A colonoscopy screening is one of the most effective ways to examine the inner lining of the large intestine (colon) and rectum. Using a thin, flexible tube with a camera, your doctor can detect precancerous polyps, diagnose inflammatory conditions and screen for colorectal cancer.
While the procedure itself is quick and safe, what really makes the difference is good preparation. A clear bowel allows the doctor to clearly visualise the intestinal walls, improving the quality of the examination and reducing the likelihood of needing a repeat procedure.
Here are eight practical tips to help you prepare for your colonoscopy so the process feels as smooth and comfortable as possible.
1. Follow Your Doctor’s Instructions Carefully
Based on your medical history and overall health, your doctor will provide detailed preparation instructions. These may include dietary adjustments, fasting and the use of bowel-cleansing solutions to ensure your colon is completely clear before the procedure.
Your doctor may also give specific medication guidelines depending on your individual circumstances. In some cases, you may be advised to adjust or temporarily stop taking certain medicines—such as blood thinners, diabetes medications or specific supplements—as these can interfere with the procedure or increase potential risks. Always follow your doctor’s advice carefully to ensure a safe and effective examination.
2. Start Preparations Early
Plan your schedule and gather what you’ll need in advance. This may include:
- Time off work: Allow enough rest and flexibility around the procedure day.
- Bowel prep solution: Purchase the prescribed bowel-cleansing solution as directed by your doctor.
- Toiletry essentials: Stock up on toilet paper, wet wipes and petroleum jelly to prevent irritation from frequent bowel movements.
- Dietary preparation: Organise meals that follow a low-residue diet before the procedure.
Early preparation gives you time to address any concerns and helps avoid last-minute stress, ensuring you have everything you need for a smooth experience.
3. Stay Hydrated
Bowel preparation and dietary restrictions can sometimes lead to fluid loss. Drinking plenty of fluids helps prevent dehydration while supporting your body’s natural cleansing process.
Focus on clear fluids such as water, clear broth, herbal teas and electrolyte-enhanced drinks (avoiding red, purple or blue dyes). Begin increasing your fluid intake 24 to 48 hours before starting your bowel preparation.
You can monitor your hydration status by observing the colour of your urine and noting any symptoms of dehydration (such as dizziness), excessive fatigue or reduced urination.
4. Understand Dietary Restrictions
Your doctor will give you detailed dietary instructions to follow in the days leading up to your colonoscopy.
- Two to three days before: Switch to a low-fibre or low-residue diet. Choose foods such as white rice, eggs and lean meats, and avoid high-fibre items like whole grains, nuts, seeds and raw vegetables.
- One day before: Transition to a clear liquid diet, including water, clear broths, plain tea (without milk) and clear juices without pulp. Avoid red or purple liquids.
Planning your meals ahead of time helps ensure you stay on track and reduces the chance of delays or cancellations on procedure day.
5. Prepare for Bowel Cleansing
Bowel cleansing is one of the most important parts of colonoscopy preparation. It involves taking the prescribed laxative or bowel preparation solution to completely empty your colon before the procedure.
While the process can be uncomfortable, following your doctor’s instructions carefully helps ensure a clear view of the colon and avoids the need for a repeat test.
Helpful tips:
- Chill the solution before drinking — this can improve the taste.
- Use a straw to reduce the salty flavour.
- Stay near a toilet once you begin, as bowel movements will start within a few hours.
- Apply petroleum jelly or barrier cream to prevent skin irritation.
- Drink clear fluids between doses to stay hydrated and support cleansing.
6. Keep Yourself Comfortable
Taking care of your physical comfort can make a big difference in how you feel before and after the procedure. On the day of your colonoscopy, wear loose, comfortable clothing like soft shorts or sweatpants so you can move and rest easily.
Because frequent bowel movements may cause irritation, keep soft or wet wipes nearby and apply a gentle barrier cream to protect the skin.
After your procedure, have a cosy space ready at home with clear fluids and light snacks within reach. Giving yourself time to rest and recover will help you feel more comfortable as your body settles.
7. Ease Pre-Procedure Nerves
It’s normal to feel a little uneasy before a colonoscopy, but there are ways to make the experience more comfortable. Simple relaxation techniques such as deep breathing, gentle stretching or guided meditation can help release tension and steady your mind.
You might also find comfort in light activities like reading, watching a favourite show or listening to soothing music. If you still feel nervous, talk to your doctor for reassurance and practical advice.
8. Arrange Post-Procedure Support
Sedation is usually given during a colonoscopy to keep you comfortable, but it can leave you feeling sleepy or a little disoriented afterwards. For this reason, it’s best to have a trusted friend or family member accompany you to your appointment and drive you home once the procedure is done.
Most people recover quickly, but having someone around for the first day can make things easier. A bit of help with meals, medication or simply having company while you rest can go a long way in making your recovery more comfortable.
Preparing With Confidence
Getting ready for a colonoscopy can feel daunting, but proper preparation can help ensure both diagnostic accuracy and patient comfort. By following your doctor’s instructions, adjusting your diet ahead of time and completing the bowel cleanse as directed, you’ll help ensure a smooth procedure and reliable results.
For tailored guidance and patient-centred care, reach out to our colorectal clinic. Our dedicated colorectal specialist, Dr Chew Min Hoe, can address your specific concerns about preparation requirements and help you feel comfortable and confident every step of the way.
