Prep kits
A jug of powder you fill with water, giving four liters of solution. Sold as Colyte, NuLytely and TriLyte as well.
Eight ounces every ten to fifteen minutes until the target volume is gone. Usually split, half the night before and half in the morning.
The volume is the whole difficulty. Chilled, through a straw, with something clear you like to chase each glass, is the standard advice and it genuinely helps.
The planner turns those numbers into clock times, with your cutoff and check-in worked out from them. For GoLYTELY that usually means:
Four liters is around sixteen glasses in total, so eight per dose on a split.
These are the usual shape, not your dose. Units vary the regimen, the split and the timings, and the sheet your office gave you is the one that counts. Change anything here that differs from yours.
More on what counts as a clear liquid, and what to do if the prep is not working.
Build your own plan