Ursodeoxycholic acid (UDCA) has beneficial effects on symptoms, liver
biochemistry and, possibly, liver histology in primary biliary cirrhos
is and other cholestatic liver diseases. UDCA may exert these benefici
al effects by a direct hepatoprotective effect, by influencing the ent
erohepatic circulation of endogenous bile salts, by enhancing bile flo
w through a cholehepatic shunt mechanism or by immune modulation. In t
he present article, established and potential indications for UDCA are
reviewed.