Generic Imitrex treats migraine by functioning on the reduced count of serotonin which causes migraine headache. Sumatriptan is the chief active component of the drug which boosts the level of serotonin which in turn helps by reducing the inflammation caused by the disorder. The drug compresses the blood vessels in head around the brain and ceases the decrement of level of serotonin.
The drug effectively treats migraine pain which is caused by dilation of blood vessel present around the brain. Generic Imitrex is considered in the list of Triptans drug which can significantly augment the level or serotonin in the head. It also provides relief by obstructing the pain signal from contacting the brain. In case of cluster head ache, the drug works by undermining the functions of trigeminal nerve.