Efficacy and Safety Study of CB-5945 for the Treatment of Opioid-Induced Constipation

October 17, 2018 updated by: Cubist Pharmaceuticals LLC

A Multicenter, Randomized, Double-Blind, Placebo-Controlled, Phase 3 Study to Evaluate the Efficacy and Safety of CB-5945 for the Treatment of Opioid-Induced Constipation in Adults Taking Opioid Therapy for Chronic Non-Cancer Pain

The purpose of this study is to evaluate the safety and efficacy of CB-5945 for the treatment of opioid-induced constipation (OIC)in adults taking opioid therapy for chronic non-cancer pain.

Study Overview

Status

Terminated

Intervention / Treatment

Detailed Description

This is a multicenter, double-blind, placebo-controlled, parallel-group study in participants with OIC taking opioid therapy for chronic non-cancer pain. Approximately 600 participants (300 participants per treatment group) with OIC will be randomized at approximately 75 study centers to receive either oral 0.25 mg CB-5945 BID or oral matching placebo BID for the 12-week double-blind treatment period, followed by a 4-week follow-up period. All randomized participants will be evaluated for clinical response for duration of their study participation. All participants will be followed for safety for 4 weeks after last dose of the study medication, regardless of when they discontinue study medication. The clinical study report for this study includes pooled results for studies 5945-OIC-12-02 (NCT01901302) 5945-OIC-12-03 (NCT01901328), and 5945-OIC-12-04 (NCT01901341).

Study Type

Interventional

Enrollment (Actual)

49

Phase

  • Phase 3

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Key Inclusion Criteria:

  • Is taking a stable daily dose of opioids of ≥30 mg morphine equivalent total daily dose (METDD) for chronic non-cancer pain
  • Has constipation that is caused by the chronic use of opioids
  • Is willing to use only the study provided laxative(s) and to discontinue use of all other laxatives, enemas, stool softeners, and other medications to treat constipation (e.g., lubiprostone) from Screening until the last study assessment

Key Exclusion Criteria:

  • Has gastrointestinal (GI) or pelvic disorders known to affect bowel transit (for example [e.g.], obstruction) or contribute to bowel dysfunction
  • Has evidence of intestinal obstruction
  • Has a history of rectal bleeding not due to hemorrhoids or fissures within 6 months of screening
  • Has an active malignancy of any type (participants with a history of successfully treated malignancy >5 years before the scheduled administration of study medication and participants with treated basal or squamous cell cancer may be enrolled)
  • Is taking antispasmodics (e.g., dicyclomine), antidiarrheals (e.g., loperamide), prokinetics (e.g., metoclopramide), or locally acting chloride channel activators (e.g., lubiprostone)
  • Is taking non-opioid medications known to cause constipation (e.g., iron sulfate therapy, tricyclic antidepressants)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Placebo
Placebo administered orally BID for a 12-week treatment period
Experimental: CB-5945
0.25 milligrams (mg) CB-5945 administered orally twice dailly (BID) for a 12-week treatment period
Other Names:
  • Bevenopran
  • ADL5945

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Overall Spontaneous Bowel Movement (SBM) Responder Rates at 12-weeks
Time Frame: 12 weeks
A Spontaneous Bowel Movement (SBM) Weekly Responder (calculated for each week of the 12-week double-blind treatment period) is a participant who has ≥ 3 SBMs for the week and an increase from baseline of ≥1 SBM for the specified week, based on at least 4 Available Data Days (ADDs) during the week. For the definition of the primary efficacy endpoint, Overall SBM Responder is a participant who is a Weekly SBM Responder for 9 of the 12 weeks of the double-blind treatment period, including 3 of the last 4 weeks (Weeks 9, 10, 11 and 12).
12 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change From Baseline of Chronic Opioid-Related Gastrointestinal Symptom Scale (CORGISS) Scores at 12 Weeks
Time Frame: Baseline, 12 weeks
The CORGISS is designed to assess GI symptoms related to opioid use in patients with chronic non-cancer pain. The CORGISS asks participants to rate the severity of GI symptoms over the previous 24 hours, with answers ranging from 0 ("did not experience") to 4 ("very severe").
Baseline, 12 weeks
Overall Complete Spontaneous Bowel Movement (CSBM) Responder Rates at 12 Weeks
Time Frame: 12 weeks
A CSBM Weekly Responder is a subject who has ≥ 3 CSBMs for the specified week and an increase from baseline of ≥1 CSBM for the week. An Overall CSBM Responder is a subject who is a Weekly CSBM Responder for 9 of the 12 weeks of the double-blind treatment period, including 3 of the last 4 weeks (Weeks 9, 10, 11 and 12).
12 weeks

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Adjudicated Cardiovascular, Gastrointestinal and Central Opioid Withdrawal Events
Time Frame: Baseline through 16 weeks

Cardiovascular (CV) events of interested included myocardial infarction, unstable angina, cardiovascular accident, congestive heart failure, serious arrhythmia, resuscitated cardiac arrest, and death.

Gastrointestinal (GI) events of interest included emergency department visits for SAEs of gastroenteritis, hepatitis, pancreatitis, nausea, vomiting, diarrhea, and abdominal pain or cramping.

Central opioid withdrawal events of interest included opioid withdrawal syndrome.

Baseline through 16 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 7, 2013

Primary Completion (Actual)

February 13, 2014

Study Completion (Actual)

February 13, 2014

Study Registration Dates

First Submitted

July 9, 2013

First Submitted That Met QC Criteria

July 15, 2013

First Posted (Estimate)

July 17, 2013

Study Record Updates

Last Update Posted (Actual)

November 15, 2018

Last Update Submitted That Met QC Criteria

October 17, 2018

Last Verified

October 1, 2018

More Information

Terms related to this study

Other Study ID Numbers

  • 2402-004
  • 5945-OIC-12-03 (Other Identifier: Cubist Study Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

https://www.merck.com/clinical-trials/pdf/ProcedureAccessClinicalTrialData.pdf

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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