I just had a colonoscopy this morning and since I received plenty of good advice here, I thought I should relay my experience to the group.Prep: I did the Miralax prep with four ducolax tablets. This prep was not too bad. I took the ducolax at 3PM and then I drank 8 glasses of Miralax mixed with gatorade from 5PM to 7PM. You can barely taste it so that is not a problem. It also does not cause any discomfort; you simply must use the restroom frequently starting about 90 minutes after the first glass and ending 5 hours later. ONE CAUTION: I did not drink enough fluids after the Miralax as I felt very full and was not thirsty. I think I just had a couple of cups of tea and a few sips of gatorade. THIS IS NOT GOOD. I was very dehydrated and felt terrible when I arrived for the test and they had to give me IV fluids. I think this can be avoided by continuing to drink fluids until bed time. The Test itself was easy for me. They used Propofol, I slept through the whole thing, when I woke up I was kind of gassy, I broke wind a few times, and now I am home feeling kind of wiped out and hungry and looking to rest a little, eat a light lunch and then sleep the rest of the day.The good news is that the doctor said everything was normal. I guess I have IBS?I hope this helps anybody who wants to know what a colonoscopy is like. The prep is bad, but not that bad. (by the way, I had the upper endoscopy last month with the same drug Propofol and that was very easy because there is no prep).