I second that emotion! I always find it better to let my body recover from fasting, eating a cleansing, rebuilding diet until digestion is fully reestablished before flushing.
BTW, I have flushed copious amounts of bile throughout very long fasts... but of course I am a special case and I know some of that was stored sandwiched between layers of antique mucous and stapled to my poor abused colon!
Like so many, I cannot recommend Liver Flushing until no stones come out highly enough. Fasting and Liver Flushing were two of the main ingredients in the program that restored me to vibrant good health. It does require patience (took me about 6, one every two weeks to get a major load of stones out), but is so well worth the effort.