What a bunch of pansies........Just kidding, Over 200 stones either passed or busted up internally. I passed a 17mm stone!!! Doctor said not possible and then I put it on his desk along with the BAG full of many others. I had a jar full that the Wake Forrest Hospital took for study. You need to find out what kind they are and treat accordingly. The Potassium Citrate helped me a lot but I have the Uric Acid stones. 7 Internal procedures over about 2 years including the first two where the doctor said he lost count of them all while laser blasting them internally. I actually walk around most of the time with some. I have a 12 mm one in at the moment good times......