Revision in morning//I cant get this bowel prep stuff down

Can anyone offer any advise on this bowel prep gallon of stuff I have to drink???? OMG it is aweful and I have only had one 8 oz glass so far. I think it will all be coming up before I'm done. My first surgery I didn't have a special pre-op diet or bowel prep. I wonder why now????

how did the revision go?