• To compare the efficacy of morning dose only MoviPrep® ("AM Dosing") where one-half of the prep is given 7 hours before colonoscopy and the second half is given 4 hours before colonoscopy, versus split dose (PM/AM) MoviPrep® ("PM/AM Dosing") where one-half of the prep is given at 6pm the night prior to colonoscopy and the second half is given 4 hours before colonoscopy.