Antidepressants
Unfortunately there is no antidepressant that prevents weight gain. I can tell you I am 12 years out and have been on the same antidepressant for 12 years. I lost 129 lbs and was at a size 4/6 for 8 years then went to a size 2/4 for 3 years and just this past year I have gained 20 lbs and am a size 6/8. The point is, I have been on the same antidepressant this whole time. It is what I have been doing this past year that has made me gain weight...snacking all afternoon and night, sleeping more, no exercise etc. I do believe it is what you do and not what antidepressant you are on that keeps the weight off. The antidepressant I have been taking is celexa 40mg and 100mg of Wellbutrin (I take the generic for both of these).
I would love to hear your progress.