I had a total proctocolectomy with end ileostomy, and I did not have to drink any Phospho soda or Go Lytely....I just had to stay on only clear liquids for 2 days before my surgery!
The idea was that my small intestine would definitely be cleaned out by then (nothing stays in the small intestine very long), and if there was some poo still left in my colon, it did not matter because that whole thing was coming out anyway.
I did not have any infection problems afterward, and I was so happy to not have to drinkt he prep!
I hope you also do not have to...I can handle pain without batting and eye, but I truly DREADED drinking the prep, so I can commiserate!