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  • Title: Efficacy and tolerability of split-dose magnesium citrate: low-volume (2 liters) polyethylene glycol vs. single- or split-dose polyethylene glycol bowel preparation for morning colonoscopy.
    Author: Park SS, Sinn DH, Kim YH, Lim YJ, Sun Y, Lee JH, Kim JY, Chang DK, Son HJ, Rhee PL, Rhee JC, Kim JJ.
    Journal: Am J Gastroenterol; 2010 Jun; 105(6):1319-26. PubMed ID: 20485282.
    Abstract:
    OBJECTIVES: Preparation regimens for morning colonoscopy are suboptimal. The aim of this study was to test the efficacy and tolerance of a split-dose magnesium citrate-low-volume (2 liters) polyethylene glycol (PEG) regimen for morning colonoscopy. METHODS: A total of 232 patients were randomly assigned to receive 4 liters PEG (day before procedure; group 1, n=79), 2 liters PEG (day before procedure) followed by another 2 liters PEG (day of procedure; group 2, n=80), or magnesium citrate (250 ml, day before procedure) followed by 2 liters PEG (day of procedure; group 3, n=73). The quality of bowel cleansing, tolerability, and adverse effects in group 3 were compared with those in groups 1 and 2. RESULTS: Satisfactory bowel preparation was more frequently reported for group 3 than for group 1 (75% vs. 51%, P=0.001) and was similar to that for group 2 (75% vs. 76%, P=0.896). A significantly greater proportion of patients in group 3 graded their overall satisfaction as satisfactory compared with group 1 (43% vs. 23%, P=0.010), and the proportion was similar to that in group 2 (43% vs. 35%, P=0.133). Patients in group 3 were more willing to repeat the same preparation regimen, if necessary, than those in group 1 (93% vs. 48%, P<0.001) or group 2 (93% vs. 62%, P<0.001). CONCLUSIONS: The split-dose magnesium citrate-low-volume (2 liters) PEG regimen was more efficient than and preferred to the conventional regimen of 4 liters of PEG, and it was equally efficient as, but, again, preferred to the split-dose (2+2 liters) regimen for morning colonoscopy.
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