Peptic ulcer disease, H. pylori infection, Gastro-oesophageal reflux disease, Zollinger-Ellison syndrome, Oesophagitis, Acid-related dyspepsia, NSAID-associated ulceration, ulcer resistant to H2 receptor antagonists, Gastrointestinal (GI) bleeding from stress, Prophylaxis for acid aspiration syndrome during induction of anaesthesia