<prompt> Ursodeoxycholic acid is a :Urinary stone dissolving drugThrombolytic drugGall stone dissolving drugAntifibrinolytic  <response>: Medical therapy for gallstones utilizes bile acids: Chenodeoxycholic acid CDCA and Ursodeoxycholic acid UDCAMechanism 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 