Ulcer Prevention Study in Post Gastric Bypass Patients

Inclusion Criteria: * Subject is age ≥ 18 years * Patient meets the criteria for laparoscopic gastric bypass surgery * Females only: Patient is willing to take a urine pregnancy test Exclusion Criteria: * Subject allergic to omeprazole or famotidine * Patient receiving antifungal (i.e. ketoconazole or itraconazole) * Hepatic insufficiency * History of Crohns disease * History of Zollinger-Ellison disease * Patient received an investigational drug within 30 days of enrollment * Patient currently enrolled in another research project * Females Only: Pregnancy or plan on becoming pregnant during the next 14 weeks