Dilantin (Phenytoin) is an anti-epileptic drug that is used to control seizures. It works by slowing down impulses in the brain that cause seizures. If you have any of the following signs of an allergic reaction, call your doctor immediately:

• Hives
• Difficulty breathing
• Swelling of your face, lips, tongue, or throat
• Fever, sore throat, and headache with a severe blistering, peeling, and red skin rash

It has also been linked to Stevens-Johnson Syndrome (SJS), a very serious and sometimes deadly skin disorder.

Stevens-Johnson Syndrome (SJS) is a painful, disabling, and potentially deadly skin disease that is usually caused by a reaction to certain drugs. Another form of the disease is called Toxic Epidermal Necrolysis (TEN), also often caused by a drug reaction. Allergic reaction to medication is the leading cause of SJS.