Phenytoin is used to prevent and control seizures (also called an anticonvulsant or antiepileptic drug). It works by reducing the spread of seizure activity in the brain. Learn about side effects, dosages, drug interactions, and more. Phenytoin is used to control certain type of seizures, and to treat and prevent seizures that may begin during or after surgery to the brain or nervous system. Phenytoin is in a class of medications called anticonvulsants. Phenytoin is used to control seizures (convulsions), including tonic-clonic (grand mal) and psychomotor (temporal lobe) seizures, in the treatment of epilepsy. It is also used to prevent and treat seizures that occur during brain surgery. Phenytoin is an anti-epileptic drug, also called an anticonvulsant. Phenytoin works by slowing down impulses in the brain that cause seizures. Phenytoin is used to control seizures. It does not treat all types of seizures, and your doctor will determine if it is the right medicine for you. Phenytoin, originally sold as the patent drug Dilantin and now available under other brand names, [1] is an anti-seizure medication. [3] It is useful for the prevention of tonic–clonic seizures (also known as grand mal seizures) and focal seizures, but not absence seizures. [3] Phenytoin is used to treat certain types of seizures. Common side effects include drowsiness, confusion, slurred speech, trouble with balance or coordination, and uncontrollable eye movements. Dilantin (phenytoin) is an anti-epileptic drug used to control seizures. Includes Dilantin side effects, interactions and indications. Phenytoin is an anticonvulsant drug used in the prophylaxis and control of various types of seizures. Phenytoin is classified as a hydantoin derivative and despite its narrow therapeutic index, it is one of the most commonly used anticonvulsants. Extended release available for ages 7 at same dosages. Lactation: Likely safe; limited information. Use caution. See phenytoin toxicity for overdose. ^Provides a rough guide only; neither sensitive nor specific. The following table is automatically generated from disease/condition pages across WikEM. View phenytoin information, including dose, uses, side-effects, pregnancy, breast feeding, contra-indications, monitoring requirements and important safety information.