) is a prescription medication used to treat certain types of seizures
in people with epilepsy
. There are several different phenytoin products: Dilantin Kapseals®
extended-release capsules), Dilantin Infatabs®
(phenytoin chewable tablets) and Dilantin-125®
(phenytoin oral suspension, or liquid). Specifically, phenytoin is approved to control the following types of seizures
- Complex partial seizures -- complex partial seizures involve decreased consciousness ("complex") and affect only one part of the brain ("partial")
- Generalized tonic-clonic seizures -- these seizures, which are also known as "grand mal" seizures, affect the whole brain ("generalized"), and involve muscle rigidity and contractions ("tonic-clonic")
- Seizures during brain surgery.
It is made by Pfizer.
Epilepsy is a brain disorder that occurs when there are recurring, brief changes in how the brain's electrical system works. These changes in brain activity can lead to a seizure (see Epilepsy Symptoms)
Phenytoin works by affecting sodium channels in the brain. It does not prevent abnormal brain activity from starting; instead, it prevents the abnormal activity from spreading to other parts of the brain. This action helps control seizures.