I am on now 400mg of Topamax a day. I take it for epilepsy. I have some halluciations but I ignore them. I lost over 30 lbs. The weight loss was needed because of a seond medication I am still currently on that made me gain weight. The Topamax gives my legs and neck the worst pain and mucsle achs... I get blurred vision. I will be trying to talk and my speech will start to slur or I forget words that I will need help remembering that are right on the tip of my tongue. My short term memory, that is not so good, I forget things most of the time. The medicine is for migrane relief but since I have been on it I have had the worst headaches ever! Along with the rest of you I do have gas problems also......The only reason I do not get off this stuff is that I have tried over 10 different medicines that didn't control my seizures, this does. I have had all the tests, Just went in for an MRI, what else can we do?