Not like days or anything. I have an early afternoon appointment on Tuesday. Instructions say drink first lot of prep over an hour, starting at 9pm the day before, then second lot starts at 6am. Also says it may take 2 hours to work, so that's in bed at the earliest midnight then up again around 5:45 to get it organised.
WIBU to follow the instructions for the morning appointment instead? Would be 6pm and 9pm tomorrow.
It's Plenvu if that makes any odds.