I found the prep worse than the procedure itself. Had it quite a few times over period of 2 years until getting all clear after my operationI was finally empied out four hrs after my appt so next time i am going to fast for two days and take the prep a couple of hours before told to do it , it was a bit uncomfortable in places , when she was up to my small bowel but the gas and air was enough , not keen to do it again, the prep is gastly isnt it