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A Study to Evaluate the Efficacy and Safety of Controlled Release Arbaclofen Placarbil (XP19986) in Patients With Gastroesophageal Reflux Disease

This study has been completed.
Information provided by (Responsible Party):
Indivior Inc. Identifier:
First received: February 5, 2009
Last updated: September 12, 2016
Last verified: September 2016
The purpose of the study is to evaluate the efficacy and safety of arbaclofen placarbil (XP19986) compared to placebo in patients with gastroesophageal reflux disease.

Condition Intervention Phase
Drug: XP19986 CR
Drug: Placebo for XP19986 CR
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multi-Center, Randomized, Double-Blind, Placebo-Controlled, Two Period Crossover, Single Dose-Finding Study to Assess the Efficacy and Safety of Controlled Release XP19986 in Patients With Gastroesophageal Reflux Disease

Resource links provided by NLM:

Further study details as provided by Indivior Inc.:

Primary Outcome Measures:
  • The primary efficacy assessment endpoint of this study was the total number of reflux episodes (acid and non-acid) comparing study drug to placebo [ Time Frame: 12 hours ]

Secondary Outcome Measures:
  • Reflux episodes (acid and non-acid) during each treatment period at various time intervals, dose/exposure to reflux rate relationship, acid reflux events, non-acid reflux events, and GERD symptoms. [ Time Frame: 12 hours ]

Enrollment: 58
Study Start Date: October 2005
Study Completion Date: August 2006
Primary Completion Date: August 2006 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: XP19986 CR
On either study Day 1 or study Day 5 (after completion of the minimum 3-day washout period), participants received a single dose of XP19986 10, 20, 40 or 60 mg.
Drug: XP19986 CR
Other Name: Eudragit RL 100
Placebo Comparator: Placebo for XP19986 CR
On either study Day 1 or study Day 5 (after completion of the minimum 3-day washout period), participants received a single dose of placebo.
Drug: Placebo for XP19986 CR
Other Name: Sugar Pill


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. History of GERD symptoms (e.g. heartburn episodes) at least 3 times per week
  2. Discontinuation of drugs used to treat GERD (PPIs, H2-blockers) and/or drugs known to cause GERD symptoms (e.g. nonsteroidal anti-inflammatory drugs [NSAIDs]) for 7 days prior to baseline (Visit 2);
  3. Had greater then or equal to 20 postprandial reflux episodes/2 hours recorded using impedance/pH monitoring during Screening/Baseline period (Visit 2)

Exclusion Criteria:

  1. History of gastrointestinal disorders other than GERD that may have significantly affected the assessment of reflux episodes or GERD symptoms (e.g. Barrett's Esophagus, active gastric or duodenal ulcer disease, achalasia, scleroderma, etc.).
  2. Medical conditions that could have affected assessments of reflux episodes or GERD symptoms (e.g. history of nausea and/or vomiting, neurologic/psychiatric disorders, cardiac disease [e.g. angina], lung disease [e.g. asthma, cough], etc.)
  Contacts and Locations
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Please refer to this study by its identifier: NCT00838396

United States, California
Stanford, California, United States, 94305
United States, South Carolina
Charleston, South Carolina, United States, 29425
United States, Washington
Tacoma, Washington, United States, 98403
Sponsors and Collaborators
Indivior Inc.
Study Director: Jay Huff, M.D. XenoPort, Inc.
  More Information

Responsible Party: Indivior Inc. Identifier: NCT00838396     History of Changes
Other Study ID Numbers: XP-B-049
Study First Received: February 5, 2009
Last Updated: September 12, 2016
Individual Participant Data  
Plan to Share IPD: No

Additional relevant MeSH terms:
Gastroesophageal Reflux
Esophageal Motility Disorders
Deglutition Disorders
Esophageal Diseases
Gastrointestinal Diseases
Digestive System Diseases
Arbaclofen placarbil
Muscle Relaxants, Central
Physiological Effects of Drugs
Neuromuscular Agents
Peripheral Nervous System Agents
GABA-B Receptor Agonists
GABA Agonists
GABA Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action processed this record on May 22, 2017