My gall bladder operation done in 2013 my microsurgery. Since 2015 often had vomiting with in 2-3 months. But now usg, endoscopy normal, then my doctor suggested ct scan, my report cbd dilated, cbd measurement 15 mm. And have calculus/stone. My doctor suggested for ercp. My questions have any medicine instead of surgery ercp those clear the stone? At the situation ercp is must required or not? If I change my life style, heavy water, timely food habits, exercise etc with medicine it clear properly? Please suggest me with proper guidance.