Seizures
"After about 8 days of being on Dilantin, I had a horrible allergic reaction. I woke up at like 4:30 with unbearably itchy hives that literally covered my whole body....face, shoulders, chest, stomach, back, buttocks &amp; legs....even on the backs of my hands and feet, with a few spots on the palm of my hand. It sucked, needless to say. It also made me really tired all day, even though I&#039;d take it at night. I&#039;m now starting on KEPPRA. Hope it works."