I have been on Topamax for 4 months now and the only real side effect I have is a very disturbing one. When I wake up during the night or early in the morning to pee (as most of us fibromites are prone to) I see trails from any beam of light. The alarm clock, night-lite, any stream of light causes intense trippy-like trails. I really thought it would go away as my body got used to the med, but it never ends. Wish I could just sleep through it, because I have no problems/side effects during the day. Anyone else?