I just turned 50 and got mine done, they found one, typical polyp they removed and told me to come back in 5 years. When my wife had hers done she had to start in the morning and drink that horrible liquid all day, hers was like a big jug of pink liquid. For me, I had two 8 oz bottles that I mixed with tap water. I was not to eat anything solid the day before the procedure so I ate jello, hard candy, broth and popsicles all day. At 6:00 pm I drank my first bottle of stuff. I was spewing liquid from 7:00 PM until 1:00 AM. At 4:00 AM I woke up and drank the 2nd bottle and I was shooting out orange liquid until 1/2 hour before the procedure, honestly, I was afraid I was going to have an accident during the procedure. I mentioned it ahead of time and they were like "meh, whatever, it happens don't worry about it."
Rodrigo Duterte, it's YOUR body man, you do it now if you damn well want to and if your family doctor won't prescribe it (as mine did) then I would get a new family physician. I have zero family history of it but two of my brother-in-laws have had colon cancer, both found it at age 55 on their 2nd colonoscopy, this was years and years ago so I don't recall the details. I do know that both of them told me to make sure I got mine done, both said it saved their lives, both said their Dad's did not die of colon cancer (both died of heart attacks though.) But the thing is, it's such a routine procedure, honestly there is absolutely no reason to not get it done.