I was on it for a bit when I was 13. Just a few months though. I don't remember how much I gained. Maybe 20 or 30. A few years ago when I was on a diffrent insurance they called and asked if I'd be willing to switch from Geodon (which saved my life and I was able to lose a lot of weight on) to Seroquel because it was less expensive. And I basically told them to shove the seroquel up their ***.