I used to be on Abilify, and I did not experience any changes in appetite. It was sort of "neutral." Lamictal also reduced my appetite....but luckily, this improved with time. I think it took 6 months before I had a normal appetite. I still do weigh less though than I've been in a long time, and I was never near overweight to begin with....so I was concerned at first, but I'm still in the healthy range. Plus, I think previous meds were making me overeat before the Lamictal, hence, the weight change. How long have you been on Lamictal? You might notice better tolerance with time, if you haven't been on it long.