Ursodeoxycholic acid can be chemically synthesized. Ursodeoxycholic acid reduces cholesterol absorption and is used to dissolve (cholesterol) gallstones in patients who want an alternative to surgery. The drug is very expensive, however, and if the patient stops taking it, the gallstones tend to recur if the condition that gave rise to their formation does not change. For these reasons, Ursodeoxycholic acid has not supplanted surgical treatment by cholecystectomy.
UDCA is used to treat primary biliary cirrhosis. In children, its use is not licensed, as its safety and effectiveness are not established. Ursodeoxycholic acid reduces elevated liver enzyme levels by facilitating bile flow through the liver and protecting liver cells.

1,  Ursodeoxycholic acid Can increase the secretion of bile acid.

2,  Ursodeoxycholic acid Reduce cholesterol in bile and cholesterol ester. 

3,  Ursodeoxycholic acid Is conducive to the cholesterol gradually dissolve gallstones.

4,  Ursodeoxycholic acidShould not be used for surgical treatment of cholesterol stone, but cannot dissolve the bile pigment stone, mixing and opaque X line of stones.