The sample size was selected based on the number of obese patients who underwent SG at our Bariatric Center of Excellence IFSO-EC over the last 12 months, and the end-time of evaluation was estimated independently due to the lack of high evidence-based studies, such as randomized trials or
The design is a 1:1 random assignment to placebo or bupropion XL (extended release) (300mg/d). The study biostatistician, will prepare the randomization schedule and include blocking by gender and nicotine dependence. Randomization will be based on a stratified block design, with gender and nicotine