Unit 75, Level 4, Wexford Medical Centre
3 Barry Marshall Parade, Murdoch, WA 6150
Phone : (08) 6389 0631 | Fax : (08) 6313 0613

Bowel Preparation for Colonoscopy

Please find below information sheets about your procedure. Please feel free to download the appropriate one and print off for your reference. Please bear in mind the better your bowel prep the higher the quality of your test.

There are two different information sheets for colonoscopy depending on the type of bowel prep you need to take (Picoprep or Colonic lavage).
 Our standard prep is a Picoprep/Colonlytely combination (you can use Glycoprep or Golytely, if Colonlytely is unavailable) and instructions are in the sheet titled ‘Picoprep’ below. This is suitable for 90% of our patients. However it is not suitable if you are aged over 75 years old, have kidney problems or some people with inflammatory bowel disease (UC or Crohn’s). These patients should use the bowel prep titled ‘Colonic Lavage‘ below.

Tips for a Successful Prep:

  • Follow the instructions on the bowel prep sheet. Please read both sides of the sheet.
  • Diet – Undigested vegetable matter reduces the quality of the test. Please avoid seeds, grains, nuts, peas, tomatoes, grapes, beans and vegetable skins 2 days prior to your test.
  • No Solid Foods – You must not eat any solid food for at least 24 hours before your test. The exact time you need to stop eating solid food will be in your bowel prep instruction sheet.
  • Fasting – Having a full stomach at the time of your procedure is very dangerous and increases your risk of complications of sedation. Please follow the instructions about fasting. If you are feeling very dehydrated you can drink water only up until 3 hours prior to your arrival time. You should take your normal tablets (except diabetic tablets) with a sip of water at 6am on the day of your procedure.
  • Constipation – If you have troublesome constipation please take your normal laxatives everyday for 4 days leading up to the test to start to clear your bowel out.
  • Chill the Colonlytely (or Glycoprep or Golytely) in the fridge, this makes it more palatable.
  • Nausea, Vomiting and Headaches – If you are prone to nausea and vomiting discuss using an anti-emetic (e.g. Maxalon or Stemetil) with your GP or Pharmacist. If you suffer from headaches, Anagraine (Paracetamol & Maxalon combination) can be taken 1 hour prior to starting your bowel prep and then regularly as per the instructions on the packet.
  • Stay Hydrated – Drink a variety of clear fluids including water, black tea or coffee, clear soups, clear apple juice, jelly or isotonic sports drinks. You must avoid red and green food colouring.
  • Delicate Skin – Use moist baby wipes and a nappy barrier cream on your bottom to make it more comfortable.


Patients who cannot tolerate Picoprep or Colonic lavage can use Diacol tablet preparation (swallowing approximately 32 capsules plus lots of clear fluids), however we find this prep to be less effective than Picoprep. Diacol is not suitable for patients with kidney disease or those over 75 years of age. If you wish to have this prep please contact the rooms for instructions.

If you are unsure which prep you should use please contact the rooms.

For mor information about preparing for your procedure please read our Do’s & Don’t page for frequently asked questions.

Download Coastal Gastroenterology Bowel Preparation Information Sheets

If you require further information this link is helpful: