Please describe the medication: imitrex (sumatriptan)?

4 migraine: 4 migraine rx. 50 mg doses, tabletn nasel spray, injection (single ues auto injectors), there may b a xdermal patch also. Rx med. Oral is least effective due @ GI breakdown many side effects tho minor, some r fatal & involve the heart coronary vasospasm, tho main effect is intracranial & basilar arteries. Main receptors r located in these, and the rx causes constriction of these arteries=releaf.

Imitrex (sumatriptan): Imitrex (sumatriptan) is a headache medicine that narrows blood vessels around the brain. Imitrex also reduces substances in the body that can trigger headache pain, nausea, sensitivity to light and sound, and other migraine symptoms. It is used to treat migraine headaches. Imitrex will only treat a headache that has already begun. It will not prevent headaches or reduce the number of attacks.