His research interests include pharmacological treatment of peptic ulcer disease, pathophysiology and treatment of H. pylori infection, prevention of upper gastrointestinal adverse events associated with NSAIDs and diagnostic utility of small bowel capsule endoscopy. He is an advocate of evidence-based medicine. He is serving on editorial boards for nine journals, including his position as the deputy coordinating editor for the Cochrane Upper Gastrointestinal and Pancreatic Diseases Group, and as Associate Editor for Stomach for the American Journal of Gastroenterology.