I have not gained weight on Abilify. I gained a ton when I took Zyprexa years ago. My pdoc just told me last week that Abilify can also cause me to lose weight and /or appetite. Or that it's weight nuetral, something like that. We were discussing my meds and she mentioned how three of them that I take can actually cause some weight loss, and they were Prozac, Topamax and Abilify. I also take Lamictal. I think that Abilify is a good drug.