Preparing for an endoscopy: tips from a consultant gastroenterologist

While the process itself is straightforward, proper preparation for an endoscopy is essential to ensure accurate results and a smooth experience.

In this article, consultant gastroenterologist Dr Ahmed Shalabi guides you through what to expect, how to prepare, and practical tips to make the experience as smooth as possible.

What is an endoscopy?

Endoscopy involves inserting a thin, flexible tube with a camera into the digestive tract, either through the mouth (gastroscopy) or the bottom (colonoscopy). It helps diagnose conditions such as ulcers, inflammation, or polyps and can sometimes allow treatment during the procedure.

Why preparation matters

Proper endoscopy preparation is essential. A clear view of the digestive tract allows the doctor to make accurate diagnoses, reduces the risk of complications, and can make the procedure quicker and more comfortable.

Preparing your body

Your doctor will give specific guidance depending on the type of endoscopy.

• Gastroscopy: avoid food for 6–8 hours beforehand.
• Colonoscopy: follow a clear liquid diet for 24 hours and take prescribed laxatives to empty the bowel.

Medication considerations

Inform your doctor about all medications you take. You may need to adjust blood thinners, diabetes medication, or supplements. Do not stop prescribed medication without guidance.

Hydration and comfort

Drink clear fluids as allowed, and avoid alcohol the day before. Wear comfortable clothing and arrange for someone to accompany you home, especially if sedation is used.

Mental preparation

Knowing what will happen can reduce anxiety. Endoscopy is generally well-tolerated and takes only a few minutes for diagnostic procedures. Sedation or local anaesthetic sprays can help you feel relaxed.

Ask questions

Write down any questions for your gastroenterologist. Understanding why the procedure is needed, what will happen afterwards, and what to expect in recovery helps you feel in control.

After the procedure

You may feel bloated or slightly sore. If sedation was used, rest for the remainder of the day and avoid driving or operating machinery. Mild throat discomfort is normal after gastroscopy.

Follow-up

Your doctor will explain any findings and next steps. If biopsies were taken, results may take a few days. Report any unusual pain, bleeding, or persistent discomfort immediately.

Proper endoscopy preparation ensures a smoother procedure and helps your doctor make accurate diagnoses.