Barrett's Esophagus - 315 - 3 Way Cross-Over

Inclusion Criteria: * Must have a previously established, biopsy-proven diagnosis of Barrett's esophagus with segment length greater than 3cm, with no dysplasia or adenocarcinoma within the previous 12 months Exclusion Criteria: * A history of esophageal, gastric, or duodenal surgery, including anti-reflux surgery or endoscopic anti-reflux procedures, except for simple closure of a gastric or duodenal ulcer. * History of various gastrointestinal diseases - please see investigator for full list. * Evidence of any malignant disease in the last 5 years, except minor superficial skin disease. * Unstable diabetes mellitus. Stable on a controlled diet, oral agents or insulin are acceptable.