Colonoscopy Preparation - Split Dose Bowel Prep

Morning Colonoscopy


1.                  Do not eat nuts, corn, popcorn, seeds, or foods containing seeds (Examples: cucumbers, tomatoes, rye bread, watermelon, squash)

2.                  Please review diets and frequently asked questions at our website

3.                  Purchase the following (all are over the counter) at a pharmacy or grocery store

    1. Two 64 oz. bottles of Gatorade (any flavor or color, see alternatives for diabetics)
    2. Two 8.3 oz. bottles of MiraLax powder (238 grams/14 dose)
    3. One 30 ml bottle of Simethicone infant gas relief drops (20mg/0.3ml) (any brand)



  1. Begin a clear liquid diet in the morning (no solid food, milk, or dairy products). You may consume water, black tea, or coffee (no milk or creamer), broth or bouillon soup, clear juices such as apple, white grape or white cranberry, fruit-flavored drinks such as Crystal Light, Italian ices, Jell-O, popsicles, carbonated beverages, sports drinks such as Gatorade, Powerade, or Propel. Drink lots of fluids to prevent dehydration.
  2. Mix 8.3 oz. of MiraLax with 64 oz. of Gatorade. Fill the Simethicone gas drops to the 0.6 ml line and add to the mixture. Repeat with another 0.6 ml dropper of Simethicone. Mix another 8.3 oz. of MiraLax with 64 oz. of Gatorade. Fill the Simethicone gas drops to the 0.6 ml line and add to the mixture. Repeat with another 0.6 ml dropper of Simethicone. You will have one gallon total of the MiraLax mixture to drink in preparation for your procedure. Mix well and place in the refrigerator.

3.      Take your blood pressure and heart medications as you normally do.

  1. At 6:00 pm the evening before your procedure, drink 8 oz. of the preparation every 15 minutes until the entire 64 oz. is gone. If you become nauseated, stop drinking, wait 30 minutes, and then continue. Finish the first 64 oz. within two hours or by 8:00 pm.
  1. At 10:00 pm, drink an 8 oz. glass of the preparation every 15 minutes until the entire 64 oz. is gone. You need to finish the mixture within two hours or by 12:00 midnight.



  1. Do not drink any liquids for four hours before your ARRIVAL time or your procedure may be rescheduled or delayed. Do not eat any candy or chew gum.
  2. Take your blood pressure and heart medications with a small sip of water. Diabetics - Do NOT take your insulin or diabetic pills the day of the procedure.
  3. Do not smoke or vape on the day of your colonoscopy.
  4. You must have a responsible adult known to you to drive you home. This cannot be a taxi, Uber, or bus unless there is a known responsible adult to accompany you.


You must arrive 60 minutes prior to your procedure time for pre-op paperwork and assessment.


Please see the Pre-Procedure Instructions and What to Expect from your Colonoscopy instructions for important information regarding your procedure. Sign up or access the Patient Portal for results of procedures, check appointment times, and communicate with your care team.

Please see the FAQs for answers to the most commonly asked questions regarding your instructions. 

Colonoscopy Insurance Benefits Information

There are two types of colonoscopies:

1.       Diagnostic (also known as medical)

2.       Screening (also known as preventative or routine) (Screenings are also classified as average or high risk)


                A diagnostic colonoscopy is performed for a patient with symptoms. (Examples: constipation, diarrhea, weight loss, abdominal pain, rectal bleeding, anemia, history of colon polyps or cancer)


                Average risk screening – A patient that is at least 50 years old and has no past or current bowel symptoms and no risk factors.

                High risk or surveillance screening – A patient with risk factors or personal history of colon polyps and/or colon cancer, a family history of colon polyps and/or colon cancer and certain inflammatory bowel diseases. The age of the patient would not apply. Due to your risk factor, your physician will recommend you have these more frequently.

How does my insurance cover my colonoscopy?

A diagnostic or medical colonoscopy is generally subject to one’s major medical benefits, deductibles, co-insurance and/or co-pays). These are performed as an outpatient procedure so checking your benefits for “outpatient surgery” will give you a better idea of what type of out-of-pocket expenses you may incur.

An average risk screening is generally covered by one’s wellness benefits. Most (not all) insurance companies will cover this at 100%, once every ten years and the patient must be over the age of 50. However, if during your screening colonoscopy a diagnosis is made, an additional procedure is performed and/or biopsy or specimen is collected, you may be responsible for out of-pocket costs as a “diagnostic/medical colonoscopy”.

A high risk or surveillance screening coverage is specific to your insurance company. Some insurance companies will cover these under wellness benefits and some will cover these under major medical benefits. Insurance companies DO NOT have to cover these at 100%.

**This is only a general guideline of insurance coverage for your colonoscopy benefits. Each insurance company will vary their coverage and costs.