g40 depakine keppra

Hello, I have seizures from about 18 years old, im now 31. After second one I started to take Depakine Chrono 500 mg twice a day. Had about 1-2 seizures per year, sometimes even less. Summer 2011 started to disable Depakine and started to take Keppra 500 mg twice a day ... seemed ok, but...