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Contents
Common use
Imitrex (sumatriptan) is a medication used to treat migraine attacks and cluster headaches once they begin. It is not intended for preventing migraines or reducing the number of episodes.
It works by narrowing blood vessels around the brain and reducing substances that can trigger headache symptoms such as pain, nausea, and sensitivity to light and sound.
Dosage and direction
Imitrex is available in tablets, nasal spray, and injections. Dosage depends on the form and severity of your condition:
Tablets: usually 25 mg to 100 mg at onset of migraine
Injections: 6 mg subcutaneously
Nasal spray: 5 to 20 mg per nostril
If the migraine comes back, a second dose may be taken after at least 2 hours (or 1 hour for injections), but do not exceed 200 mg in 24 hours.
Take it as soon as migraine symptoms appear, not before. Swallow tablets whole with water. Use nasal spray or injection exactly as instructed.
Precautions
Tell your doctor before using Imitrex if you have:
Heart disease or a history of heart attack
High blood preasure
Liver or kidney problems
Epilepsy or seizures
Sumatriptan may cause serious cardiovascular side effects. Avoid use if you are at high risk unless approved by a specialist.
Do not drive right after taking Imitrex, as it may cause drowsiness or dizzyness.
Contraindications
Do not use Imitrex if you:
Have uncontrolled hypertension
Have coronary artery disease or history of stroke
Are using MAO inhibitors or ergotamine-based drugs
Are allergic to sumatriptan or its ingredients
It is not approved for use in children under 18 without specific medical advice.
Possible side effects
Common side effects may include:
Tingling or numbness
Warm or cold sensations
Drowsiness, dizziness
Pressure or tight feeling in chest or neck
Rare but serious side effects:
Fast or irregular heartbeat
Seizures
Serotonin syndrome (confusion, fever, agitation)
Stroke or heart attack symptoms
Contact your doctor if you notice any unusual or worsening symptons.
Drug interactions
Do not take Imitrex with:
MAO inhibitors (e.g. isocarboxazid)
SSRIs or SNRIs (e.g. fluoxetine, sertraline)
Ergot-based medications
Other triptans (e.g. zolmitriptan, rizatriptan)
These combinations can increase risk of serotonin syndrome or serious cardiovascular effects.
Missed dose
Imitrex is taken as needed for migraine. If one dose is missed because symptoms passed, wait for the next episode. Do not take the medicine on a regular schedule.
Overdose
Symptoms of overdose may include tremors, red or blue toes/fingers, vomiting, drowsiness, slow or difficulty breathing.
Seek emerjency help if overdose is suspected.
Storage
Store Imitrex at 68F-77F (20C-25C) in a dry place. Protect from moisture and direct sunlight.
Keep out of reach of children and pets. Do not use expired medication.
U.S. Sale and Prescription Policy
Imitrex is an FDA-approved prescription medication in the United States for treating acute migraine and cluster headaches.
A valid prescription from a licensed healthcare provider is required. It should only be used after proper diagnosis, as migraine symptoms can mimic other serious health issues.
Unauthorized sale or importation of Imitrex is prohibited. U.S. pharmacies and mail-order services must comply with federal regulations.
Disclaimer
This information is for educational purposes only. It does not substitute medical advice from your healthcare provider. Always follow the instructions from your doctor or pharmacist. We are not responsible for issues caused by self-treatment or misusage.