S.M.
Hi, I haven't had one myself, but was just reading in Prevention magaizine recently that even though many Dr.s will tell you to start your "treatment" (the drink) the night before, (usually half at night and half in the a.m.), that is has been shown to be just as effective and much easier on the patient to drink all of it the morning of the procedure instead. You would need an afternoon appointment, but the cramping and stomach pains are supposed to be easier to deal with after a full nights sleep. It also suggested eating very light a day or two before, to help ease these effects. Sounds like the "pre-treatment" is more uncomfortable than the procedure itself, but these tips are supposed to help. Good luck!!