Patient information

Before Your Procedure: What You Need to Know

Bowel Preparation – Why It’s Crucial for a Successful Colonoscopy

Proper bowel preparation is one of the most important steps for a successful colonoscopy. A clean colon allows me to get a clear, unobstructed view, ensuring accurate detection of any abnormalities, such as polyps or inflammation.

Why Is Bowel Preparation So Important?

Think of it like driving a car on a sunny, clear day versus driving in thick fog.

  • When your bowel is properly cleaned, i can see everything clearly, just like driving in perfect weather.
  • If the bowel is not well prepared, it’s like driving in foggy conditions—polyps and other issues may be missed, leading to an inconclusive test or the need for a repeat procedure.

How to Prepare for a Colonoscopy?

✅ Follow the dietary instructions – Usually, a clear liquid diet is required the day before.
✅ Take the prescribed bowel prep solution – This helps flush out the intestines.
✅ Drink plenty of fluids – Stay hydrated to avoid dehydration.
✅ Follow the timing carefully – Taking the preparation at the right time ensures the colon is clean during the procedure.

What Happens If the Bowel Is Not Clean?

❌ The doctor may not be able to see polyps or abnormalities clearly.
❌ The procedure may take longer or need to be repeated.
❌ Incomplete results could delay diagnosis and treatment.

👉 Following the bowel preparation instructions carefully ensures the best possible outcome and an accurate diagnosis!

Colonoscopy Preparation Diet Instructions

Proper dietary preparation is essential for a successful colonoscopy. Following these guidelines will help ensure a clear bowel, allowing for an accurate and effective procedure.

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Following the bowel preparation instructions carefully ensures the best possible outcome and an accurate diagnosis!

Colonoscopy Preparation Diet Instructions
Proper dietary preparation is essential for a successful colonoscopy. Following these guidelines will help ensure a clear bowel, allowing for an accurate and effective procedure.
Foods to AVOID Before Your Colonoscopy (5 Days Before)
❌ Nuts, seeds, and grains—these can block the camera’s suction and make the procedure
difficult.
❌ Leafy greens and fibrous vegetables (foliage)—hard to digest and difficult to clear from
the bowels.
❌ Fruits with seeds or skin—avoid berries, grapes, tomatoes, cucumbers, etc.
❌ Red or purple-colored foods and drinks can stain the colon and interfere with visibility.
❌Whole grains and high-fiber cereals take longer to digest and leave residue.

Recommended Diet Before Your Colonoscopy

3-5 Days Before the Procedure (Low-Fiber Diet)
✅ White bread, white rice, or pasta (Avoid whole grains)
✅ Lean proteins—chicken, fish, eggs (Avoid fatty meats)
✅ Dairy products—milk, yogurt, cheese (If tolerated)
✅ Well-cooked, skinless vegetables—avoid fibrous or leafy greens
✅ Peeled fruits—apples, bananas, melons (Avoid skins and seeds)

The Day Before the Colonoscopy (Clear Liquid Diet Only)
✅Water— Stay well-hydrated.
✅ Clear broths (chicken, beef, or vegetable)—no solid pieces.
✅Plain tea or coffee (no milk or creamer).
✅ Apple juice, white grape juice, or sports drinks (no red, purple, or dark colors).
✅ Clear gelatin (No red or purple colors).
✅ Ice pops (No fruit pieces or red/purple dyes).

�� No solid food, dairy, alcohol, or cloudy liquids.

The Day of the Colonoscopy
⏳ Stop all liquids at least 4 hours before your procedure.
⚠️ Take the prescribed bowel prep as instructed to fully cleanse your colon.
Following these dietary instructions will help ensure a clear colon and a successful
procedure.

❌ Stop Before the Procedure (Unless Instructed Otherwise)

  • Iron tablets – Stop 5–7 days before. They can darken the colon and make the exam harder.
  • Fiber supplements – Stop 3–5 days before (e.g. Metamucil, psyllium).
  • Herbal or natural supplements – Stop 5 days before; they may affect bleeding or prep.
  • Constipating medications – Stop 3–5 days before, unless advised otherwise. These include:
    • Codeine or other opioid painkillers
    • Loperamide (Imodium) or similar anti-diarrhoeals
    • Some antacids that contain aluminum or calcium
    • Medications that slow the bowel (ask if unsure)

These medications can make bowel prep less effective and leave residue in the colon.

⚠️ Blood Thinners

If you take:

  • Warfarin
  • Clopidogrel (Plavix)
  • Ticagrelor
  • Apixaban (Eliquis)
  • Rivaroxaban (Xarelto)
  • Aspirin

Do not stop these unless I advise you to.

For most diagnostic procedures and small polyp removal, I usually continue blood thinners, as the risk of bleeding is lower than the risk of stroke or heart complications.

