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Fosphenytoin is a form of phenytoin
that is given in a vein (intravenous, or IV) or into a muscle
(intramuscular, or IM) and can be used in cases of
Phenytoin prevents seizures by reducing
activity in certain areas of the brain.
Phenytoin can be used for:
Phenytoin should not be used to treat absence seizures or
Phenytoin helps to control partial seizures and generalized tonic-clonic seizures.1
Common side effects of phenytoin
High levels of phenytoin in the body may also cause:
In rare cases, phenytoin may cause a serious skin rash. Contact your doctor if you develop a rash while taking
Using phenytoin for a long time can increase your risk for osteoporosis and broken bones.
FDA Advisory. The U.S. Food and Drug Administration (FDA) has
issued an advisory on antiepileptic drugs (AEDs) and the risk of suicide. Talk
to your doctor about these possible side effects and the warning signs of suicide in adults and in children and teens.
See Drug Reference for a full list of side effects.
(Drug Reference is not available in all systems.)
It may take time and careful, controlled adjustments
by you and your doctor to find the combination, schedule, and dosing of
medicine to best manage your epilepsy. The goal is to prevent seizures while
causing as few side effects as possible. After you and your doctor
figure out the medicine program that works best for you, make sure to follow your program exactly as prescribed.
Complete the new medication information form (PDF)(What is a PDF document?) to help you understand this medication.
Drugs for epilepsy (2008). Treatment Guidelines From The Medical Letter, 6(70): 37–46.
August 28, 2013
John Pope, MD - Pediatrics
& Steven C. Schachter, MD - Neurology
How this information was developed to help you make better health decisions.
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