This is a randomized, double-blind, placebo-controlled, crossover, two-attack, out-patient, early-intervention evaluation of subjects who have migraine with or without aura and who discontinued use of short acting triptan(s) within the past year due to non-response or intolerance. Subjects will treat 2 separate migraine attacks during the mild phase of each attack; one attack will be treated with one tablet of the Combination Product (sumatriptan succinate and naproxen sodium) and the other attack with one tablet of placebo (crossover design). [Study 2 of 2]