I've been on Abilify for a little over a month (20mg) and I have noticed a little weight gain, cause I've been grazing a lot due to nagging hunger, but hears thd weird part for me, I can't eat too much in one sitting like.a.regular.meal, or I'll start to feel sick to my stomach, happened to me during dinner tonight, it was just a burger, onion rings and part of a.banana split, I'm actually still full. Idk.weird.side effect. But idk when the hunger side effects kicked in I think it was a.couple.of days after I switched to 20mg.