Hi all I have been on and off APs since 2007. Abilify has been the worst one for me as for gaining weight. Was on and off that one the most. At that time I was diagnosed with Major Depressive Disorder. So from 2007 until 2010 I had gained well over 100 pounds from being on and off of it. The only way that I have lost weight was going on a mostly vegetarian diet for months. That first time I lost 20 pounds. Then in 2011 I was diagnosed with Bipolar I and put on Geodon. Not too much more weight gain from it... Luckily I was taken off of this last year. And from Feb 2013 til present I have lost 42 pounds so far. I had severely changed my diet again but mostly vegetarian meals. Limiting calorie drinks to a minimum throughout the day. Using Water and vitamin water as a substitute, also Hint Water (zero cal). I just joined a gym so hopefully I can lose even more weight now. I had to train myself to eat a lot less. Lucky for me (not really) Lithium makes me excessively thirsty all the time. There is almost no time throughout the day where there is not a drink next to me. Oh and before APs I had NO trouble with my weight....So its very very frustrating. I wish you all the best for your troubles with weight loss and to solve them!