SuPrep, not so bad tasting and less volume to drink.
HalfLytely wasn't so bad as the Go and Nu Lytely products, again less volume.
Both are script
items so you need a doctor to cooperate and script
one or the other.
You might try calling the hospital's endoscopy department and ask them what prep they use for in-hospital patients and explain it was so much easier on you you want to ask your gastro to script
it for you for your next colonoscopy.
I'm guessing it might well be SuPrep.
Once you manage to get the bilge-water tasting prep prep down the key to a really clean colon is the amount of clear liquids you can drink right up until NPO time. The prep makes you "gotta go", the clear liquids are what do the vital rinsing.