I have ED and bipolar. It took years to convince me to start an antipsycotic. Abilify, invaga, and geodon are the most weight neutral. I had a "as need " anti psychotic. Then recently I tried to get on symbyax which has zyprexa, in it which is a major weight gainer but it also has prozac which should counteract.

Wellbutrin and topamax are weight loss.