Brand Names: Imitrex, Imigran.
Generic Name: Sumatriptan.
This medication description is not meant for treatment prescription without the intervention of a specialist

Common Uses
Sumatriptan is prescribed for the treatment of a migraine attack with or without the presence of an aura (visual disturbances, usually sensations of halos or flickering lights, which precede an attack). The injectable form is also used to relieve cluster headache attacks. (Cluster headaches come on in waves, then disappear for long periods of time. They are limited to one side of the head, and occur mainly in men.)
Sumatriptan cuts headaches short. It will not reduce the number of attacks you experience.

How to Take
The usual adult dose is one 25, 50, or 100 milligram tablet taken with water or other liquid. The most you should take at one time is 100 milligrams, and the most you should take in 1 day is 200 milligrams. Doses should be spaced at least 2 hours apart.
If you have liver disease, you should not take more than 50 milligrams of Sumatriptan Tablets at one time.
The recommended adult dose (spray) ranges from 5 to 20 milligrams taken when the attack begins and repeated once, if necessary, 2 hours later. Doses are usually taken as a single spray in one nostril, but if a 10-milligram dose works best for you, you can take it as a 5-milligram spray in each nostril. Do not use more than 20 milligrams at a time, or take more than 40 milligrams a day.

Warning and Precautions
Sumatriptan may cause drowsiness or dizziness. These effects may be worse if you take it with alcohol or certain medicines. Use Sumatriptan with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
Overuse of Sumatriptan can cause your headache to become worse. Do not take more than the recommended dose or use more often than prescribed without checking with your doctor.
Rarely, serious heart problems (eg, heart attack, irregular heartbeat) have been reported within a few hours of using Sumatriptan. Contact your doctor at once if fast or irregular heartbeat; chest, jaw, or neck pain or numbness; numbness of an arm or leg; severe stomach pain, dizziness, or vomiting; fainting; or vision changes occur. Discuss any questions or concerns with your doctor.
Serotonin syndrome is a possibly fatal syndrome that can be caused by Sumatriptan. Your risk may be greater if you take Sumatriptan with certain other medicines (eg, SSRIs, SNRIs). Symptoms may include agitation; confusion; hallucinations; coma; fever; fast or irregular heartbeat; tremor; excessive sweating; and nausea, vomiting, or diarrhea. Contact your doctor at once if you have any of these symptoms.
Sumatriptan should not be used to prevent or reduce the number of migraine headaches you have. If you have a headache that is different than your usual migraine headaches, check with your doctor before using Sumatriptan.
Do not use more than the recommended dose without checking with your doctor.
Lab tests, including heart function tests, may be performed while you use Sumatriptan. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.

Missed Dose
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.

Overdose
Symptoms of overdose may include blue skin or lips; chest pain; dilated pupils; loss of coordination; paralysis; redness of the fingers or toes; seizures; slow or difficult breathing; tremor. Seek medical help if you think you take too much of Sumatriptan.

Storage
Store Sumatriptan between 36 and 86 degrees F (2 and 30 degrees C). Store away from heat, moisture, and light. Do not freeze. Do not store at temperatures above 86 degrees F (30 degrees C). Do not store in the bathroom. Keep Sumatriptan in the case provided. Throw away expired medicine as directed by your doctor (the expiration date is printed on the treatment pack). Do not throw away the autoinjector. Keep Sumatriptan out of the reach of children and away from pets.

Possible Side Effects
Common side effects are: burning, numbness, or tingling of the skin; dizziness; drowsiness; feeling of heaviness, pressure, or tightness; feeling strange; mild, temporary flushing; muscle aches; nausea; neck stiffness; pain, swelling, or redness at the injection site; sick feeling; throat or sinus discomfort; tight feeling in the head; tingling; tiredness; vomiting; warm/hot sensation; weakness.

More Information
The information given above is a summary. Your pharmacist can provide more information about Sumatriptan. Do not share this medicine with others for whom it was not prescribed. Do not use this medicine for other health conditions. If using this medicine for an extended period of time, obtain refills before your supply runs out.