Health LibraryTests & ProceduresColonoscopy: Purpose, Preparation, and Recovery
Tests & Procedures

Colonoscopy: Purpose, Preparation, and Recovery

The gold-standard exam for the large intestine.

Medically reviewed
Updated 2026

Preparation

A day of clear liquids and a bowel-prep laxative. This is the least pleasant part — but it is essential for accurate results.

What to expect

Usually done under sedation. Any polyps found can often be removed during the same procedure.

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