Wow, I was looking to see if Topamax and sun had any reactions and I found this site. I have noticed my hair getting thin, but never would have thought it was because of the medication. Am I enlightened. Thank you. I have been on various dosages of topamax for my migranes, which I must say helped from the start. The dosaged has been less as stressers in my life lessoned and more as headached appeared and migraned were to, so the dosaged went up. The tingles in my feet and hand have been there when the dosage changed, weight changed didn't happen, food tasted didn't happen. But now I am getting a tingle in my left lower head, I will ask my Dr. about. Oh, and the ringing in the head seems constant. AHeadinMontana