After bariatric surgery the risk of alcohol use disorders is increased. This risk is greater after Roux-en-Y gastric bypass than after sleeve gastrectomy or gastric banding. These differences can be explained by modification in alcohol metabolism after gastric bypass, which increases peak alcohol levels. Other mechanisms that might be responsible for increased alcohol use disorders after bariatric surgery are neuro-biological contributors and addiction transfer from binge eating to alcohol consumption. Collaboration with a team specialized in alcoholism treatment is needed for the management of such patients.