💊 Blood Pressure Medications

If you take medication for high blood pressure, follow these instructions on the morning of your colonoscopy:

  • ✅ Take as usual (with a small sip of water):
    • Beta-blockers (e.g. metoprolol, atenolol, bisoprolol)
    • Calcium channel blockers (e.g. amlodipine, diltiazem)
  • ❌ Do not take on the morning of the procedure:
    • ACE inhibitors (e.g. lisinopril, ramipril)
    • ARBs (e.g. losartan, valsartan)
    • Diuretics or “water tablets” (e.g. hydrochlorothiazide, furosemide)

These may lower your blood pressure too much during sedation. You can restart them after the procedure once you’re drinking fluids.

💉 Insulin Adjustments for Colonoscopy

📅 The Day Before Your Colonoscopy

You’ll be on a clear liquid diet. Please adjust your insulin as follows:

Short-acting insulin (e.g. Novorapid, Humalog):

  • Skip your lunch and dinner doses if you’re not eating solid food.
  • Monitor your blood sugar throughout the day.
  • Drink sweetened clear fluids (like lemonade or apple juice) if your sugar drops or you feel shaky.

Long-acting insulin (e.g. Lantus, Levemir, Toujeo, Tresiba):

  • Take 75% of your usual evening dose.

Example: If you usually take 20 units, take 15 units.

📅 The Morning of Your Colonoscopy

You’ll be fasting—no food or drink.

  • ❌ Do not take short-acting insulin.
  • ✅ Take 50–75% of your usual long-acting insulin dose, unless instructed otherwise.

Example: If you normally take 20 units, take 10–15 units.

  • Bring all your insulin and diabetes medications with you.
  • Monitor your blood sugar before leaving home.
  • Tell clinic staff immediately if you feel dizzy, weak, or unwell.

💊 Ozempic (Semaglutide) and Similar Medications

If you are taking Ozempic, Trulicity, Rybelsus, Wegovy, or other GLP‑1 medications, please follow these instructions:

  • You do not need to stop your medication before your colonoscopy unless advised otherwise.
  • You must fast for at least:
    • 12 hours from solid food
    • 6 hours from any liquids (including clear fluids)

These medications slow your stomach emptying. Longer fasting reduces the risk of vomiting or aspiration during sedation.

📞 Still not sure?
Every patient is different. If you have questions, please contact us—we’re here to help.

🧪 Understanding Bowel Preparation Solutionshttps://junaidbgastro.com/wp-content/uploads/2025/07/Bowel-Preparation-Instructions.pdf

Before your colonoscopy, you’ll need to take a bowel preparation (bowel prep) to clean out your bowels. This helps your doctor see clearly and perform a safe and accurate test.

✅ Two Main Types of Bowel Prep

There are two main types of bowel prep solutions:

1️⃣ Low-volume preps (like PicoPrep)

  • You drink less fluid, but they pull water and salts (electrolytes) into your bowel.
  • These can cause shifts in your body’s fluid and salt balance, so they’re not suitable for everyone.
  • Often easier to drink, but not recommended if you have kidney or heart problems.

2️⃣ High-volume preps (like ColonLYTELY)

  • You drink more fluid, but they are gentler on your body and don’t shift water or electrolytes.
  • These are safer for people with kidney or heart conditions.
  • May be harder to finish due to the volume, but they work very well.

💊 Which One Will I Take?

In our clinic, we commonly use:
✅ PicoPrep — for people who are otherwise healthy
✅ ColonLYTELY — for people with kidney disease, heart failure, or at risk of dehydration

There are also other bowel prep brands available in Australia.

💬 Please speak to your pharmacist or doctor before using any other type of bowel prep — especially if you have other health conditions.

🕑 Bowel Prep Schedule – Morning vs Afternoon Appointments

✅ For Morning Appointments

(Procedure between 7:30 AM – 11:30 AM)

Evening Before:

  • 6:00 PM – Drink 2 litres of ColonLYTELY (or first dose of PicoPrep) over 2 hours
  • Drink extra clear fluids afterward (at least 1–2 glasses)

Early Morning (on the day of procedure):

  • Around 4:00–5:00 AM – Drink 1 litre of ColonLYTELY (or second dose of PicoPrep)
  • Finish at least 2 hours before your arrival time
  • You may sip clear fluids until your fasting cut-off time

✅ For Afternoon Appointments

(Procedure between 12:00 PM – 4:00 PM)

Evening Before:

  • 6:00–7:00 PM – Drink 1 litre of ColonLYTELY (or first dose of PicoPrep)
  • Drink extra clear fluids afterward

Morning of the Procedure:

  • 7:00–8:00 AM – Drink 2 litres of ColonLYTELY (or second and third dose of PicoPrep)
  • Finish drinking at least 2 hours before your appointment time
  • Continue clear fluids until the fasting cut-off

🔄 Extended Bowel Preparation for Afternoon Colonoscopy

For patients with constipation or on constipating medications, slow bowels or previous incomplete bowel prep

This plan uses:

  • A 5-day low-residue diet
  • Two doses of bisacodyl (10 mg)
  • A 4-litre PEG solution (ColonLYTELY or GlycoPrep-C) taken as a split dose

This method is best suited for afternoon procedures, allowing you time to complete the full preparation effectively

✅ If Your Colonoscopy Is in the Afternoon

This is the preferred timing for extended prep.

