My gallbladder was removed in 1994 because of a small stone in the common bile duct. It was at the point in the duct after the pancreas duct joins the common bile duct, therefore also causing panreatitis. Since then I have had gall stones removed by ERCP on two occasions. Both times I became quite ill before the diagnosis warranted ERCP. On the last occasion I had cholangitis. I have been taking urso 300mg twice a day for one month.