Sumatriptan - Generic Imigran - Generic Imitrex taken at the beginning of a migraine headache, may reduce the severity of the headache. It is not effective in preventing migraines. It can also stop the upset stomach, vomiting, and sensitivity to light and noise associated with migraine headaches.
Sumatriptan works by narrowing blood vessels in the head and stopping pain signals from being sent to the brain.


