I've been taking Keppra for almost 5 months now, and I still have side effects. loss of balance, vertigo, and dizziness are the major ones. I have been to 4 Drs, but nobody wants to discuss these with me other than t put me on meds to control vertigo. In my research, I found that side effects usually only last around 4 weeks. I'm concerned that I'm either taking to high a dosage or totally on the wrong meds. has anybody else had these side effects last this long? I'm considering going to the U.S. to see if I can get better attention.