That is a great question. I have flushed 6 times now (get ready for the 7th today), and still had an attack the day before yesterday. That was my 5th attack since I discovered my gallstone and had a flush soon after about one year ago. I did a flush right after each attack. My first flush seems worked the best, and I did not get an attack in 10 months. Then the attack becomes more frequent. Almost once every month even though I did the flush after each attack. Does anyone else have the samiliar experience? I wonder when my attack will really goes away.