Several investigators have demonstrated little acid production in the gastric bypass pouch. Despite this data, acid secretion has been hypothesized as a predominant factor in the development of GJ stricture. This hypothesis is supported in part by the frequent finding of ulcers at the site of stricture in up to 55% of patients. The purpose of this study is to determine whether suppressing acid production by administration of daily proton pump inhibitors in the early post-operative period will reduce GJ anastomosis stricture rate.