seizures
"I had two seizures prior to removal of a benign right frontal lobe brain tumor.  I was initially placed on Keppra 1000 mg 2x/day.  After a year, I went down to 750 mg and the following year 500 mg.  My neurologist will keep me at 500 mg until I am 4 1/2 years from my surgery when he will take me to 250 mg for the final 6 months.  At that point, he says I am just as likely to have a seizure as someone who has never had a seizure.  I have no side effects from Keppra, but am looking forward to my 5 year mark when I will no longer have to take medication."