Efficacy and Tolerability of Suprep With and Without Simethicone for Routine Colonoscopy for Colorectal Cancer Screening

Sodium Sulfate/Potassium Sulfate/Magnesium Sulfate Bowel Preparation With and Without Simethicone for Routine Colonoscopy: A Double-blinded Randomized Controlled Trial

The purpose of this study is to investigate Suprep bowel preparation, with and without the anti-gas medication simethicone, in terms of efficacy and patient tolerability in the preparation of patients undergoing routine colonoscopy for colorectal cancer screening.

Study Overview

• Status: Withdrawn
• Conditions: Colorectal Cancer
• Intervention / Treatment: Drug: Simethicone; Drug: sodium sulfate/potassium sulfate/magnesium sulfate solution; Drug: Placebo

Detailed Description

The study will investigate sodium sulfate/potassium sulfate/magnesium sulfate (Suprep), with and without simethicone, in terms of efficacy and patient tolerability in the preparation of patients undergoing routine colonoscopy. Adult ambulatory outpatients who are scheduled for elective routine colonoscopy for colorectal cancer screening will be recruited to participate in the trial. Patients will be randomized to receive either simethicone or placebo in addition to oral sodium sulfate/potassium sulfate/magnesium sulfate solution (Suprep) and will receive verbal and written instruction on administration of solutions. During colonoscopy, three areas of the colon (right colon, transverse colon, and left colon) will be assessed during removal of the colonoscope for overall colon cleansing, presence of bubbles, and degree of haziness; this will be scored by a blinded endoscopist. A separate written patient questionnaire will be used to assess acceptability and tolerability of the preparation, as well as any adverse events.

• Study Type: Interventional
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Florida
    • Jacksonville, Florida, United States, 32209
      • UF Health Jacksonville
  • Iowa
    • Clive, Iowa, United States, 50325
      • Iowa Endoscopy Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Age greater than 18 years
• Outpatients who require elective colonoscopy for colorectal cancer screening at Iowa Endoscopy Center and at University of Florida - Jacksonville

Exclusion Criteria:

• Allergy or hypersensitivity to any constituent of the lavage solution or to simethicone
• Presence of any contraindication to colonoscopy (i.e. uncontrolled congestive heart failure, New York Heart Association classification III-IV, history of myocardial infarction within 6 months, coagulopathy)
• Massive ascites
• Renal insufficiency
• Pregnancy
• History of colonic surgery
• History of anti-flatulence or laxative agent within one week
• Refusal/inability to give consent
• Patients undergoing colonoscopy for reasons other than colorectal cancer screening
• Mentally disabled
• Non-English-speaking patients

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Screening
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Simethicone Group; Early in the evening prior to colonoscopy, patients will be instructed to consume one 6 ounce bottle of oral sodium sulfate/potassium sulfate/magnesium sulfate (Suprep) solution (containing sodium sulfate 17.5 grams, potassium sulfate 3.13 grams, and magnesium sulfate 1.6 grams) diluted with 16 ounces of water over one hour. Over the next hour, the patient will be instructed to drink an additional 32 ounces of water. On the day of colonoscopy, the same procedure will be repeated. Patients will take 2.4 mL simethicone in a half glass of water immediately after consuming each dose of the Suprep. All of the bowel preparation solution and required water should be consumed at least 2 hours prior to colonoscopy.	Drug: Simethicone; Patients will be randomized to receive either simethicone or placebo in addition to oral sodium sulfate/potassium sulfate/magnesium sulfate solution (Suprep), and will be blinded to whether they are in the simethicone arm or the placebo arm of the trial. Simethicone and placebo will be prepared as identically-appearing liquid solution (2.4 mL) with the assistance of a pharmacist. The simethicone or placebo solution will then be assigned to patients according to the randomization scheme and samples will be labeled with patient information prior to distribution. Only the pharmacist will participate in the labeling process and know which patients receive simethicone or placebo; administering staff, nurses, physicians, and patients will be blinded to this.; Other Names: Gas-X Infant Drops; Infants Gas Relief; Infants Simethicone; Infants' Mylicon; Drug: sodium sulfate/potassium sulfate/magnesium sulfate solution; Both arms will receive sodium sulfate/potassium sulfate/magnesium sulfate solution for bowel preparation; Other Names: Suprep Bowel Prep Kit
Placebo Comparator: Placebo Group; Early in the evening prior to colonoscopy, patients will be instructed to consume one 6 ounce bottle of oral sodium sulfate/potassium sulfate/magnesium sulfate (Suprep) solution (containing sodium sulfate 17.5 grams, potassium sulfate 3.13 grams, and magnesium sulfate 1.6 grams) diluted with 16 ounces of water over one hour. Over the next hour, the patient will be instructed to drink an additional 32 ounces of water. On the day of colonoscopy, the same procedure will be repeated. Patients will take 2.4 mL of placebo (identical in appearance to simethicone) in a half glass of water immediately after consuming each dose of the Suprep. All of the bowel preparation solution and required water should be consumed at least 2 hours prior to colonoscopy.	Drug: sodium sulfate/potassium sulfate/magnesium sulfate solution; Both arms will receive sodium sulfate/potassium sulfate/magnesium sulfate solution for bowel preparation; Other Names: Suprep Bowel Prep Kit; Drug: Placebo; Patients will be randomized to receive either simethicone or placebo in addition to oral sodium sulfate/potassium sulfate/magnesium sulfate solution (Suprep), and will be blinded to whether they are in the simethicone arm or the placebo arm of the trial. Simethicone and placebo will be prepared as identically-appearing liquid solution (2.4 mL) with the assistance of a pharmacist. The simethicone or placebo solution will then be assigned to patients according to the randomization scheme and samples will be labeled with patient information prior to distribution. Only the pharmacist will participate in the labeling process and know which patients receive simethicone or placebo; administering staff, nurses, physicians, and patients will be blinded to this.; Other Names: Inert solution

