Oh, the prep- if only it were easy! I have family history and started age 35, and have gone in 3 year intervals until this year- told I can stretch out to 5.
A week prior I stop vitamins, supplements, and Advil. 5-6 days prior I shift my diet to no red meat, seeds, nuts, low fiber. Two days before I take a dulcolax and eat lightly easily digestible food like bread and rice. Prep day I take 1 dulcolax, have some toast with jelly and coffee and start the drink around 4 pm. I get through about 1/2 to 2/3 of the drink before I’m clear. Directions are to drink it all, but with the 2-day ‘prep’ (for me it is taking the dulcolax over two days), I’m clear we’ll before. I’ve done this 3 times and my doc approved (for me). I just can’t drink all that liquid- it makes me vomit. Maybe a longer prep will work better for you too for your own reasons.
If it’s your first one, ask your doc to clarify the ‘several days concept’. The goal is to be empty of everything when you go in for the procedure. Great that you are going - hope your test goes well!