I was put on Topamax for migraines about 4 1/2 yrs ago. I only took it for about 2 weeks. I was already under weight when I started taking it. I had horrible side affects. I could not even drink water without getting sick to my stomach. Every thing I ate soon left my body. I lost about 20 lbs in that 2 weeks. I had extreme fatigue. My mind seemed to be gone. I felt like I was crazy. My drive to work was about 25 minutes. I would get to work and forget how I even got there. I could not carry on conversations with people. My best friend got so worried that she stayed on me until I went back to the doctor to tell her my issues. She immediately took me off Topamax and switched me to Depakote. Depakote worked great but I gained so much weight that I had to buy an entire new wardrobe. So, I stopped taking it on my own and decided to just deal with the migraines. As much weight I have put on, I wouldn't mind getting back on Topamax and using it as a diet pill.