Topiramate
"Been on several different meds for my epilepsy. Take it in conjunction with Tegretol and Keppra. Works great initially but loses its potency after awhile. Dosage has to constantly be increased. Side effects experienced include: Increased urination, trouble searching for words / memory problems, and depression. Although, I think, the depression is linked to other influences it might aggravate the symptom. (50 yr old male, mid America)"