(S)-(-)-Pantoprazole Sodium Salt is primarily used in the treatment of gastrointestinal disorders. It is a proton pump inhibitor (PPI) that effectively reduces stomach acid production, making it beneficial for managing conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. By inhibiting the H+/K+ ATPase enzyme in the gastric parietal cells, it helps alleviate symptoms like heartburn, acid regurgitation, and stomach pain. Additionally, it is often prescribed to prevent damage to the esophagus caused by chronic acid exposure and to aid in the healing of erosive esophagitis. Its enantiomeric purity ensures improved efficacy and reduced side effects compared to racemic mixtures.