Some brands of phenytoin are interchangeable while others are not. Do not crush, chew, or break the capsules. Swallow them whole. They are specially formulated to release the drug slowly into your body. Carry or wear a medical identification tag to let others know that you are taking this medicine in the case of an emergency.
Phenytoin is an anti-epileptic.
It works by slowing down impulses in the brain that cause seizures. Phenytoin is used to control seizures. Phenytoin may also be used for purposes other than those listed in this medication guide. Before taking this medication, tell your doctor if you have, or ever have had, liver disease. You may not be able to take phenytoin, or you may require a lower dose or special monitoring during treatment.