Ilaprazole is primarily used in the treatment of gastrointestinal disorders, particularly those related to excessive stomach acid production. It is commonly prescribed for conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. The drug works by inhibiting the proton pump in the stomach lining, effectively reducing acid secretion and providing relief from symptoms like heartburn, acid regurgitation, and stomach pain. It is also used in combination with antibiotics to treat Helicobacter pylori infections, which are a major cause of gastric ulcers. Additionally, ilaprazole is sometimes employed in the management of stress-related mucosal damage in critically ill patients. Its long-lasting effect allows for once-daily dosing, improving patient compliance and convenience.