Bowel Prep Instructions for a Colonoscopy Procedure  

None of these products are prescription

Shopping List

• Miralax powder (238 grams)

• Magnesium Citrate (1-10 oz bottle, not red)

• Gatorade 64 oz bottle (2 liter)
  (not red or purple)

Diabetic patients may use Propel, instead of Gatorade.

Please arrive 30 minutes prior to your appointment time.

If your procedure is scheduled at the hospital please arrive 1 hour prior to the procedure.

Magnesium Citrate, Miralax and Gatorade Prep 

All of the above listed products are available over the counter.  They do not require a prescription.  These products are taken orally.  They are not enemas. These can be obtained at Walmart, drug stores and some grocery stores.

• The day before your procedure, you are on a clear liquid diet ONLY.

Things you may not have are:

Do not eat or drink anything red or purple in color (no red or purple jello, sports drinks, popsicles or red wine) (red or purple products could be mis-interpreted as blood in the colon) Do not use red or purple Gatorade.

No milk or creamer products

Things you may have are:

Clear broth, apple juice, white grape juice, colas, coffee, tea, jello, popsicles, water or any other clear liquid that is not red or purple in color.

Alcohol (not encouraged but allowed except for red drinks)

Take all your medications the day before your procedure (except for blood thinners).

For AM Procedures

• ONLY Clear Liquids all day on the day before the procedure.

• Mix the 238grams of Miralax powder with 64 oz of Gatorade (not red or purple).  Refrigerate.

• The evening prior to the procedure, between 4:00 – 6:00 pm drink the bottle of Magnesium Citrate.

• At 6:00 pm drink one 8oz. glass of the Miralax/Gatorade mix.  Repeat every 15 minutes until you have finished the 2 liter/64 oz Miralax/Gatorade mix (this should take approximately 2 hours).

• You may have clear liquids up until 4 hours prior to your procedure.

• If you take heart, blood pressure, or seizure medication routinely – it is okay to take this medication early the morning of your procedure.

• Please arrive on time

• You must have someone with you to drive you home since you will be receiving sedation.

• You may continue to have clear liquids up until 4 hrs prior to the procedure to help you remain hydrated. Stop drinking liquids of any kind 4 hours before the procedure.

For PM Procedures

• ONLY Clear Liquids after 7:00pm on the day before the procedure.

• Mix the 238 grams of Miralax powder with 64oz of Gatorade (not red or purple) Refrigerate.

• At 7:00 am the morning of the procedure drink the bottle of Magnesium Citrate.

• At 9:00 am drink one 8oz. glass of Miralax/Gatorade mix. Repeat every 15 minutes until you have finished the 2 liter/64 oz. Miralax/Gatorade mix (this should take approximately 2 hours).

• You may have clear liquids up until 2 hours prior to your procedure.

• If you take heart, blood pressure, or seizure medication routinely – it is okay to take this medication early the morning of your procedure.

• Please arrive on time

• You must have someone with you to drive you home since you will be receiving sedation

• You may continue to have clear liquids up until 4 hrs prior to the procedure to help you remain hydrated. Stop drinking liquids of any kind 4 hours before the procedure.

TIPS from previous patients:

• Mix up the solution in the morning to allow it to chill prior to drinking in the evening.

• Drink the solution through a straw.

• Stay very close to a bathroom after taking the prep.

• Drink as many clear fluids as possible during the day – hydrating your body will help reduce side effects such as cramping and nausea. 

A word about bowel preps:

• No bowel prep is fun.

• We have never gotten compliments on the bowel prep.

• The purpose of bowel prep is to clean out the colon to allow clear visualization for the exam.

• A bowel prep is the only way to effectively clean out the bowel (if there was another way, we would use it).

• It is a short term discomfort for a long term cause.

• Respond immediately to the urge.

• Your bowel movements may be frequent, explosive and liquid (this is to be expected).

• Use soft toilet paper and Desitin or A&D ointment for skin irritation.

We no longer routinely use Fleets Phosphosoda in this practice in the event that a patient may have an undiagnosed kidney or heart disease/condition.

• Note: If your insurance requires a pre-authorization, please keep in mind that obtaining this authorization does not guarantee payment.  Contact your insurance for more information prior to your procedure.

Your Doctor may obtain biopsy specimens or order lab work as part of your care.  It is the patient’s responsibility to direct us where to send these.  You may obtain this information from your insurance company prior to your visit.  It is important that you understand that you are financially responsible for lab/pathology charges.

When you check in for your procedure you will be asked where you would like your pathology sent.

Please send my lab/pathology to:

St Mary’s Hospital & Medical Center

Community Hospital

We cannot be responsible for information regarding your insurance coverage. 

Please call your insurance company directly.

Click Here to Print these Prep instructions.

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