Hi,I am having a colonoscopy done on Mon also. I was given Visicol tablets to be taken every 15 min for 1 1/2 hrs. I have to take 3 of them at a time and they are very large. When you say you have to take fleet with water do you mean fleet phospho-soda? And how many oz. of water. I was going to take that also but I didn't take the laxitives so I guess I will have to try the pills and hope I don't throw up. In answer to your question,yes there could and most probably will be more left. I would do exactly as directed because you don't want to get there and be told you are not cleaned out enough to do the colonoscopy. As for the sedation,you will not be put to sleep compleatly. Just enough to relax and make you drowsy although some people do think they are sleeping. Last time I had this done I never sleeped at all and watched the whole thing on the computer. Good luck and if you have any more questions I will be checking back all day.