First time i took it for almost a year I was only on 50mg a night (started at 25mg) and I didn't gain weight. Think I even managed to lose some.

I started again in December at 25mg and after many dose increases and decreases ended up on 50mg 3x a day. Made me hungry all the time.. I put on weight, not sure how much but I stopped it a couple of months ago for that reason.

I think maybe just taking it at night helped not to gain weight as i was asleep when I was hungriest.