Hi my husband has been dilantin since September last year. Since he's been taking it, a lot of things have happened to him. He hasn't been sleeping, has trouble swallowing, has lost a lot of weight, speaks with a slur, numbness in hands. You name it, he has it. I went on the internet to see if I could find the side effects for dilantin. Everything I have told you is what I found and many more. Please tell me what should we do. I am thinking of stopping him from taking it once and for all. Sorry but my name is Regina