MRI Assessment of Mode of Action of Bisacodyl, Multiple Doses (MODEM)

A Phase IV, Crossover, Randomized, Double Blind and Placebo-controlled Clinical Trial to Evaluate the Mode of Action of Multiple Doses of Bisacodyl in Subjects With Occasional Constipation

Constipation remains an important unmet medical need. Patients are currently often dissatisfied with treatment, because of lack of predictability of the laxative, side effects (mainly abdominal pain) and perceived decrease of efficacy with time. A recent systematic review1 of a range of laxatives reported that bisacodyl increases the number of complete spontaneous bowel movements statistically significant compared to placebo. Recently non-invasive Magnetic Resonance Imaging (MRI) techniques have been developed to assess small intestinal fluid distribution, transit and motility as well as colonic fluid, volumes and motility in healthy volunteers and constipated subjects. Other laxatives such as movecol and ispaghula have been investigated using this methodology. This study will use these novel techniques to further characterize bisacodyl's mode of action.

This study is intended to assess the effect of multiple doses of bisacodyl on the gut motor function and its effect on water distribution within the small and large intestine in subjects with occasional constipation by MRI. It may allow better understanding of the relative importance of both the secretory and the prokinetic effect of bisacodyl.

Since bisacodyl, is often used by self-medicating people with constipation it is proposed to study subjects suffering from occasional constipation. As such subjects often take the drug intermittently it would be of interest to study both the acute response after single dose and the response after several days of treatment to see if this alters the response.

The current study will be performed as a cross-over with 2-period and 2-treatment (bisacodyl/placebo), for assessing the effects over of multiple doses of 5mg bisacodyl.

Evaluations will be performed after multiple doses of bisacodyl or placebo in two different time periods, separated by a 2 week washout period between end of period 1 and start of period 2.

The study will recruit individuals ≥18yrs from the general public who consider themselves as suffering from occasional constipation and who self-medicate with an occasional over-the counter (OTC) laxative, not more than once a week. Up to 18 adult healthy subjects will be recruited to ensure 10 evaluable subjects. An evaluable subject is defined as participant having the primary endpoint assessed (ascending colon T1 300, 375, and 450 minutes correctly evaluated) for the two periods of the crossover.

Study Overview

• Status: Completed
• Conditions: Constipation
• Intervention / Treatment: Drug: Bisacodyl 5 milligram; Drug: Placebo oral tablet

• Study Type: Interventional
• Enrollment (Actual): 12
• Phase: Phase 4

Contacts and Locations

Study Locations

• United Kingdom
  • Nottinghamshire
    • Nottingham, Nottinghamshire, United Kingdom, NG7 2RD
      • University of Nottingham

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

I 01. Adult subjects that self-medicate with occasional laxative no more than 4 times in the month before eligibility confirmation

I 02. Meet Rome IV criteria for Chronic Constipation.

I 03. ≥18 years of age inclusive, at the time of signing the informed consent.

I 04. Screening diary confirms they experience at least 2 days in the 7 day diary with either hard stools (Bristol Stool form Score 1 or 2) or no bowel movement

I 05. BMI under or equal to 35 kg/m2

I 06. Female subjects of child bearing potential must have a negative urine pregnancy test at screening. Subjects of child bearing potential or with partners of child bearing potential must agree to use methods of medically acceptable forms of contraception during the study and for 90 days after completion of study drug, (e.g. implants, injectable, combined oral contraceptives, barrier methods, true abstinence (when this is in line with the preferred and usual lifestyle of the patient) or vasectomised partners).

I 07. Capable of giving signed informed consent as described in Appendix 1 (Section 10.1) which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.

Exclusion Criteria:

E 01. Known hypersensitivity or other contraindications to bisacodyl use: such as ileus, intestinal obstruction, acute abdominal conditions including appendicitis, acute inflammatory bowel diseases, and severe abdominal pain associated with nausea and vomiting; and severe dehydration or rare hereditary conditions that may be incompatible with an excipient of the product (galactose intolerance, e.g. galactosaemia, fructose intolerance.

E 02. Pregnancy and/or breast breast-feeding or positive urine pregnancy test History of known gastrointestinal organic disease (i.e. celiac disease, inflammatory bowel diseases).

E 03. A positive diagnosis of irritable bowel syndrome based on the Rome IV criteria questionnaire which requires the patient to experience abdominal pain at least weekly

E 04. Reported history of previous major abdominal surgery (excluding appendectomy and cholecystectomy)

E 05. Any medical condition making participation potentially compromising the participation in the study (e.g. diabetes mellitus, respiratory disease limiting ability to lie in the scanner, known allergy to one of the food products) as per investigator's judgment

E 06. Contraindications for MRI scanning i.e. metallic implants, pacemakers, history of metallic foreign body in eye(s) and penetrating eye injury

E 07. Any condition incompatible with the patient's participation to the study as per investigator's judgment.

E 08. Not willing or able agree to dietary restrictions required in 24 hours before each MRI study day

E 09. Anticipate need for antibiotics intake during the study.

E 10. Unwilling to stop probiotics for the duration of the study period

E 11. Unable/ not willing to stop drugs known to alter GI motility including, regular loperamide, antispasmodics, (e.g. buscopan, mebeverine, peppermint oil, alverine citrate), eluxadoline opiates, monoamine oxidase inhibitors, phenothiazines, benzodiazepines, calcium channel antagonists for the duration of the study (Selective serotonin reuptake inhibitors and low dose tricyclic antidepressants (< 30mg amitriptyline or 50mg nortriptyline) will be recorded but provided dose is stable, will not be an exclusion criteria).

E 12. Having taken part in a research study within 3 months

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: bisacodyl; bisacodyl 5mg tablet, once a day on three consecutive days	Drug: Bisacodyl 5 milligram; three doses taken, one per day on three consecutive days; Other Names: dulcolax
Placebo Comparator: placebo; tablet, once a day on three consecutive days	Drug: Placebo oral tablet; three doses taken, one per day on three consecutive days

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Consistency of chyme in ascending colon	as measured by MRI (T1)	Area under the curve 300-450 minutes after third intake of intervention

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Longer term consistency of chyme in ascending colon	as measured by MRI (T1)	24 hours after third drug intake
Gut motor function	colonic and small bowel motility as assessed by MRI	0-150 and 150-450 minutes after third intake of intervention
Small intestinal water content	as measured by MRI	0-150 and 150-450 minutes after third intake of intervention
Colon volumes	as measured by MRI	0-150 and 150-450 minutes after third intake of intervention
Speed of whole gut transit	weighted average position score of transit markers	at 450 minutes and 24 hours after transit marker and third study drug intake

Collaborators and Investigators

• Sponsor: University of Nottingham
• Collaborators: Sanofi
• Investigators: Principal Investigator: Robin Spiller, PhD, University of Nottingham

Study record dates

Study Major Dates

• Study Start (Actual): October 4, 2020
• Primary Completion (Actual): November 1, 2022
• Study Completion (Actual): November 1, 2022

Study Registration Dates

• First Submitted: October 14, 2019
• First Submitted That Met QC Criteria: October 14, 2019
• First Posted (Actual): October 17, 2019

Study Record Updates

• Last Update Posted (Actual): July 3, 2024
• Last Update Submitted That Met QC Criteria: June 30, 2024
• Last Verified: June 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Signs and Symptoms, Digestive; Constipation; Gastrointestinal Agents; Cathartics; Laxatives; Bisacodyl
• Other Study ID Numbers: CHC-2019-12563

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No