second and third attacks was evaluated using a logistic regression model. Results Among Attack 1 eletriptan HNRs, treatment with ELE-40 (vs PBO) was associated with significantly higher two-hour headache response and pain-free rates, respectively, on both Attack 2 (48.8% vs 20.2%; 17.0% vs 3.9%; p<0.0001 for both comparisons) and Attack 3 (37.4% vs 15.5%; 18.8% vs 3.2%; p<0.0001 for both comparisons). Significantly higher sustained headache response and pain-free rates at 24 hours were also observed on both Attack 2 and Attack 3. Conclusions The results of this pooled analysis suggest that patients who have HNR or PFNR to an initial dose of eletriptan may respond when a second and third attack is treated with the same dose.