Ursofalk must not be used in the presence of: acute inflammation of the gallbladder and bile ducts; occlusion of the biliary tract (common bile duct).
Ursofalk should not be taken where the gallbladder cannot be visualized at X-ray, in patients with calcified or X-ray dense gallstones (non-cholesterol gallstones), disturbed contractility of the gallbladder, gallbladder filled more than half with gallstones, occlusion of ductus cysticus, frequent biliary colic.