side effects is driving me crazy!

I take so three meds depoke, tegretol and onfi. lots of people probaly never heard onfi. It a new drug.  onfi makes my sezuires very good, but I'm also tired. the doctor was going to put me on a fourth drug. I said I take to many already and too many meds are bad. I don't know  which med is doing what. this is driving me nuts going back and fourth to the doctor