seizures
"All depends on the individual I actually found that Keppra made my seizures WORSE. I started taking Keppra and was fine for 2 years with no side affects, no seizures, nothing, then 1 day I had a massive grand Mal seizure the doctors keep upping my dose. Now I am on the maximum dose but still having seizures. Before I took Keppra I had only a few fits in my life now I have them about once every couple of weeks."