I just changed from Abilify to Haldol and I'm doing very well on it. I am experiencing chronic constipation as a side effect, but nothing else, and I don't need to take a second drug. I am on 5 mg. which is a lower dose. Haldol's a potent drug though.

I definitely encourage you to discuss it with your pdoc. I'm not bipolar, but I can definitely sympathize with your Zyprexa weight gain. I had it back in the 90s when I took it, and I just finished a year and a half on Geodon then Abilify. Gained 89 pounds before I said "enough."

There are options. Your pdoc should be able to help you. Just don't change doses on your own. I cut my 20 mg Abilify tablets in half and it took me only four days to go fully psychotic again. Your pdoc will manage the change over properly to whatever drug you both decide to try. Good luck.