seizures
"I had every side effect  even pain in my temples which was so painful that I thought they were going to bust and was ready to go to the ER, when I decided to look my meds up online and found that Keppra was causing these side effects, and people were going to the ER for this.  Also, I was having so many memory problems I couldn't remember anything from 2 mins prior. I had Agitation, Anixiety, Angry Outbursts, I had to Go..I mean go.. I couldn't stay still sometimes I felt like I had to leave it was crazy.. I was loosing my mind.. I had no control I was very Angry lots of outbursts and I couldn't control it! When I looked up all of the side effects I couldn't believe how I felt was right there, it was me right there."