Was on Wellbutrin in 06 within 10-11 weeks I had lost about 60 lbs. I was also walking on the treadmill everyday and eatng healthier. But I think it curbed my cravings. It also made me a little aggressive. I would stand up for my self a little too much. I thought I was going to end up beating someone up for taking my parking space once. I had to get off of it. I tried it again last year because I kinda missed the confidence it gave me, but this time it made my heart race like crazy, certain sounds were making me feel nuts and I found myself yelling too much at my poor kids.
It started working for my depression at about 25 days. It instantly curbed my appetite. Good luck hope it helps u out.