Completely understand and can sympathize with the experience with Keppra. My experience with Keppra was absolutely miserable as well. Ironically that was the one drug the doctors kept saying had the least side effects and was the most widely used/accepted AED. Got prescribed Vimpat but didn't fill the prescription because I can't afford a drug that costs a mortgage payment per month (~$1200 and a mere ~$350 after insurance). Hence why I continue to be on Zonisamide, which work well, keeps seizures at bay, and has a minimum of side-effects. The worst I have to deal with is the fact it is a diuretic.