Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Most side effects of sumatriptan are milder and occur less often with the tablets than with the injection. Although not all of these side effects may occur, if they do occur they may need medical attention.

Stop using this medicine and check with your doctor immediately if any of the following side effects occur :

Rare

Chest pain (severe); changes in skin color on face; convulsions (seizures); fast or irregular breathing; puffiness or swelling of eyelids, area around the eyes, face, or lips; shortness of breath, troubled breathing, or wheezing

Check with your doctor right away if any of the following side effects continue for more than 1 hour . Even if they go away in less than 1 hour, check with your doctor before using any more sumatriptan if any of the following side effects occur :

Less common

Chest pain (mild); heaviness, tightness, or pressure in chest and/or neck

Also check with your doctor as soon as possible if any of the following side effects occur:

Less common

Difficulty in swallowing; pounding heartbeat; skin rash, hives, itching, or bumps on skin

Other side effects may occur that usually do not need medical attention. Some of the following effects, such as nausea, vomiting, drowsiness, dizziness, and general feeling of illness or tiredness, often occur during or after a migraine, even when sumatriptan has not been used. Most of the side effects caused by sumatriptan go away within a short time (less than 1 hour after an injection or 2 hours after a tablet). However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Burning, discharge, pain, and/or soreness in the nose; burning, pain, or redness at place of injection; change in sense of taste; discomfort in jaw, mouth, tongue, throat, nose, or sinuses; dizziness; drowsiness; feeling of burning, warmth, heat, numbness, tightness, or tingling; feeling cold, “strange,” or weak; flushing; lightheadedness; muscle aches, cramps, or stiffness; nausea or vomiting

Less common or rare

Anxiety; general feeling of illness or tiredness; vision changes

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.