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Southern Arizona VA Health Care System

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Colonoscopy GoLYTELY Instructions

What is a Colonoscopy?

A colonoscopy is a test that lets the doctor view the inside of your lower digestive tract. It can help screen for colon cancers and can also help find the source of abdominal pain, bleeding or changes in bowel habits. Cancer of the colon and rectum is the second most common cause of cancer death in the United States. Screening for this cancer can prevent many of these cancer deaths.


If you take blood thinners such as: Coumadin (warfarin), Plavix (clopidigrel) Pradaxa (dabigatran), Xarelto(rivaroxaban) Eliquis (apixiban), Effient (prasugrel) Brilinta (ticagrelor) Cilostazol (pletal), you must speak to your doctor who prescribes the medication for you. This may be your primary doctor, anticoagulation clinic or cardiologist. They will tell you the number of days to hold the blood thinner before your procedure.


  • Remember your sugars will come from clear liquids while you prep for your colonoscopy..
  • While on clear liquids watch for symptoms of low blood sugar or monitor your blood sugar every 6 hours.
  • Insulin: Take ½ of your usual insulin dose the day(s) you drink your prep.
  • DO NOT take any insulin or diabetes pills on the day of the procedure.
  • Speak with your provider for questions about your diabetes.

Five Days Before                                   

Do NOT take iron, vitamins, fiber supplements, aspirin (325 milligrams), or NSAIDS such as: Motrin (ibuprofen), Naproxen, Meloxicam, Advil and Aleve.

Two Days Before       

Start clear liquid diet at 10:00 p.m.

No solid food of any kind.

You may consume:

  • Clear bouillon or broth
  • Tea or Black coffee
  • Gatorade, Crystal Light, Kool-Aid (NO RED)
  • Apple juice, white grape juice, and/ or white cranberry juice
  • Plain jello or popsicles (NO RED)

You may NOT consume:

  • No milk products
  • No alcohol

The Day Before         

  • Stay on clear liquid diet.
  • 9:00 a.m: mix GoLYTELY according to bottle instructions. Refrigerate.
  • Noon: take all 4 Dulcolax (bisacodyl) pills with a full glass of water.
  • 2:00 - 4:00 p.m: Drink half of the bottle (2 liters) of GoLYTELY.
  • 4:00 - 5:00 p.m: REST and do not drink anything.
  • 5:00 - 7:00p.m: Drink remainder (additional 2 liters) of GoLYTELY until it is gone.

Note: Stay on clear liquids after drinking prep. No solid foods.

Day of Procedure                                   

  • Take your blood pressure, seizure, and pain medication at least two hours prior to your procedure.
  • Two hours before your appointment do not drink anything. Stop clear liquids at           
  • Please arrive on time for your appointment at the Special Procedures Unit, Building 50, 3rd floor.

Note: Female patients under the age of 55 will be required to provide a urine specimen upon arrival.

  • You will be sedated for the colonoscopy.
  • Bring a responsible adult (over 18 years old) to your appointment. We will ask them to wait in the lobby and after the procedure, take

you home.

  • Please note: If you arrive without a responsible adult, even if you complete the prep, your procedure

may need to be rescheduled, or you may need to spend the night in the hospital. Please call your Patient Aligned Care Team (PACT) to discuss options in advance if you do not have someone to come

with you.

After your Procedure

  • No driving, important decision making or alcohol for 24 hours.
  • Rest for the remainder of the day.
  • If tissue is removed, a letter with biopsy results will be mailed within 2 weeks.


  • The prep (powder and pills) will be mailed to your home.


  • Drink more water than normal the day before the procedure.
  • Mix the prep powder early and refrigerate it before you need to begin drinking.
  • Drink the prep through a straw.