What to Do:

  1. Follow your extended bowel prep schedule exactly (see your prep sheet).
    2. On the day before your procedure:
    • Take bisacodyl as directed
    • Drink 2 litres of prep solution in the evening (around 6:00–8:00 PM)
    3. On the morning of your procedure:
    • Drink the remaining 2 litres of the prep
    • Start around 7:00–8:00 AM
    • Finish by 10:00 AM if your procedure is at 1:00 PM or later
    4. Stop all drinks 2 hours before your appointment

❗ If Your Colonoscopy Is in the Morning

You will still do a split-dose, but your second dose must be taken very early in the morning.

What to Do:

  1. The day before your procedure:
    • Take bisacodyl as directed
    • Drink 2 litres of prep solution in the evening (around 6:00–8:00 PM)
  2. On the morning of your procedure:
    • Start your second 2 litres of prep 4–6 hours before your arrival time
    • Finish drinking the prep at least 2 hours before your arrival

Example Timing:

Procedure Time

Start Drinking At

Finish By

7:30 AM

4:00 AM

5:30 AM

8:00 AM

4:30 AM

6:00 AM

9:00 AM

5:00 AM

7:00 AM

📝 Clear Fluids You Can Drink

✅ Water
✅ Clear apple juice
✅ Clear broth (no solids)
✅ Lemonade or sports drinks (not red or purple)
✅ Tea or black coffee (no milk)

👀 How Do You Know It’s Working?

By the end of the prep, your bowel movements should look like:
✅ Clear or light-yellow liquid
❌ No solid bits

⚠️ Important Reminders

  • Stay close to a toilet — prep works fast
  • Don’t eat solid food after your prep starts
  • Do not eat or drink anything after the time your doctor or nurse has advised
  • Call your clinic if you’re unable to complete the prep or still passing solid stool in the morning

🕓 Extended Bowel Preparation

This is used when bowel cleansing needs to begin earlier — such as in:

  • Patients with chronic constipation
  • History of inadequate prep in the past
  • Very slow gut motility
  • Older adults or those on constipating medications

📝 How to Do It:

  • Start 2–3 days before the procedure
    ➤ Begin a low-fiber or low-residue diet
    ➤ Use a stimulant laxative (if advised) the day before prep begins
  • Then follow with a split-dose regimen (as above), using ColonLYTELY or PicoPrep as directed.

🟡 This method allows time to “loosen up” the bowel before the main cleansing begins

😖 Tips to Make It Easier to Drink (Palatability Tips)

✅ Chill it—Keep the prep in the fridge before drinking. Cold helps with taste.
✅ Use a straw—sip it through a straw placed at the back of the mouth to reduce taste.
✅ Flavor help (if allowed by your doctor):

  • Suck on a lemon slice between sips
  • Rinse your mouth with water or mint tea after drinking
    ✅ Take small sips often—break it into manageable amounts and follow the timing instructions carefully.
    ✅ Drink clear fluids between doses—helps rinse your mouth and stay hydrated (avoid red or purple liquids).
    ✅ Stay near a toilet – The solution works quickly and will cause frequent bowel movements.

⚠️ Final Reminders

  • Finish all of the prep unless told otherwise
  • Don’t mix it with sugary drinks, milk, or fizzy drinks
  • Follow your exact instructions for timing and fasting
  • Contact your doctor if you vomit, feel very unwell, or can’t complete the pre
  1. Do not eat or drink anything after the finish time (except small sips of water for medications if advised).

👀 How Do I Know If My Bowel Is Clean Enough?

During your bowel prep, your stool will gradually change from solid to liquid. You are ready for your colonoscopy only when you are passing clear fluid that looks like what you’re drinking—either colorless or with a slight yellow tint.

Here’s a guide to help you know:

❌ Not Ready Yet

What you see:
💩 Brown stool, thick or solid pieces

What it means:
Your bowel is still full — keep going with the prep

⚠️ Almost There

What you see:
🟤 Cloudy brown or yellow liquid with small bits

What it means:
Better — but you’re not fully clean yet
Keep drinking the prep and fluids as instructed

✅ You’re Ready!

