Sumatriptan Succinate, commonly known as sumatriptan, is used to treat migraines. It helps relieve headache, pain, and other migraine symptoms, including nausea, vomiting, and sensitivity to light and sound. Prompt treatment with sumatriptan allows you to return to your normal routine and may decrease your need for other pain medications. Sumatriptan belongs to a class of drugs known as triptans. It affects a certain natural substance called serotonin, which causes narrowing of blood vessels in the brain.