Colonoscopy

Careful investigation, clear explanations and considered follow-up.

A colonoscopy allows the lining of the large bowel to be examined and, when appropriate, biopsies to be taken or polyps removed during the procedure.

Why might colonoscopy be recommended?

Your GP or specialist may recommend colonoscopy after considering your symptoms, medical history and previous investigations.

  • A positive bowel-screening test
  • Rectal bleeding or a persistent change in bowel habits
  • Iron-deficiency anaemia or suspected gastrointestinal bleeding
  • Previous bowel polyps or an increased family risk
  • Assessment or surveillance of inflammatory bowel disease

What to expect

You will receive specific bowel-preparation and fasting instructions before the procedure. Colonoscopy is generally performed with sedation. A flexible instrument with a camera is used to examine the bowel, and biopsies or polyps may be removed when clinically appropriate.

Findings and the plan for results or follow-up will be explained to you. Preparation, medication and recovery instructions vary, so follow the advice supplied by your treating team and procedure facility.

Colonoscopy questions

Does a positive bowel-screening test mean cancer?

No. It means blood was detected and further assessment is needed. Polyps, haemorrhoids and inflammation are among other possible causes.

Can polyps be removed during colonoscopy?

Many polyps can be removed during the procedure, depending on their size, appearance and location.

Will I have sedation and need someone to take me home?

Colonoscopy is generally performed with sedation. You will need to arrange for a responsible adult to take you home and follow the facility's instructions about driving, work and important decisions after the procedure.

Should I stop my medicines?

Do not stop prescribed medicines unless instructed. Tell the practice about blood thinners, diabetes medicines and other relevant treatments so individual advice can be provided.

Are there separate procedure costs?

The practice team will explain the specialist fee and expected out-of-pocket cost before your procedure is confirmed. Hospital, anaesthetist and pathology fees may be billed separately where applicable.

General information: Healthdirect Australia.

Clinical information by Associate Professor Abhinav Vasudevan, FRACP, PhD. Reviewed 17 September 2026.

Appointments and referrals

Arrange a colonoscopy consultation

Tell us briefly what care you are seeking and a member of the practice team will aim to contact you within two business days about the next step. Responses may take longer during public holidays and planned practice closures.