How Large A Stone Will This Work For?

I read on a site that also has flushing ingredients that it is not safe to do so if stones are over 2 millimetres in size as they can get lodged. What is the experience of people in this forum that have used the Clark method of flushing. Have any of your had very large gall stones that successfully flushed without damage?
Thank you. (My husband is suppose to see a surgeon today, so please answer soon.) Tweet