The term "colonoscopy" means looking inside the colon. It is a procedure performed by a gastroenterologist, a well-trained subspecialist.
The colon, or large bowel, is the last portion of your digestive or GI tract. It starts at the cecum, which attaches to the end of the small intestine, and it ends at the rectum and anus. The colon is a hollow tube, about five feet long, and its main function is to store unabsorbed food products prior to their elimination.
Well, after the explanation, imagine they did that on my mom!? Yes, my Mother went through Colonoscopy procedure.
I spent the whole half day in the hospital, waiting for its to get over. Thank GOD, Mom is all right. No additional medication and Doctor said, she is perfect and can start eating again. :D