I take 75mg topamax (topiramate) 2/day for bipolar. yesterday i had 4 glasses of wine and had a simple partial seizure while drunk, with motor/visual disturbances. does this mean i'm prone to seizures?

See your doctor: Not sure why you are so confident that it was a "simple partial seizure." four glasses of wine is too many on one occasion, especially for a woman, and especially for someone being treated for bipolar disorder. You need a full neurological evaluation, especially an eeg and probably a ct scan, as well as several different blood tests. If you didn't see a doctor after this event, you should asap.

Possible alcohol : This means you may be an alcoholic and suffered a seizure related to alcohol withdrawal. Consider getting help is you drink daily or most days.