Sumatriptan is an antimigraine medicine. Migraine headaches are believed to result from dilatation of the blood vessels in the head. Sumatriptan causes constriction of the blood vessels, thus relieving migraine headache. While it is very effective in relieving migraine, it does not prevent or reduce the number of attacks of migraine.
Sumatriptan is used to relieve migraine and its associated nausea and light sensitivity. It does not prevent or reduce the number of attacks of migraine. It should not be used to treat other types of headaches. Sumatriptan is used to relieve migraine headache symptoms. However, it will not prevent migraine headaches or reduce the number of attacks you have. Many people find that their headaches go away completely after they take sumatriptan. Other people find that their headaches are much less painful, and that they are able to go back to their normal activities even though their headaches are not completely gone. Sumatriptan often relieves other symptoms that occur together with a migraine headache, such as nausea, vomiting, sensitivity to light, and sensitivity to sound.