in a double-blind controlled study of ursodeoxycholic acid ( 400 and 800 mg/day ) and chenodeoxycholic acid ( 375 and 750 mg/day ) , in comparison with placebo , ursodeoxycholic acid was significantly more effective than chenodeoxycholic acid in dissolving gallstones after 12 mo of treatment .
C0042105
ursodeoxycholic acid
C0008350
gallstones