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Overall bowel cleansing	To be assessed during removal of the colonoscope during the procedure and blinded endoscopist will score using a written questionnaire	During procedure

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of patients with adverse effects	A written patient questionnaire will be used to assess patient acceptability and tolerability by recording any adverse effects experienced, including nausea, vomiting, headache, insomnia, bloating, abdominal pain, abdominal discomfort, abdominal cramps or any others.	Day prior to and day of colonoscopy
Number of patients completing the bowel preparation	A written patient questionnaire will be used to assess compliance by asking if the total prescribed volume of solution was ingested and by recording number of evacuations.	Day prior to and day of colonoscopy

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Presence of bubbles	To be assessed during removal of the colonoscope during the procedure and blinded endoscopist will score using a written questionnaire	During procedure
Degree of haziness	To be assessed during removal of the colonoscope during the procedure and blinded endoscopist will score using a written questionnaire	During procedure

Collaborators and Investigators

• Sponsor: MercyOne Des Moines Medical Center
• Investigators: Principal Investigator: Tercio Lopes, MD, Iowa Digestive Disease Center; Principal Investigator: Silvio de Melo, MD, University of Florida Health Systems, Jacksonville

Publications and helpful links

General Publications

• Gentile M, De Rosa M, Cestaro G, Forestieri P. 2 L PEG plus ascorbic acid versus 4 L PEG plus simethicon for colonoscopy preparation: a randomized single-blind clinical trial. Surg Laparosc Endosc Percutan Tech. 2013 Jun;23(3):276-80. doi: 10.1097/SLE.0b013e31828e389d.
• Wexner SD, Beck DE, Baron TH, Fanelli RD, Hyman N, Shen B, Wasco KE; American Society of Colon and Rectal Surgeons; American Society for Gastrointestinal Endoscopy; Society of American Gastrointestinal and Endoscopic Surgeons. A consensus document on bowel preparation before colonoscopy: prepared by a task force from the American Society of Colon and Rectal Surgeons (ASCRS), the American Society for Gastrointestinal Endoscopy (ASGE), and the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES). Gastrointest Endosc. 2006 Jun;63(7):894-909. doi: 10.1016/j.gie.2006.03.918. No abstract available. Erratum In: Gastrointest Endosc. 2006 Jul;64(1):154.
• Chiu HM, Lin JT, Wang HP, Lee YC, Wu MS. The impact of colon preparation timing on colonoscopic detection of colorectal neoplasms--a prospective endoscopist-blinded randomized trial. Am J Gastroenterol. 2006 Dec;101(12):2719-25. doi: 10.1111/j.1572-0241.2006.00868.x. Epub 2006 Oct 6.
• Pontone S, Angelini R, Standoli M, Patrizi G, Culasso F, Pontone P, Redler A. Low-volume plus ascorbic acid vs high-volume plus simethicone bowel preparation before colonoscopy. World J Gastroenterol. 2011 Nov 14;17(42):4689-95. doi: 10.3748/wjg.v17.i42.4689.
• Jansen SV, Goedhard JG, Winkens B, van Deursen CT. Preparation before colonoscopy: a randomized controlled trial comparing different regimes. Eur J Gastroenterol Hepatol. 2011 Oct;23(10):897-902. doi: 10.1097/MEG.0b013e32834a3444.
• Valiante F, Bellumat A, De Bona M, De Boni M. Bisacodyl plus split 2-L polyethylene glycol-citrate-simethicone improves quality of bowel preparation before screening colonoscopy. World J Gastroenterol. 2013 Sep 7;19(33):5493-9. doi: 10.3748/wjg.v19.i33.5493.
