Sumatriptan injection is used to treat the symptoms of migraine headaches (severe, throbbing headaches that sometimes are accompanied by nausea and sensitivity to sound and light). Sumatriptan injection is also used to treat the symptoms of cluster headaches (severe headaches usually on one side of the head or around one eye). Sumatriptan is in a class of medications called selective serotonin receptor agonists. It works by narrowing blood vessels in the brain, stopping pain signals from being sent to the brain, and blocking the release of certain natural substances that cause pain, nausea, and other symptoms of migraine or cluster headaches. Sumatriptan does not prevent migraine attacks or reduce the number of headaches you have.
Sumatriptan injection comes as a solution (liquid) to inject subcutaneously (just under your skin). It is usually used at the first sign of a migraine headache. If your symptoms improve after you use sumatriptan but return after 1 hour or longer, you may use a second dose of sumatriptan. However, if your symptoms do not improve after you use sumatriptan, do not use a second injection without talking to your doctor. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use sumatriptan exactly as directed. Do not use more or less of it or take it more often than prescribed by your doctor.
Sumatriptan injection comes in a pre-filled auto-injection device and in vials to be used with disposable syringes. If you are using vials of sumatriptan injection, your doctor or pharmacist will tell you what type of syringe you should use. Do not use any other type of syringe because you may not get the right amount of medication.
You can inject your sumatriptan in the outer side of your thigh or upper arm. Do not inject sumatriptan through clothing. Never inject sumatriptan into a vein or muscle.
You may use your first dose of sumatriptan injection in a doctor's office or other medical facility where you can be monitored for serious reactions. Carefully read the instructions that come with your device, and ask your doctor or pharmacist to show you how to use it.
Call your doctor if your headaches do not get better or occur more frequently after using sumatriptan injection.
If you use sumatriptan more often or for longer than the recommended period of time, your headaches may get worse or may occur more frequently. You should not use sumatriptan injection or take any other headache medication for more than 10 days per month. Call your doctor if you need to use sumatriptan injection to treat more than four headaches in 1-month period.
Do not use prefilled injection devices or vials of sumatriptan injection more than once. Dispose of used syringes in a puncture-resistant container. Ask your doctor or pharmacist how to dispose of the puncture-resistant container.
Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.
This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
Unless your doctor tells you otherwise, continue your normal diet.
pain or redness at the site of injection
feeling of warmth
pain, tightness, pressure, or heaviness in chest, throat, neck, or jaw
slow or difficult speech
breaking out in a cold sweat
weakness or numbness of an arm or leg
fast, pounding, or irregular heartbeat
sudden or severe stomach pain
sudden weight loss
paleness or blue color of the fingers and toes
shortness of breath
difficulty breathing or swallowing
swellingof the eyes, face, lips, tongue, or throat
pain, burning, or tingling in the hands or feet
changes in vision
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/Safety/MedWatch] or by phone [1-800-332-1088].
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature, away from light, excess heat, and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of needles, syringes, and the medication.
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
Keep all appointments with your doctor. Your blood pressure should be checked regularly.
You should keep a headache diary by writing down when you have headaches and when you use sumatriptan injection.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.
Last Revised - 07/15/2014
AHFS® Consumer Medication Information. © Copyright, 2014. The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.