Hi there,
I take Wellbutrin for depression as well. I take the purple tab - one a day (150mg?). When i first started taking it a few years ago, i lost quite a bit of weight, but then slowly put it back on (but trust me - i worked at it - ate a lot of junk food!!). I think that wellbutrin helps to relieve the cravings for both food and smoking - which is why Dr.'s prescribe it for things other than depression. I don't think if you discontinue it, you will gain weight, unless you all of a sudden increase your food intake by a lot.