1. Drugs used for acid-peptic disorders 1) Peptic ulcer disease (PUD, 消化性溃疡) 2) Gastroesophageal reflux disease (GERD) 3) Drug-induced mucosal injury, especially by non-steroidal anti-inflammatory drugs (NSAIDs) 4) Pathologic acid-hypersecretory conditions (e.g. Zollinger-Ellison syndrome) 5) Acute stress ulcers 2. Modulators of gastrointestinal functions 1. Antiemetic drugs 2. Prokinetic drugs 3. Anti-diarrheals 4. Laxatives