Alcohol is a “triple threat”, it’s high in calories, it stimulates hunger and it promotes eating of high fat/high carbohydrate foods. Patients after many bariatric surgeries are at increased risk of developing alcohol dependency disorders after surgery, and regular alcohol consumption after Bypass surgeries will reliably cause stomach ulcers to develop.
With this in mind however, occasional alcohol consumption is safe once the stomach has healed at around 1 month post-operatively.