Sumatriptan is a headache medicine that narrows blood vessels around the brain. Sumatriptan also reduces substances in the body that can trigger headache pain, nausea, sensitivity to light and sound, and other migraine symptoms.

Sumatriptan is used to treat migraine headaches and cluster headaches in adults. Sumatriptan will only treat a headache that has already begun. It will not prevent headaches or reduce the number of attacks.

Sumatriptan should not be used to treat a common tension headache or a headache that causes loss of movement on one side of your body. Use this medicine only if your condition has been confirmed by a doctor as migraine headaches.

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  • Alsuma, Imitrex, Imitrex Statdose, Imitrex Statdose Refill, SUMAtriptan Succinate Syringe, Sumavel DosePro, Zembrace SymTouch
  • Severity: Major
    You should check with your doctor immediately if any of these side effects occur when taking sumatriptan:

    Less common:
    Abdominal or stomach pain
    blurred vision
    changes in patterns and rhythms of speech
    chest pain or tightness
    fast, slow, irregular, pounding, or racing heartbeat or pulse
    muscle cramps and stiffness
    neck, throat, or jaw pain
    swelling of the fingers, hands, feet, or lower legs
    tightness in the chest
    trouble breathing
    chest pain or discomfort
    chest tightness or heaviness
    flushing or redness of the skin, especially on the face and neck
    increased blinking or spasms of the eyelid
    itching, pain, redness, or swelling
    lightheadedness, dizziness, or fainting
    nerve pain
    severe numbness, especially on one side of the face or body
    severe or continuing stomach pain
    trouble speaking or swallowing
    unusual bleeding or bruising
    vomiting of blood or material that looks like coffee grounds
    weakness of the arms and legs
    Incidence not known:
    back, leg, or stomach pains
    bleeding gums
    changes in vision
    muscle twitching
    pinpoint red spots on the skin
    poor coordination
    puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
    skin rash, hives, or itching
    unexplained bleeding or bruising
    unusually warm skin
    weakness in the arm or leg on one side of the body, sudden and severe
    Severity: Minor
    Some of the side effects that can occur with sumatriptan may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

    Less common:
    Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
    change in color vision
    change in hearing
    difficulty with concentrating
    increased sensitivity of the eyes to sunlight
    joint pain
    muscle aching or cramping
    muscle stiffness or tightness
    swollen joints
    trouble sleeping
    change in taste
    feeling halos around lights
    increased sensitivity to pain
    loss of appetite
    numbness, pain, tingling, or weakness
    stomach discomfort or upset
    tingling in the hands and feet
    tunnel vision
  • (sumatriptan) injection, solution