Hi....
Wellbutrin is known for causing weight loss in most people who take the med. I lost a little weight when I first began taking the drug but then was placed on Abilify which caused me to gain weight so then it canceled the weight loss out.
The average weight loss for Wellbutrin is 8-10 pounds from what I have read. Some people lose more or less; it depends on each person as every drug effects each person differently.
More than likely if your pdoc prescribed Wellbutrin, you are more apt to lose some weight with it.

Don't be afraid of it. Give it a try!
I take it..... It is a great med.
Coffeegirl