Hi there. I'm in the same boat as you. Just about to come off 10mg of citalopram (having reduced over a few months) and start sertraline. I am also on 200mg of laminotrigine. I am interested in the weight gain theory of sertraline too. I'm currently 76kg. Ill see what happens in a few weeks. I'm certainly not wanting to gain. Let me know how you go.