Citric acid / magnesium oxide / sodium picosulfate
"I used Prepopik for a colonoscopy today.  Used it as instructed by my Dr and last dose was 10 pm for a 9:30am procedure.  I get colonoscopies every three years so have had many experiences with different solutions.  Prepopik was very easy to use as it is not as intense as others.  I had no side effects however I. Still had diarrhea when it was time for the procedure.  Not fun and my system was not nearly as clean as with all others I have used.  That being said I would not use this again as it is more important to prep well to get the best result from the colonoscopy.  I would put up with inconvenience to ensure a clean colon.  I will ask not to use this next time."