Typical uses of phenytoin medication & Side Effects Phenytoin is a widely recognized medication primarily used to manage certain neurological disorders. Its main function is to stabilize neuronal membranes and prevent seizure activity. The compound has been in use since the 1930s and continues to be a critical component in the therapeutic arsenal against epilepsy and other conditions. This article aims to explore the various applications of phenytoin, providing a comprehensive look at its ... Phenytoin is a prescription medicine used to treat certain types of seizures and prevent seizures during or after neurosurgery. Learn about its dosage forms, common and serious side effects, warnings, interactions, and how to store it. Phenytoin is an anticonvulsant medication used to treat epilepsy/seizures, and prevent seizures during/after brain surgery or after traumatic brain injury. Besides this, Phenytoin may also be used to treat trigeminal neuralgia (facial nerve pain). Learn about Phenytoin (Dilantin), its uses for seizures and epilepsy, proper dosage, side effects, drug interactions, and safe administration guidelines.