Why Imitrex?

Sumatriptan is a headache medicine. It is believed to work by causing vasoconstriction (narrowing) of blood vessels (arteries and veins) around the brain. Sumatriptan also reduces the release of substances in the body that contribute to headache pain, nausea, sensitivity to light and sound, and other migraine symptoms.

How should you take Imitrex?

Take one tablet, administer an injection, or use the nasal spray as soon as you notice symptoms of a migraine, or at any time during an attack.

What side effects may occur?

If you experience any of the following serious side effects, stop using sumatriptan and seek emergency medical attention: * an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives); * severe or prolonged chest pain or an irregular heartbeat; * chest, jaw, or neck pain or tightness; * sudden or severe stomach pain; * problems seeing; or * unusual weakness or numbness.

Why should Imitrex?

Do not take this medication without first talking to your doctor if you have heart disease including angina (chest pain), history of a heart attack, or high blood pressure. Serious, even fatal, side effects involving the heart have been reported with sumatriptan and other similar medicines.