Colonoscopy Guide
4

The day itself

What happens on the day

  1. ArrivingYou check in, change into a gown, and a nurse places a small IV line in your arm. The doctor or nurse goes over the procedure and asks you to sign a consent form. This is a good time to ask questions.
  2. SedationMedicine through the IV makes you sleepy or puts you to sleep. Many people remember nothing of the procedure. Some feel a little pressure or cramping.
  3. The procedureYou lie on your side. The doctor gently passes the scope through the colon, using air or gas to open it up for a clear view, and removes any polyps. It usually takes 30 to 60 minutes.
  4. RecoveryYou rest while the sedation wears off, often 30 to 60 minutes. Gas and bloating are common. The doctor may tell you what they saw before you leave.
  5. Going homeYour driver takes you home. Plan for 2 to 3 hours at the center in total.

Why you need a driver

Sedation slows your reactions and judgement for the rest of the day, even if you feel fine. Most centers will not start unless an adult is there to take you home. Many do not allow a taxi or rideshare on your own.

For the rest of the day: don't drive, go to work, drink alcohol or sign important papers. Most people eat normally afterwards unless told otherwise.

Sources: American Cancer Society; US Multi-Society Task Force on Colorectal Cancer.Clinical review: Dr Aasma Shaukat · 29 Oct 2026

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