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Home > Pre-Test Instructions > Colonoscopy


Many radiological exams require specific patient preparation prior to the exam in order to ensure that the study is performed in the safest and most accurate manner possible. If you are scheduled for one of the following studies, follow the instructions exactly as written. If you have any questions or feel that you cannot comply with the instructions, be sure to call your MD who scheduled the colonoscopy. Follow these instructions only if you do not have instructions from your specialist who is ordering the procedure.

A Colonoscopy is done to view the colon and rectum.

Before Exam:
Please pick up two 1 ½ oz. bottles of Fleet Phospho-Soda at your local pharmacy at least two days prior to your scheduled appointment.
Individual Responses to laxatives vary.
This prep may cause multiple bowel movements.
Begins to work between 30 minutes and 3 hours.
Remain within easy reach of toilet facilities

Day before Exam:
Drink only “clear” liquids:
Includes: strained fruit juices without pulp, water, clear broth, coffee and tea (without milk or non-dairy creamer)
Can drink the following only NOT in colors PURPLE or RED:
Carbonated and non-carbonated soft drinks
Ice popsicles
At 7:00 p.m. night before exam:
Add 1 ½ fl. oz. of Fleet Phospho-Soda to one-half glass at of cool water and drink.
Follow with one full glass of approved “clear” liquid.
Drink at least three (3) more 8 fl. oz. portions of “clear” liquid before bed; more if desired.

Day of Exam:
May drink any clear liquids during the night.
At 6:00 a.m. morning of exam (or 3 hours prior to exam):
Add 1 ½ fl. oz. of Fleet Phosho-Soda to one-half glass of cool water and drink.
Follow with one full glass of approved “clear” liquid.
May continue to drink any clear fluids prior to exam including coffee and tea (no milk or non-dairy creamer)

The information found on this site is general in nature and some of it may not apply to your specific situation. The information is also subject to change as medical knowledge advances and new methods of treatment are developed.

We encourage you to discuss your condition and treatment with your physician. Do not hesitate to contact your physician if you have any questions.

These instructions do not take the place of directions given to you by your MD.

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