• Tongprasert S, Sobhonslidsuk A, Rattanasiri S. Improving quality of colonoscopy by adding simethicone to sodium phosphate bowel preparation. World J Gastroenterol. 2009 Jun 28;15(24):3032-7. doi: 10.3748/wjg.15.3032.
• Park JJ, Lee SK, Jang JY, Kim HJ, Kim NH. The effectiveness of simethicone in improving visibility during colonoscopy. Hepatogastroenterology. 2009 Sep-Oct;56(94-95):1321-5.
• Sudduth RH, DeAngelis S, Sherman KE, McNally PR. The effectiveness of simethicone in improving visibility during colonoscopy when given with a sodium phosphate solution: a double-bind randomized study. Gastrointest Endosc. 1995 Nov;42(5):413-5. doi: 10.1016/s0016-5107(95)70041-2.
• Lazzaroni M, Petrillo M, Desideri S, Bianchi Porro G. Efficacy and tolerability of polyethylene glycol-electrolyte lavage solution with and without simethicone in the preparation of patients with inflammatory bowel disease for colonoscopy. Aliment Pharmacol Ther. 1993 Dec;7(6):655-9. doi: 10.1111/j.1365-2036.1993.tb00148.x.
• Shaver WA, Storms P, Peterson WL. Improvement of oral colonic lavage with supplemental simethicone. Dig Dis Sci. 1988 Feb;33(2):185-8. doi: 10.1007/BF01535731.
• McNally PR, Maydonovitch CL, Wong RK. The effect of simethicone on colonic visibility after night-prior colonic lavage. A double-blind randomized study. J Clin Gastroenterol. 1989 Dec;11(6):650-2. doi: 10.1097/00004836-198912000-00010.
• McNally PR, Maydonovitch CL, Wong RK. The effectiveness of simethicone in improving visibility during colonoscopy: a double-blind randomized study. Gastrointest Endosc. 1988 May-Jun;34(3):255-8. doi: 10.1016/s0016-5107(88)71324-3.
• Wu L, Cao Y, Liao C, Huang J, Gao F. Systematic review and meta-analysis of randomized controlled trials of Simethicone for gastrointestinal endoscopic visibility. Scand J Gastroenterol. 2011 Feb;46(2):227-35. doi: 10.3109/00365521.2010.525714. Epub 2010 Oct 26.

Study record dates

Study Major Dates

• Study Start: March 1, 2016
• Primary Completion (Actual): December 1, 2017
• Study Completion (Actual): December 1, 2017

Study Registration Dates

• First Submitted: August 12, 2015
• First Submitted That Met QC Criteria: August 13, 2015
• First Posted (Estimate): August 14, 2015

Study Record Updates

• Last Update Posted (Actual): February 12, 2020
• Last Update Submitted That Met QC Criteria: February 10, 2020
• Last Verified: February 1, 2020

More Information

Terms related to this study

• Keywords: Simethicone; Colorectal cancer screening; Mass screening; Bowel cleansing; Suprep; Routine colonoscopy; sodium sulfate/potassium sulfate/magnesium sulfate
• Additional Relevant MeSH Terms: Digestive System Diseases; Neoplasms; Neoplasms by Site; Gastrointestinal Neoplasms; Digestive System Neoplasms; Gastrointestinal Diseases; Colonic Diseases; Intestinal Diseases; Intestinal Neoplasms; Rectal Diseases; Colorectal Neoplasms; Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Anti-Arrhythmia Agents; Central Nervous System Depressants; Peripheral Nervous System Agents; Analgesics; Sensory System Agents; Anesthetics; Gastrointestinal Agents; Dermatologic Agents; Membrane Transport Modulators; Anticonvulsants; Calcium-Regulating Hormones and Agents; Reproductive Control Agents; Calcium Channel Blockers; Antifoaming Agents; Emollients; Cathartics; Tocolytic Agents; Simethicone; Pharmaceutical Solutions; Magnesium Sulfate; Sodium sulfate
• Other Study ID Numbers: MMC2015-31