This information will help you prepare for your barium enema at Memorial Sloan Kettering Cancer Center (MSKCC).

A barium enema is an x-ray exam of the colon (large intestine). It is done with barium, air, or both. The barium makes the colon easier to see on an x-ray.

A Few Days Before Your Procedure

You will need to empty your colon before your barium enema. If you're in the hospital before your barium enema, your nurse will give you the bowel preparation. If you will be coming to the hospital for your barium enema, purchase the following supplies a few days ahead of time:

  • Polyethelene glycol (MiraLAX®). You will need 1 bottle containing 238 grams.
  • Gatorade® (a light color, not red or purple). You will need two 32-ounce bottles.
  • Bisacodyl (Dulcolax®) 5 mg tablets. You will need 4 tablets.

The Day Before Your Procedure

You will follow a clear liquid diet the day before your procedure. Be sure to drink plenty of liquids other than water, coffee, and tea. You will need the calories from these liquids so that you don't feel faint.



Do Not Drink


  • Clear broth or bouillon
  • Clear consommé
  • Clear packaged vegetable, chicken, or beef broth-mix
  • Any products with particles of dried food or seasoning


  • Gelatin (such as Jello®)
  • Flavored ices
  • Anything red or purple


  • Clear fruit juices, such as white cranberry, white grape, apple
  • Soda, such as 7-Up®, Sprite®, ginger ale, seltzer, Gatorade®
  • Black coffee (no cream)
  • Tea
  • Juice with pulp
  • Nectars
  • Milk
  • Alcoholic beverages

At 3:00pm, take 2 bisacodyl (Dulcolax®) tablets.

At 5:00 pm:

  •  Divide the MiraLAX® in half. Pour half of the MiraLAX® into each 32-ounce bottle of Gatorade®.
  • Shake until it's fully dissolved.
  • Drink an 8-ounce glass every 30 minutes until both bottles are empty.

At 7:00pm, take the last 2 bisacodyl (Dulcolax®) tablets.

Do not eat or drink anything after midnight the night before your virtual colonoscopy. This includes water, gum, and hard candy.

The Day of Your Procedure

What to bring with you

  • A list of the medications you take at home
  • Medications you take for breathing problems (such as inhalers) and/or medications for chest pain
  • If you have an ostomy, bring an extra bag and supplies with you

Where to park

Parking at MSKCC is available in the garage on East 66th Street between York and First Avenues. To reach the garage, enter East 66th Street from York Avenue. The garage is located about a quarter of a block in from York Avenue, on the right-hand (north) side of the street. There is a pedestrian  tunnel that goes from the garage into the hospital. There are also commercial garages nearby: four on East 69th Street between First and Second Avenues and three on East 65th Street between First and Second Avenues. For questions about prices, call (212) 639-2338.

Where to go

You should arrive at the main building of MSKCC. Enter through the entrance at 425 East 67th Street, and take the A elevator to the 2nd floor.

What to expect

Once you arrive at the hospital, doctors, nurses, and other staff members will ask you to state and spell your name and date of birth many times. This is for your safety. Patients with the same or similar names may be having procedures on the same day.

After changing into a hospital gown, a radiologist will review the procedure with you and answer your questions. You will be helped onto an x-ray table and will lie flat on your back. An x-ray of your abdomen will be taken first to make sure there is no stool (feces) in your colon. The radiologist will put a small tube into your rectum. This will allow the barium to flow gently into your colon; you may feel cramping while is happening. Your radiologist will watch the barium move through your colon on a monitor screen while x-rays are taken at different times.

The head of the table may be tilted higher or lower and you may be helped into different positions during your procedure. This is so the barium will coat your entire colon.

Your radiologist will remove the tube from your rectum and you will be taken to the bathroom to expel the barium and air. Afterwards, 1 or more x-rays will be taken. Once your radiologist has reviewed all of the x-rays, you can leave.

After Your Procedure

You can go back to your usual diet and activities, unless your doctor or nurse tells you something different. Your results will be available from your doctor after 2 days.

Your stool will be white for the next few days as your body gets rid of the barium. Barium can cause constipation, so it's important to drink extra liquids to help move it out of your colon. Some patients need a laxative, such as milk of magnesia, or an enema to remove all of the barium. If your stool has not returned to its normal color a few days after your barium enema, ask your doctor if you should take a laxative.

If you have any questions about your barium enema, call the Department of Radiology at (212) 639-7298 Monday through Friday between 8:00 am and 8:00 pm.