<prompt> Ursodeoxycholic acid is aUrinary Stone dissolving drugThrombolytic drugGallstone dissolving drugAntifibrinolytic  <response>: Medical therapy of Gallstones Medical therapy of gallstones utilize bile acids : Chenodeoxycholic acidCDCA and Ursodeoxycholic acidUDCA Mechanism of Action : They inhibit HMG-CoA reductase, rate limiting enzyme for cholesterol synthesis, thus decreasing cholesterol saturation of bile They cause disruption of cholesterol from the stones by physicochemical means Ref: Sabiston 20th edition Pgno : 1494 