seizures
"I am 16, I have had Juvenille Myoclonic Epilepsy for almost 2 years now and have been on keppra ever since. I experienced some weight loss, extreme depression, hallucinations, and memory loss. I've only had one other grand mal seizure while on this and I do not jerk anymore. Though it works I wish I felt alive and awake during normal daily tasks. If you can seek other medications for physiological and behavioral reasons, I suggest it."