My grandson takes Abilify too, for Autism. Lexapro for his anxiety. He hasn't gained any weight. But he is only 6. You might want to research this a bit more and see if it reads on the adverse side effects. Those are usually more rare, but in some people the case holds true. Have her thyroid checked also. That may be the culprit. If not? then talk to the dr. and see what he thinks. I know the heavy duty psychitropic drugs add weight to you. Is she on anything else? If her metabalism is affected, or slowed down, then anything she eats will turn to fat. I don't know why, but you don't have energy to get up and move about.