Ursodeoxycholic acid is a :

• Medical therapy for gallstones utilizes bile acids: Chenodeoxycholic acid (CDCA) and Ursodeoxycholic acid (UDCA) Mechanism of Action • They inhibit HMG-CoA reductase, the rate limiting enzyme for cholesterol synthesis, thus decreases cholesterol saturation of bile • They cause dispersion of the cholesterol from the stones by physico-chemical means