Efficacy of Pantoprazole in Patients Older Than 18 Years Who Have Symptoms of Non-erosive Reflux or Gastroesophageal Reflux Disease (BY1023/DE-004)

Main Inclusion Criteria: * Written informed consent * Inpatients (hospitalization during the entire study period is mandatory) * Symptomatic (heartburn, acid regurgitation or dysphagia for at least 1 day since admission to the hospital) non-erosive reflux disease (NERD) or erosive gastroesophageal reflux disease (GERD, LA Grade A-D) Main Exclusion Criteria: * Known Zollinger-Ellison syndrome or other gastric hypersecretory condition * Previous acid-lowering surgery or other surgery of the esophagus and/or upper gastrointestinal tract (exception: polypectomy and cholecystectomy) * On initial endoscopy, presence of obstructive esophageal strictures, Schatzki's ring, esophageal diverticula, esophageal varices, achalasia or Barrett's esophagus with known high-grade dysplasia or longer than 3 cm * Acute peptic ulcer and/or ulcer complications * Pyloric stenosis * Known inflammatory bowel diseases