Topamax and other ones

I started topamax on Tuesday for bipolar disorder. My pdoc started me on 50 mg and I took one in the am and got really sleepy so I cut back to 25 mg at night and went back to 50 mg on the weekend. I was surprised to feel the effects the first day. I thought I had gotten a flat pepsi at lunch and then realized that my tastes had already been effected. I got the tingly hands and have noticed that my leg muscles have been twitching some. The very first day I felt like I was in a fog and I definitely don't want to feel dumb. I'm hoping that cutting back and titrating up more slowly, as well as taking the medicine at night will help. The side effects I can stand as I withstood 6 months on Accutane for acne which was waaayyy worse.