Toprazele (Pantoprazole) is a proton pump inhibitor (PPI) that reduces gastric acid secretion by irreversibly inhibiting the H+/K+ ATPase enzyme in the gastric parietal cells. It is used to treat conditions like gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome by promoting healing and symptom relief.