Prep Instructions

GaviLyte | Colonoscopy Preparation Instructions

To ensure a successful exam, please follow all instructions carefully. Please bring a list of all your current medications, including any over-the-counter medications with you. If you must reschedule or cancel your appointment, please call 503-229-1883.


  • Please notify our nursing staff if you have had any major health or medication changes since scheduling your procedure. This could affect your preparation instructions.
  • Arrange for a licensed adult driver to take you home. By law, you may not drive for the rest of the day after your procedure. Public transportation is allowed with an adult escort.
  • Pick up the prescribed bowel preparation kit at your pharmacy. We recommend that you call your pharmacy prior to picking up the prep to ensure they have the prescription.
  • Medications
    • If you take any blood thinners, i.e. Coumadin, Plavix, Pradaxa, etc., please call our nursing staff if you have not received special instructions.
    • May continue to take regular medications, unless instructed by provider or nursing staff
    • May continue to take NSAIDS (Ibuprofen, Aleve, Motrin), Aspirin, and Tylenol, if needed
  • Stop Taking
    • Iron pills or vitamins with iron
    • Fish Oil
  • Stop Eating
    • Seeds, nuts, tomatoes, berries, breads with seeds or nuts


  • Start clear liquid diet. No solid foods, red or purple liquids, chewing gum, and alcohol.
  • Mix bowel prep solution:
    • Open flavor packet and pour into the container.
    • Fill the container with lukewarm water to the fill line and put into the refrigerator to chill.
  • Begin drinking the first half of the bowel prep solution around 4:00 – 6:00 pm. Drink 8 oz. every 10-15 minutes until first half is gone. *Drinking through a straw may help with the taste. You may also suck on hard candy while drinking the solution.
  • After finishing half of the prep solution, drink two (2) 8 oz. glasses of water.
  • Nausea is common while drinking prep. If this occurs, stop drinking for 30 minutes before restarting. Walking around may help relieve nausea.
  • Bowel movements usually occur within 3 hours of starting prep, but may take longer. It is recommended to stay near a restroom at this point.
  • If bowel movements have not started within three (3) hours of starting prep, then an over-the-counter suppository (Dulcolax) is advised.
  • Bowel movements should be watery. If not, drink a bottle of magnesium citrate.
  • Patients that are Diabetic
    • Evening Dose Only: Take ½ the dose of your diabetic medication(s) the day before your procedure
    • No dose the day of the procedure


  • Continue clear liquid diet–No Solid Food.
  • May take blood pressure, heart, or seizure medication the morning of the test. Hold all other medication. Be sure to take medication two hours prior to test.
  • Five (5) hours prior to leaving home, start the second half of the prep solution. Drink 8 oz. every 10-15 minutes until gone.
  • Once finished, drink two 8 oz. glasses of water.
  • Wear comfortable clothes; two-piece outfit is preferable.
  • Leave valuables at home
  • Arrive on time at the designated location with completed paperwork, photo ID, and insurance card.
  • You must have a responsible adult drive you home. We recommend that he/she stay in the waiting room during the duration of your stay; which is approximately 90 minutes. If you do not have a ride arranged we will not be able to preform the procedure.