I hesitated to post since I hate to be negative, but I could not tolerate Topamax. I had terrible memory loss and evil mood swings, and irregular heartbeat. I was ok on 25 but when I went to 50 the side effects started. I hung in for 6 weeks to no avail (except it did help my headaches!!).
I have read alot of people here are helped on Topamax, so I would say, keep trying. If the side effects are too much then you can stop it. I had no problem stopping, the side effects stopped immediately.
I work at a stressful, detailed job (cpa during tax season) so maybe the memory loss was worse for me, i dont know your situation but maybe it will pass if you stick with it. Best of luck to you.