Ursofalk should not be used in patients with: acute inflammation of the gall bladder or biliary tract; occlusion of the biliary tract (occlusion of the common bile duct or a cystic duct); Frequent episodes of biliary colic; Radio-opaque calcified gallstones; Impaired contractility of the gall bladder; Hypersensitivity to bile acids or any excipient of the formulation.