What you see:
💧 Clear, pale-yellow liquid — like urine, tea, or lemonade
NO solid bits or dark pieces

What it means:
✅ Your bowel is clean
✅ You’re ready for your colonoscopy
✅ No need to take more prep unless told by your doctor

🤢 What to Do If You Feel Nausea or Vomit During Bowel Prep

It’s not uncommon to feel a bit nauseated while drinking bowel prep, especially if it’s consumed too quickly or the taste is unpleasant.

✅ If You Feel Nauseous:

  • Pause for 15–30 minutes. Let your stomach settle.
  • Take small sips instead of big gulps.
  • Try chilling the prep more or drinking through a straw.
  • Rinse your mouth with cold water, peppermint tea, or suck on ice chips.
  • Try walking around gently — this can help ease bloating and nausea.

🚨 If You Vomit:

  • Wait at least 30–60 minutes before trying again.
  • Resume at a slower pace — small sips every few minutes.
  • Drink clear fluids (like water or clear lemonade) during the break to stay hydrated.
  • If vomiting continues or you can’t keep the prep down:
    • Call your clinic as your bowel may not be clean enough for the procedure.
    • You may need an alternative plan.

📞 Call the Clinic If:

  • You’re still passing solid stool the morning of your test
  • You feel unwell or can’t finish the prep
  • You’re unsure whether you’re ready

 

✅ What Are Functional Bowel Disorders?

Functional bowel disorders are common long-term problems with how your gut works. They cause tummy pain, bloating, and changes in your bathroom habits — but nothing shows up on scans or tests. The gut isn’t damaged, but it isn’t working quite right.

✅ Types of Functional Bowel Disorders

  • Irritable Bowel Syndrome (IBS) – Tummy pain, bloating, and diarrhea or constipation (or both).
  • Functional Dyspepsia – Upper stomach pain, feeling full quickly, nausea.
  • Functional Constipation – Hard, slow, or painful bowel movements.
  • Functional Diarrhea – Frequent loose stools with no clear cause.
  • Bloating and Distension – Feeling swollen or full in the belly, often with gas.

❓ How Do These Problems Happen?

Functional bowel disorders can start after certain triggers, such as:

✅ A gut infection – like food poisoning or a stomach bug
✅ A surgery – especially in the belly or pelvis
✅ Antibiotics – which may upset the balance of good gut bacteria
✅ Stress or trauma – emotional events can affect gut function

➡️ Sometimes, there’s no clear trigger, and symptoms build up slowly over time.

🧪 How Are They Diagnosed?

Functional bowel disorders are a diagnosis of exclusion.

This means your doctor will:

  • Rule out other causes like infections, inflammation, or serious conditions
  • Ask detailed questions about your symptoms and medical history
  • Order tests such as blood work, stool tests, scans, or endoscopy if needed

If no clear disease is found and your symptoms match a functional pattern, an FBD may be diagnosed.

🧠 It’s not “in your head” — the gut is reacting differently even though tests look normal.

🔍 Why Does It Happen? (The Causes)

  • Gut-brain miscommunication – The brain and gut don’t work in sync
  • Changes in gut movement – Things move too fast (diarrhea) or too slow (constipation)
  • Sensitive gut nerves – More pain or bloating from normal signals
  • Imbalance in gut bacteria – Too few “good” bacteria
  • Stress & anxiety – Can worsen gut symptoms
  • Trigger foods – Like dairy, gluten, or high FODMAPs

✅ How Can You Manage It?

There’s no one-size-fits-all solution. Everyone’s symptoms and triggers are different, so treatment needs to be tailored to each person. A mix of approaches is often needed to find what works best for you

🥗 Diet Tips

  • Low-FODMAP Diet – Helps reduce bloating and pain.
  • Increased Fiber Intake – Beneficial for constipation can help with constipation  but should be done gradually.
  • Avoiding Trigger Foods – Processed foods, artificial sweeteners, high-fat meals.
  • 🍽️ Talk to your doctor or dietitian to create a food plan that fits your needs.

💊 Medications

  • There are different medications that can help with gut symptoms like cramping, constipation, or diarrhea — but they are not the same for everyone.
  • 💊 Please don’t self-medicate — book a consultation so we can choose the safest and most effective options for your specific case.

🧘 Mind-Body Approaches

  • Your gut and brain are connected, and stress or anxiety can make gut symptoms worse.
  • Simple strategies that may help include:
    Talking therapy (like CBT)
    • Gut-focused hypnotherapy
    • Relaxation, mindfulness, or gentle yoga
  • 🧠 After we’ve ruled out other causes, we can guide you with the right support and techniques that that suit you. You don’t have to manage it alone.

❤️ The Bottom Line

Functional bowel disorders are long-term and not curable, but the good news is:
🌟 With the right mix of diet, medication, and stress management, many people see real improvement.

Every person is different—work with your healthcare provider to build a plan that works for you