Seizure meds effect everyone differently. I have had the best experiences with Keppra, yet I know a ton of people that have not. It has worked great for seizure control. It main side effects I have heard of are Keppra-rage. It can make you more aggressive, less patient, but vitamin B works great to counteract this side effects. I had a bad reaction to Lamictal and it increased my seizures greatly. According to my neuro, this is not a common side effect but can happen with any seizure med.
http://www.crazymeds.us/ Is a great web site that uses one man’s first hand experiences to explain medications. He has a great sense of humor about them.