Imitrex (Sumatriptan) Dosage and Side Effects
IMITREX a prescription medicine used to treat migraine headaches in adults.
Proper Use of this medication
Your doctor will prescribe the right dose for you.
After the first recommended dose, you may be advised to take a second dose two hours or more later, if your migraine has not resolved. The maximum daily dose of IMITREX tablets is 200 mg in a 24-hour time period.
An additional dose of the injection can also be given if the first dose does not work and two hours or more have passed.
In clinical trials, headache suffers who got single doses of 140 to 300 mg did not have adverse reactions. Volunteers who took up to 400 mg did not suffer adverse reactions. Even so, doctors advise not taking more than 200 mg of IMITREX in a 24-hour period and only using it as directed by your doctor.
If you think you have taken too much IMITREX, call your doctor right away or go to the closest emergency room.
Missed Dose of IMITREX
IMITREX is meant to be taken as soon as headache pain begins, and you must wait at least two hours before taking another dose.
It’s important not to use more IMITREX than directed by your doctor, and no more than 200 mg in 24 hours.
Common Side Effects of IMITREX
The most commonly reported side effects of IMITREX are:
- Tiredness, weakness, drowsiness
- Balance problems
If these do not go away or bother you, call your doctor.
Severe Side Effects of IMITREX
Some of the side effects of IMITREX are serious. Call your doctor right away if you experience any of the following:
- Changes in the sensation or color of fingers or toes (Raynaud’s syndrome)
- Bloody diarrhea, constipation, nausea, vomiting, severe stomach pain
- Cramping, pain, tingling in legs, hips, leg muscles, feet, toes
- Hives, swelling of tongue, throat, oral area
- Mental changes, hallucinations, high temperature
- Chest pain
- Stiffness in neck, jaw
Rare Side Effects of IMITREX
Very rarely, temporary vision loss and blindness have been reported after taking IMITREX.
Warnings and Precautions
If you are at risk for cardiovascular disease, your doctor should evaluate your cardiac functioning before deciding on IMITREX.
If you have uncontrolled high blood pressure, severe liver problems, have had a stroke or a transient ischemic attack (TIA is lack of blood flow to the brain), you should not take IMITREX.
If you have epilepsy or a lowered seizure threshold, IMITREX must be used with caution.
Pregnancy and IMITREX
The drug’s benefits to the mother may outweigh the potential risk to the developing baby.
IMITREX is present in human breast milk. You can avoid exposing your infant to IMITREX by avoiding breastfeeding for 12 hours after taking the medicine. Ask your doctor for additional advice about breastfeeding.
Interactions with this medication
IMITREX can interact with a variety of other drugs, including:
- Drugs containing ergot, such as Migranal (dihydroergotamine mesylate) and Cafergot (ergotamine and caffeine)
- Monoamine Oxidase-A inhibitors, such as Nardil (phenelzine), or Marplan (isocarboxazid)
- Other triptan drugs
- SSRI antidepressants, such as Celexa (citalopram), and Prozac (fluoxetine)
Be sure to tell your doctor about any prescription, non-prescription, over-the-counter (OTC), illegal and recreational drugs, herbal remedies, nutritional and dietary supplements, and all other drugs and treatments you’re taking.
IMITREX and Alcohol
Studies show that when alcohol was consumed 30 minutes before taking sumatriptan, it had no effect on how well the medicine worked.