Hey Sue,
I had one colonscopy done about 6 years ago now... whenever I see someone post regarding their experience still feels like yesterday.
I recall the prep drink very well... yes, first two glasses not so bad, the you realize there is a whole lot more to drink. I could not imagine having to do this in hospital as well. I did at home.
I woke up during my procedure... I believe others were not knocked out for theirs from reading prior accounts. I could not imagine this as I was in pain when I woke up.
Take care,
Tim