Urgent prep instructions

I haven't but you could probably call his doctor or call a pharmacy and they should know what to do.

hopefully that will do the trick. It should at least be good enough. Put it this way, I had a colonoscopy without any prep at all as it was a kind of last minute emergency one cos I was in pretty bad condition. And infact even tho I ate just a few hours before it (I only got 2 hours warning I was having Colonoscopy) and because my colitis was spewing things out at such a rate, my gut was empty and clean (apart from blood and mucus)

so if he takes stuff and drunks lots of water and doesn't eat, then I'm sure he will be clean enough inside!