Or go without sedative. Then you can chat with the doctor as he does his thing. I don’t find it very painful, and i like that i can drive myself home and get on with my day.
I think different doctors have different opinions re appropriate prep, and the prep varies widely right now, depending on your doctor. Mine had a very rigid regimen that included drinking gallons of grossness. I used a long plastic straw to transport the stuff past my tongue, so i didn’t really have to taste it.
If you have strong feelings about the prep, or any other aspect of a colonoscopy, it’s worth discussing this in advance.