a double-blind randomized , multicenter study was carried out to determine the efficacy and safety of ursodeoxycholic acid ( udca ) at 4 doses of 2.1 to 16.2 mg x kg-1 x day-1 , and chenodeoxycholic acid ( cdca ) at the dose of 16.9 mg x kg-1 x day-1 , in 197 patients treated for up to 1 year for radiolucent gallstones in functioning ( opacified ) gallbladders .
C0008350
gallstones
C0016976
gallbladders