Gained 50 pounds on Paxil, lost most when I went off but only because withdrawal drove me so crazy I couldn't eat. Now on Lexapro, gaining weight again. On the other hand, that's not why I went off Paxil, I didn't like the weight gain, but like bastel, it was a heck of a lot better than not being able to go anywhere.
Depends on the meds you are taking and as for the weight loss, many people lose it once they are off, I am still on them and tho I find it hard to lose weight, I would rather gain then go crazy.