Tests & Procedures

At Minnesota Gastroenterology, we know that patients and families want to know as much as possible about the test and/or procedure that is being recommended by a healthcare provider.  Refer to the list below to find the information that is most helpful to you.  If you still have questions, please contact us through our website Quick Links or call (612) 871-1145 to make an office appointment.



Purchase the following supplies at your local pharmacy:

2 – Bisacodyl tablets
(Dulcolax® laxative NOT Dulcolax® stool softener) each tablet contains 5 mg of bisacodyl

1 - 8.3 ounce bottle of Polyethylene Glycol (PEG) 3350 Powder
(MiraLAX, SmoothLAX, ClearLAX or generic equivalent)

64 oz. Gatorade® (No red colored flavors)
Regular Gatorade®, Gatorade G2®, Powerade®, Powerade Zero® or Pedialyte are acceptable. Red flavors are not allowed; all other colors (yellow, green, orange, purple, blue) are okay. It is also okay to buy two 2.12 oz packets of powdered Gatorade that can be mixed with water to a total volume of 64 oz of liquid.

1 - 10 oz. bottle Magnesium Citrate (No red colored flavors)
It is also okay for you to use a 0.5 ounce package of powdered magnesium citrate (17 grams) mixed with 10 ounces of water.

Cancel or reschedule your appointment:
If you must cancel or reschedule your appointment, please call 612-871-1145 as soon as possible.

You must arrange for a ride for the day of your procedure with a responsible adult. A taxi ride is not an option unless you are accompanied by a responsible adult. If you fail to arrange transportation with a responsible adult, your procedure will be cancelled and rescheduled.

7 days before:

  • Discontinue fiber supplements and medications containing iron. This includes multivitamins with iron, Metamucil and Fibercon.
  • Confirm a driver for your procedure

3 days before:

  • Begin a Low-Fiber Diet. A low fiber diet helps make the cleanout more effective.
    • Examples of a low fiber diet include (but are not limited to): White bread, white rice, pasta, crackers, fish, chicken, eggs, ground beef, creamy peanut butter, cooked/steamed/boiled vegetables, canned fruit, bananas, melons, milk, plain yogurt cheese, salad dressing and other condiments.
    • The following are not allowed on a low fiber diet: Seeds, nuts, popcorn, bran, whole wheat, corn, quinoa, raw fruits and vegetables, berries and dried fruit, beans and lentils.
  • For additional details on following a low fiber diet, please see www.mngastro.com/lowfiber

2 days before:

  • Continue Low Fiber Diet.
  • Drink at least 8 glasses of water throughout the day.
  • Stop eating solid foods at 11:45 pm.

1 day before:

  • Begin Clear Liquid Diet. (Clear liquids include things you can see through).
    • Examples of a clear liquid diet include: Water, black coffee or tea (no milk or non-dairy creamer), clear broth or bouillon, Gatorade, Pedialyte or Powerade, carbonated and non-carbonated soft drinks(Sprite, 7-Up, Gingerale), strained fruit juices without pulp (apple, white grape, white cranberry), Jello-O and popsicles
    • The following are not allowed on a clear liquid diet: Red liquids, alcoholic beverages, dairy products, protein shakes, cream broths, juice with pulp and chewing tobacco.
  • At noon: Take 2 Bisacodyl (Dulcolax) tablets
  • Between 4-6pm: Drink Miralax – Gatorade preparation

Mix 1 bottle of Miralax with 64 oz. of Gatorade in a large pitcher.
Drink 1 - 8 oz. glass of the Miralax/Gatorade solution.
Continue drinking 1 - 8 oz. glass every 15 minutes thereafter until the mixture is gone.

Colon Cleansing Tips: Drink adequate amounts of fluid before and after your colon cleansing to prevent dehydration. Stay near a toilet because you will have diarrhea. Even if you are sitting on the toilet, continue to drink the cleansing solution every 15 minutes. If you feel nauseous or vomit, rinse your mouth with water, take a 15 to 30-minute break and then continue drinking the solution. You will be uncomfortable until the stool has flushed from your colon (in about 2-4 hours). You may feel chilled.

Day of your procedure
You may take all of your morning medications including blood pressure medications, blood thinners (if you have not been instructed to stop these by our office), methadone, anti-seizure medications with sips of water 3 hours prior to your procedure or earlier. Do not take insulin or vitamins prior to your procedure.

Continue the Clear Liquid Diet. Avoid red liquids, alcoholic beverages, dairy products, protein shakes, and chewing tobacco.

  • 4 hours prior: Drink 10 oz magnesium citrate
  • 3 hours prior: 
    • STOP consuming all liquids
    • Do not take anything by mouth during this time.
    • Allow extra time to travel to your procedure as you may need to stop and use a restroom along the way.

You are ready for the procedure, if you followed all instructions and your stool is no longer formed, but clear or yellow liquid. If you are unsure whether your colon is clean, please call our office at 612-871-1145 before you leave for your appointment.

Cancel or Reschedule your appointment:
If you must cancel or reschedule your appointment, please call 612-871-1145 as soon as possible.

Bring the following to your procedure:

  • Bring the completed Health History form included in this packet with you the day of your appointment.
  • Insurance Card / Photo ID
  • List of Current Medications including over-the-counter medications and supplements
  • Bring your rescue inhaler if you currently use one to control asthma
  • Bring contact lenses supplies as you will be asked to remove contact lenses prior to the start of your procedure
  • Advance Directives: If you have an Advance Directive, please bring a copy of your Advance Directive with you to your endoscopy appointment. Advance Directives are not honored at MNGI facilities, and in the event of a life-threatening situation, life support measures will be instituted in every instance and our patients will be transported to a higher level of care facility (i.e., hospital). In the unlikely event that you require an emergency transfer to a higher level of care facility, your Advance Directive should accompany you to that facility.