Dilantin (Phenytoin): Uses, Side Effects & What It Treats

Dilantin, also known as phenytoin, is classified as an anticonvulsant or anti-epileptic medication, used to help control and/or prevent seizures. This medication is not approved by the U.S. Food and Drug Administration (FDA) as an antidepressant.

Treatment for Seizures

• Dilantin is prescribed to treat complex partial seizures, which affect consciousness and one part of the brain, and generalized tonic-clonic ('grand mal') seizures. It is also administered during brain surgery.

Side Effects

• Like all medications, Dilantin may cause side effects. The most commonly reported side effects include abnormal eye movements, slurred speech, lethargy, confusion and problems with muscle coordination.

Warning

• While using Dilantin, patients have an increased risk of suicidal ideation (suicidal thoughts). Patients require close monitoring and should report any changes in behavior to a physician.

Off-Label Uses

• Physicians often prescribe medications for uses other than those sanctioned by the FDA. Dilantin has been prescribed for nerve pain, migraines and irregular heart rhythms.

Facts

• Dilantin was the first anti-seizure medication. It was synthesized in 1908 and received initial FDA approval in 1939.