Flexible Sigmoidoscopy Prep Instructions

Five Days Before the Procedure:

  • Contact prescribing physician for dosage instructions of blood thinners.

  • If you are diabetic please contact our office for instructions.

  • Stop eating nuts and small seeds.

  • Stop taking iron (even multivitamins containing iron).

  • Make sure you have a driver arranged to take you home.

Two Days Before the Procedure:

  • Obtain 2 Plain Fleet Enemas from your pharmacy.

  • Avoid vegetables, pulpy fruits, oatmeal, and cereal with high fiber, nuts, and small seeds.

Day of the Procedure:

  • One hour before leaving home: Give yourself the first enema, hold as long as possible, up to 20 min and expel it.  Allow yourself to rest for a few minutes.  Follow with the second enema, again holding for no more than 20 minutes.


  • If you have a tendency towards constipation, please take 3 enemas and begin process 1 ½  hours before leaving home.

  • You may take regular medications with small sips of water.

  • If your prep is not working please call our office and ask for the office nurse of your physician. After hours calls will be forwarded to the doctor that is on call.

Clear Liquid Diet:

As a rule – if you can see through it you can drink it. NO RED OR PURPLE DYES. 

  • Clear fruit juices – white grape juices or apple juice

  • Kool-Aid, Power-Aid, Gatorade – No red or purple

  • Soup – broth or bouillon

  • Tea or coffee WITHOUT creamers

  • Soda – 7-UP, Sprite, Ginger Ale, Orange Soda

  • Jell-O (no red or purple)

  • 100% cranberry or pomegranate juice (these are red but do not contain dyes).