Some of the worse ulcers ever were at the anastomosis of a gastric bypass patient who started drinking a little wine again - 14 year post op!!!! Many others, as well. Those surgical tissues remain fragile forever, I'm thinking. Alcohol is a terrible irritant to tissue of any kind, but for surgical areas, even worse. Everyone makes their own decisions and takes their own risks, but for me, alcohol is on the "never again" list.