I was a low-risk colonoscopy. Routine after 10 years. No polyps, so great result.
The prep my doc prescribed was SuTab. He provided his own instructions. I don't enjoy fasting, so I scheduled my colonoscopy for very early in the morning. As it turns out, that was the worst plan. My experience with SuTab is that it is *very* precise. You take the 12 pills and things commence within 1/2 hour. 2 hours later, you are done with the first prep and can sleep until the 2nd prep.
Understanding this, the instructions say take the first 12 pills between 6-7 PM, which should finish up around 9 PM. The second set of 12 pills are taken 5 hours before your scheduled appointment. Mine appointment was for 6:45 AM, so I was taking them at 1:45 AM. A better strategy would have been to schedule the colonoscopy for 11 AM or noon, and get a better nights sleep. The instructions said to fast for 30 hours prior to the appointment. With each set of 12 tablets, you need to drink 48 oz of water.
For me, SuTab was not at all painful or problematic. Did what it was supposed to do, promptly and quickly. Can't say I enjoyed it, but it's not something to dread.
CTRetiree