This document provides information about Gastroesophageal reflux disease (GERD), esophagitis, peptic ulcers, and current proton pump inhibitor (PPI) treatment options. It then introduces D-Proton, a new PPI containing dexlansoprazole, indicating it can overcome drawbacks of conventional PPIs. Details are provided on the drug's mechanism of action, dosing for GERD and erosive esophagitis, target doctors, the PPI market landscape, and marketing guidelines to achieve sales targets for D-Proton.