It's doubtful he's going to prescribe mirapex for bipolar disorder. I also wouldn't recommend topamax, and I don't know what metiformin is, so he probably won't prescribe that ether unless it's for something else. I'd suggest latuda, lamotrigine, wellbutrin to name a few. Ritalin would help reverse some of the weight gain, wellbutrin also has a tendency to reduce weight because it's actually an substituted amphetamine, it's a β-ketoamphetamine.