<human>: What are the most important things I should know about colonoscopies?
<bot>: 
1. The most important thing to know about a colonoscopy is that it's an examination of your colon.
2. You will be sedated during the procedure and may feel some discomfort or pain, but you can tell the doctor if you need more medication.
3. Your doctor will examine your entire colon with a flexible tube called a colonoscope.
4. Afterwards, you'll be given a laxative so that your bowel can clear out any remaining material from the exam.