CHOLURSO, commonly known as ursodiol, is a medication primarily used to treat and prevent certain types of gallstones, as well as to manage primary biliary cholangitis (PBC), a type of liver disease. Ursodiol works by reducing the production of cholesterol in the liver and by dissolving the cholesterol that makes up gallstones. This action helps to decrease the formation of gallstones and can alleviate symptoms associated with gallstone blockages, such as pain. In the case of PBC, CHOLURSO helps to slow the progression of liver disease by improving liver function and reducing liver inflammation. It is available in tablet form and is usually taken orally, with the dosage and treatment duration depending on the specific condition being treated.