What type of laxative could I take to prepare my bowels for a virtual colonoscopy?

Is there a tablet or type of medication I can take for a virtual colonoscopy? I just finished Chemotherapy and 35 Radiation treatments for head and neck cancer. I have not had a bowel movement in 5 days.

Healthcare Providers (2)

A virtual colonoscopy prep can be the same prep as a regular colonoscopy. This may include golytely, Miralax based, or citroma based. The prep will also depend if you have any history of kidney disease.


You will need to purchase ALL the following laxatives (in addition to the Omnipaque) before starting the preparation. The laxatives should be available at your local pharmacy. You do not need a prescription for the laxatives. 

– One 10oz. bottle of magnesium citrate (commonly sold as Citroma). This is NOT the same as “Milk of Magnesia.” 
– Four 5mg bisacodyl oral tablets (commonly sold as Carter’s Little Pills or Dulcolax). 
– One 10mg bisacodyl suppository (commonly sold as Dulcolax, Fleet Bisacodyl, or Magic Bullet). DO NOT keep this in your pocket or anywhere warm – it will melt and become unusable. 

On the day before the virtual colonoscopy:

– No solid food all day.
– Drink clear liquids only (i.e., water, tea, coffee, juice, soda, broth, jello, etc.).
– Drink 8 oz of water (about 1 glass) at least every hour (try to never be thirsty). Over the course of the day, drink at least 2 quarts of liquids.

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