Prazole 20 mg Capsule contains Omeprazole, a proton pump inhibitor (PPI) that reduces stomach acid production by inhibiting the H⁺/K⁺ ATPase enzyme in gastric parietal cells. This action helps in treating acid-related conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. It also aids in the healing of erosive esophagitis and is used in combination therapies for Helicobacter pylori eradication.