I gained about 35lbs from meds, and it took me forever to lose the weight! I never lost it all (but that is actually a good thing since I was underweight from being anorexic and I am now at a healthy weight). In order to go back to my pre-med weight, I would have to engage in dangerous activities health wise.

However, I've been on multiple AP's, and the only one that made me gain weight was Zyprexa. I've been on that, Abilify, Geodon and Seroquel. I wasn't on Abilify long enough to know if I would gain weight on it or not (it was only about 2 weeks)...but I was on Geodon for probably about a year, and I've been on Seroquel for almost 2 years (was on it from July of 2012 to April of last year and then again from July of last year until now). Both were completely weight neutral for me.