LytePrep Split Dose

St. Luke's Emergency Department

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LytePrep Split Dose

(First dose of prep is taken the evening before and second dose the morning of the procedure)

Please read all of these instructions carefully several days before the procedure.

You must follow the instructions exactly in order to cleanse your colon adequately. If your colon is not properly prepared, it may result in cancellation of your procedure. You will be given a prescription for the oral colon purge solution (PEG, GoLytely, NuLytely, Colyte, Trilyte, etc.) and you will need to purchase an over the counter laxative Dulcolax (Biscodyl-generic).

4 Days prior to procedure:

Avoid high fiber foods such as corn, nuts, tomatoes, lettuce, fruit skins, fresh or dried fruits, bran cereals, fiber/granola bars, etc. See links above for examples of Low Fiber Diet and Clear Liquid Diet.

1 Day prior to procedure:

You are to have Clear Liquids only the entire day before your procedure and are encouraged to drink liberally, at least 10 (8 oz.) glasses, throughout the day. Clear liquids include: broth, tea, plain Jell-o(without fruit), punch, Kool-Aid, Sprite, 7-up, clear juices (i.e. apple or cranberry) sports drinks, flavored waters or Popsicles. If you drink or consume red colored products, you may experience red colored bowel movements so this is not advised. You may have clear liquids up until 2 hours before the time of your procedure.

* Please note, the start times below are approximations. If you need to move the start time up or back an hour or more, then adjust the other times the same amount.

At 5 pm the Day prior to procedure:

Take 1 Dulcolax tablet (Biscodyl-generic) every 10 minutes with an 8 oz. glass of water until you have taken a total of 2 tablets (over the counter, no prescription needed).

Colon purge solution preparation:

Follow the instructions on the colon purge solution for filling with water. Shake well. Do not add sugar or flavorings, unless given to you at the pharmacy. Do not add ice or chill solution, drink the purge solution at room temperature.

At 6 pm the Day prior to procedure:

Begin drinking the colon purge solution. Drink an 8 oz. glass every 5-10 minutes (total of 8 glasses or half the total volume). Put the rest in the refrigerator for later. It is best to drink the whole glass quickly rather than sipping small amounts continuously.

Feelings of bloating are common after the first few glasses because of the large amount of fluid ingested. This is usually temporary and should disappear once bowel movements begin. If you experience nausea or cramping, stop drinking for 15 minutes. Try drinking warm tea, broth, or hard candy, and then begin again. Your stools should begin after the first 4-6 glasses. Continue drinking once the stools have begun. They should become more and more liquid and lighter in color.

The morning of the procedure:

Take the remaining colon purge solution out of the refrigerator 1/2 hour prior to drinking your second dose.

3 hours before you leave to go to endoscopy unit:

Start drinking the rest of the colon purge solution as above and continue until the solution is all gone. This should be completed in 2 hours or less. The prep is not complete until the stools are clear or light yellow water. Do NOT eat any solid food until after your exam. You may have clear liquids up until 2 hours before the time of your procedure. Arrive on time for your procedure.

If you have questions or experience difficulty with the prep:

Please first look at this link Colon Prep: Questions & Answers. If that does not answer your questions, then call the Endoscopy Unit at the number below. You may call any time day or night. An endoscopy nurse is on call from home after regular hours.

St. Lukes Endoscopy Unit:



Enter the East entrance drive from A Ave. To your left is a Reserved Parking lot. Look for the green sign. Press the parking gate button and gate will open as you enter. Enter east entrance of hospital, take first elevator to 4th floor and follow signs to Digestive Health Center.

Surgery Center Cedar Rapids:

319-558-4800 (6am-4pm) after 4pm: 319-533-7136


Address is 1075 1st Ave, SE, Cedar rapids, IA 52402.
Click here for Google Maps Directions.


--You must have a driver available to take you home once the procedure is completed. NO CABS OR BUSES. The procedure will be cancelled if you do not have a driver to take you home. Your stay will be approximately 2 1/2 to 3 hours.

--You will need a responsible adult to stay with you after your procedure for the remainder of the day.

--If you are on Plavix, Coumadin, Lovenox, or Ticlid, please talk to your doctor well in advance of the procedure.

--DO NOT use Advil (Ibuprofen), Aleve (Naproxen), Relafen, Mobic, Motrin or other NSAIDs for 5 days prior to procedure. You may take Tylenol.

--DO NOT use Fish Oil for 7 days prior to procedure.

--Please take necessary prescription medications, such as blood pressure and asthma medications, with a small amount of water on the morning of the procedure.

--Stop iron supplements at least one week before your procedure. This includes vitamins with iron.

--Stop FIBER supplements 2 days before the procedure. This includes METAMUCIL, CITRUCEL.

--Leave valuables at home.

--Bring a list of your medications and allergies with you.

--Contact your insurance company and confirm the details of your coverage and pre-certification.

--Bring your insurance and/or Medicare cards.