I have been on Topamax for 6 years and the side effects that I have experienced have been dry eyes, dry mouth, muscle/joint aches, chest pain, memory problems, body odor, fluid retention, weight GAIN (not loss), head aches, mood swings, hallucinations, blurred vision especially at night, tingling/burning of the extremities, and the constant feeling of never being able to get warm. I was on 400mg twice a day, and since the hallucinations, I have been cut back to 100 mg twice a day. My headaches are worse, and I am now experiencing hair loss and hair breakage.