Imitrex (sumatriptan) is a headache medicine. Imitrex is a medicine which is used to cure migraines and extreme headaches. It contains Sumatriptan the active chemical in this drug. This drug treats migraine attacks when aura is either present or absent. Generic Imitrex is also useful in reducing certain substances in the body which cause pain associated with headache, nausea, sensitivity to sound and light and other such symptoms of migraine. Generic Imitrex is generic version of its branded counterpart which is usually prescribed by doctor for the cure of inflammation caused due to migraine head ache. Generic imitrex The generic form of this drug is as effective as its branded counterparts, as it contains the same constituents in similar proportion.