Had a colonoscopy this morning, that went fine and now we're just waiting to get the results of the biopsies.But last nite was wicked...... the first part of my evening went very well..... I took 4 bisacodyl tablets in the afternoon about 2:30, then I drank the magnesium citatre prep at 6:00..... had the usual bathroom runs for a couple hours..... then went to bed at around 9:30. But then, I woke up at 2:30 in the morning, had to hit the bathroom again.... but this time I got sweaty, chilled and extremely dizzy.... I just kept on feeling worse so I managed to somehow get back to my bedroom, next thing I remember I was waking up, flat on my back on the floor, in front of the closet door in my bedroom. I am not sure how long I was laying there out, but I was so weak and so dizzy I had to lay there for quite awhile after I came to.....I live alone, so all I had for help were my pets.... my one dog was so scared he was shaking, he didn't know what was happening. I managed to crawl, literally, back into bed..... and that is where I managed to stay until a friend (my driver for this morning) called me at 5:00.I wonder if this is something to be concerned about, my doctor seemed quite concerned about it..... or does this happen sometimes with the prep? But I went down and I hit the floor and I have no memory of that, so I was really out.