seizures
"I had my first grand mal at age 35.  I started taking 500mg of Keppra 1x a day and eventually worked down to 250mg 1x a day without any seizures.  My doctor and I decided to take me off the medicine as there has been no epilepsy detected in all the testing I have done.  After being off the medicine for 30 days I had another grand mal.  So, I started taking the minimal dosage of 1/2 of a 250mg pill once a day.  It has been over a year now and I have not had another seizure.  I do experience dizziness at the beginning of my day before I take my pill.  After a few hours I feel fine.  I also sometimes experience drowsiness, tiredness, agitation, anger, anxiety, depression, irritability and occasional panic attacks.   I'd rather have these than seizures!"