Miralax Colonoscopy – Preparation, Instructions, and What to Expect
A colonoscopy is one of the most important procedures for detecting colon cancer, polyps, and other gastrointestinal conditions. For a successful colonoscopy, a clean colon is essential, and that means proper bowel preparation. One widely recommended prep method is the Miralax Colonoscopy prep, known for being gentle, effective, and easier to tolerate than some traditional options.
What Is Miralax?
Miralax is an over-the-counter laxative containing polyethylene glycol 3350. It works by drawing water into the colon to soften and loosen stool, making it easier to pass. When combined with a clear liquid diet and an electrolyte-rich drink (like Gatorade), it becomes an effective colon-cleansing solution for colonoscopy preparation.
Why Doctors Recommend Miralax Colonoscopy Prep
A clean colon is critical for your gastroenterologist to see and detect abnormalities clearly during the procedure. The Miralax Colonoscopy method is often chosen because it:
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Has a mild taste (when mixed with clear liquids)
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Causes less cramping than harsher laxatives
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Is generally well tolerated by most patients
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Allows split dosing for more comfort and effectiveness
Typical Miralax Colonoscopy Instructions
While exact instructions may vary by doctor, a common regimen includes:
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Diet Changes 1–3 Days Before
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Switch to a low-fiber diet (no seeds, nuts, whole grains, or raw vegetables).
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The day before, follow a clear liquid diet—broth, tea, coffee (no milk), clear juices, sports drinks, and gelatin.
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The Evening Before Your Colonoscopy
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Mix the entire bottle of Miralax (238g) into 64 ounces of clear liquid (often Gatorade).
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Drink half of the solution over 1–2 hours.
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The Morning of the Procedure
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Drink the remaining half of the solution 5–6 hours before your appointment.
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Stop all clear liquids 2–4 hours before the colonoscopy (per your doctor’s instructions).
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Tips for a Smooth Miralax Colonoscopy Prep
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Chill the mixture to improve taste.
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Drink it in smaller sips rather than large gulps.
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Use a straw to minimize contact with taste buds.
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Apply petroleum jelly or diaper cream to prevent anal irritation from frequent bowel movements.
What to Expect During the Colonoscopy
On the day of your procedure:
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You will receive sedation to keep you comfortable.
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Your doctor will use a thin, flexible scope with a camera to inspect your colon.
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Polyps or abnormal tissue may be removed during the procedure.
Most patients recover quickly and can return to normal activities the next day.
Possible Side Effects of Miralax Prep
While generally safe, you may experience:
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Temporary bloating
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Nausea
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Mild abdominal cramps
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Increased bowel movement frequency until the prep is complete
If you have kidney disease, heart conditions, or certain metabolic disorders, always inform your doctor before using any bowel prep.
