Citric acid / magnesium oxide / sodium picosulfate
"As a colon cancer patient, I have had colonoscopies every 6 months for years.  As an old pro, I must say that I have NEVER experienced anything remotely as totally ineffective as this supposed preparation.  As a result, I must reschedule for after the first of the year and pay my full medical deductible immediately, rather than no cost because deductible is already met for this year.  My husband will be docked pay for taking off to drive me.  I will have to take another week off blood thinner.  And I feel nauseated, bloated, and angry.  Shame on prepopik for taking good folks' money with false claims!"