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Completed

NCT Number: NCT01887470

2 Regimens of Lactulose for Colonoscopy Preparation in Adults

The purpose of the study is to determine the efficacy of 2 regimens of lactulose as a preparation for colonoscopy.

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Key information

Conditions

Colonoscopy Preparation

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

ClinSearch, LLC

Chattanooga, Tennessee, 37421, United States

About this study

A full-dose regimen of lactulose for oral solution, where all dosing is completed the evening prior to the colonoscopy procedure, will be studied and compared to a split-dose regimen, where three doses are taken on the prior evening, and one dose is taken the morning of the procedure.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients requiring bowel evacuation for colonoscopy.

Exclusion criteria

  • Patients with galactosemia (galactose-sensitive diet).
  • Patients known to be hypersensitive to any of the components of lactulose for oral solution.
  • Patients with an abnormality on screening blood work or vital sign assessments that, in the Investigator's judgment, may pose a significant risk including those pertaining to dehydration or electrolyte shifts.
  • Patients with a history of impaired renal function.
  • Patients with current or recent history of hypotension, as defined by the Investigator.
  • Patients with a history of long Q-T syndrome.
  • Patients with a history of a failed bowel preparation.
  • Patients with severe constipation, defined as those patients taking daily prescription or over-the-counter laxatives.
  • Patients with possible bowel obstruction, gastric retention, bowel perforation, toxic colitis, toxic megacolon, ileus or previous colonic surgery.
  • Patients on lactulose therapy or receiving any treatment for chronic constipation.
  • Be pregnant or nursing.
  • Patients with known large polyps or flat polyps (i.e. polyps requiring electrocautery or argon plasma coagulation).
  • Patients less than 18 years of age.
  • Inability to understand the requirements of the study or be unwilling to provide written informed consent (as evidenced by signature on an informed consent document approved by an Institutional Review Board [IRB]) and agree to abide by the study restrictions.
  • Be otherwise unsuitable for the study, in the opinion of the Investigator.

Treatment and study plan

Full dose preparation

Drug

Other names: Evening-only Regimen

Split dose preparation

Drug

Primary outcomes

  1. Efficacy of Lactulose as a Preparation for Colonoscopy.

    Time frame: at least 3 hours post last consumption

    Efficacy assessed by the physician's determination of the cleanliness of the colon using the cumulative Boston Bowel Preparation Scale (BBPS) score. The cumulative score is derived from three segmental scores assessed from the following three colonic segments: right colon, transverse colon, and left colon. Segment scores range from 0 to 3 with the following abbreviated definitions: 0=mucosa not visible; 1=a portion of the mucosa is visible; 2=minor residue, but mucosa is seen well; 3=entire mucosa is seen well with no residue.

    The cumulative BBPS score is the sum of the three segment scores such that a cumulative score of 9 represents a colon with maximum mucosa visible and a score of 0 represents minimal visibility.

Secondary outcomes

  1. Incidence of Treatment Failure

    Time frame: at least 3 hours post last consumption

    A treatment failure is defined in the protocol as a bowel preparation that receives a cumulative Boston Bowel Preparation Score less than 5, or has one or more of the segments scored as a 0.

  2. Tolerability of and Preference for Lactulose as a Bowel Evacuant-Patient Visual Analog Scale (VAS)

    Time frame: 3 - 15 hours post last consumption

    A paper questionnaire contained a horizontal line 100 mm long with the right end labeled "Best Possible Experience" and the left end labeled "Worst Possible Experience". The patients were asked to use a pen to place a mark on the line at the point that best described their overall tolerability for the bowel preparation.

    Scores were determined by measuring the distance of the mark from the left end of the line. So, a lower number would indicate a poor experience and a high number would reflect a positive experience, with 100 being the maximum score and one that describes the best possible experience with the preparation.

  3. Tolerability of and Preference for Lactulose as a Bowel Evacuant-Likert 1

    Time frame: 3-15 hours post last consumption

    Tolerability assessed by a patient questionnaire - Likert response to "was regimen a tolerable bowel prep?" Range of responses allowed include whole numbers between 1 and 7. The following guide was given to the patients: 1 = Strongly Disagree; 4 = Neutral; 7 = Strongly Agree

  4. Tolerability of and Preference for Lactulose as a Bowel Evacuant-Likert 2

    Time frame: 3-15 hours post last consumption

    Tolerability assessed by a patient questionnaire - Likert response to "I did not experience too much discomfort during the bowel prep" Range of responses allowed include whole numbers between 1 and 7. The following guide was given to the patients: 1 = Strongly Disagree; 4 = Neutral; 7 = Strongly Agree

  5. Tolerability of and Preference for Lactulose as a Bowel Evacuant-Likert 3

    Time frame: 3 - 15 hours post last consumption

    Tolerability assessed by a patient questionnaire - Likert response to "The dosing instructions were easy to understand and follow" Range of responses allowed include whole numbers between 1 and 7. The following guide was given to the patients: 1 = Strongly Disagree; 4 = Neutral; 7 = Strongly Agree

  6. Tolerability of and Preference for Lactulose as a Bowel Evacuant

    Time frame: 3 - 15 hours post last consumption

    Survey response to question: "Would you be willing to repeat this preparation if a colonoscopy was felt to be medically necessary at some point in the future? The outcome measure is reporting the percentage of participants who replied "Yes" to this survey question.

  7. Tolerability of and Preference for Lactulose as a Bowel Evacuant

    Time frame: 3 to 15 hours post last consumption

    Survey response to question: "if you had a previous colonoscopy, please indicate your preference for the crystalline lactulose or the previous medications.

  8. Colonic Hydrogen Gas Levels

    Time frame: 3 - 15 hours post last consumption

  9. Colonic Methane Gas Levels

    Time frame: 3 - 15 hours post last consumption

Sponsors and collaborators

Lead sponsor

Cumberland Pharmaceuticals

Industry

Registry information

Official study title

A Randomized, Single-blind Pilot Study to Determine the Safety, Efficacy, and Patient Preference of 2 Regimens of Lactulose for Cleansing of the Colon as a Preparation for Colonoscopy in Adults

Important dates

Study start
2013
Primary completion
2013
Study completion
2013
First posted
Jun 26, 2013
Registry last updated
Jun 1, 2015

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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