hello patty, i also suffer with severe chronic migraines..how long have u been on the topamax? have u noticed any side effects? i only caution u because i was on topamax as well and when my dr increased me to 200 twice a day i had severe cognitive side effects.i was habing memory loss,repeating myself and not realizing it,and not functing as myself..i have not heard of it going higher than the two hundred,my dr told me that was the max.i reccomend talking to your dr and discussing your concerns.you are in control,always remember that.and if you are still concerbed you have every right to get a second opinion.dont hesitate.if you are concerned,ask questions..