A migraine headache can cause intense throbbing or a pulsing sensation in one area of the head and is commonly accompanied by nausea, vomiting, and extreme sensitivity to light and sound. Imitrex is used to treat the symptoms of migraine headaches, severe, throbbing headaches that sometimes are accompanied by nausea or sensitivity to sound and light. Imitrex is in a class of medications called selective serotonin receptor agonists. It works by narrowing blood vessels in the head, 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. Imitrex does not prevent migraine attacks or reduce the number of headaches you have. Imitrex is classified as a triptan drug, and its chemical structure is similar to serotonin. Migraine pain is thought to be caused by dilation of the cerebral arteries. Triptans activate receptors in the brain to counter this process, causing vasoconstriction, a narrowing of the blood vessels.
Imitrex comes as a tablet to take by mouth. It is usually taken at the first sign of a migraine headache.If your symptoms improve after you take Imitrex but return after 2 hours or longer, you may take a second tablet. However, if your symptoms do not improve after you take sumitriptan, do not take a second tablet without calling your doctor. Your doctor will tell you the maximum number of tablets you may take in a 24-hour period.Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Imitrex exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. You may take your first dose of Imitrex in a doctor's office or other medical facility where you can be monitored for serious reactions.
If you take Imitrex more often or for longer than the recommended period of time, your headaches may get worse or may occur more frequently. You should not take Imitrex or any other headache medication for more than 10 days per month. Call your doctor if you need to take Imitrex to treat more than four headaches in a 1-month period.
Tell your doctor and pharmacist if you are allergic to imitrex, any other medications, or any of the ingredients in imitrex tablets. Ask your pharmacist for a list of the ingredients. Tell your doctor if you have or have ever had heart disease; a heart attack; angina (chest pain); irregular heartbeats; stroke or 'mini-stroke'; or circulation problems such as varicose veins, blood clots in the legs, raynaud's disease (problems with blood flow to the fingers, toes, ears, and nose), or ischemic bowel disease (bloody diarrhea and stomach pain caused by decreased blood flow to the intestines). Your doctor may tell you not to take imitrex. Tell your doctor if you smoke or are overweight; if you have or have ever had high blood pressure, high cholesterol, diabetes, seizures, or liver or kidney disease; if you have gone through menopause; or if any family members have or have ever had heart disease or stroke. Tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you plan to be sexually active while you are using this medication, talk to your doctor about effective methods of birth control. If you become pregnant while taking imitrex, call your doctor. You should know that this medication may make you drowsy or dizzy. Do not drive a car or operate machinery until you know how this medication affects you.
Follow the directions for using this medicine provided by your doctor. Take it exactly as directed. The recommended dose of Imitrex Tablets is 25 mg, 50 mg, or 100 mg. Doses of 50 mg and 100 mg may provide a greater effect than the 25-mg dose, but doses of 100 mg may not provide a greater effect than the 50-mg dose. Higher doses may have a greater risk of adverse reactions.
If the migraine has not resolved by 2 hours after taking Imitrex Tablets, or returns after a transient improvement, a second dose may be administered at least 2 hours after the first dose. The maximum daily dose is 200 mg in a 24-hour period.
Use Imitrex as soon as you notice headache symptoms, or after an attack has already begun. Your doctor may want to give your first dose of this medicine in a hospital or clinic setting to see if you have any serious side effects. Take one Imitrex tablet whole with a full glass of water. Do not split the tablet. After taking a tablet: If your headache does not completely go away, or goes away and comes back, take a second tablet two hours after the first. Do not take more than 200 mg of Imitrex oral tablets in 24 hours. If your symptoms have not improved, contact your doctor before taking any more tablets.
Imitrex may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately or get emergency medical treatment:
Sumatriptan may cause other side effects. Call your doctor if you have any unusual problems while you are taking this medication. Risk cannot be ruled out during pregnancy.
Over-the-counter pain relievers have been demonstrated to be safe when used as directed. But keep the following precautions in mind: Know the active ingredients in each product. Be sure to read the entire label. Do not exceed the recommended dosage on the package. Carefully consider how you use pain relievers and all medications. It is easy to over-medicate yourself. Imitrex is used in the treatment of migraine; cluster headaches and belongs to the drug class antimigraine agents. Imitrexis not a controlled substance, and is not found to have addictive properties. However, sumatriptan is part of a class of drugs that works with receptors in the brain. While it won't get you high, it is nonetheless potent.