A Study to Evaluate the Efficacy and Safety of Arbaclofen Placarbil (XP19986) as Adjunctive Therapy in Subjects With Gastroesophageal Reflux Disease (GERD)

NCT ID: NCT00978016

Last Updated: 2021-02-21

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

460 participants

Study Classification

INTERVENTIONAL

Study Start Date

2009-09-30

Study Completion Date

2010-12-31

Brief Summary

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The purpose of the study is to evaluate efficacy and safety of arbaclofen placarbil (XP19986) versus placebo as adjunctive therapy in subjects with troublesome GERD symptoms despite therapy with approved doses of a Proton Pump Inhibitor (PPI).

Detailed Description

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Conditions

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Gastroesophageal Reflux Disease

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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arbaclofen placarbil-Cohort 1

arbaclofen placarbil 20 mg QD with PPI\*

\* Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Group Type EXPERIMENTAL

arbaclofen placarbil-Cohort 1

Intervention Type DRUG

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 20 mg QD) for 7 weeks including titration and taper periods

PPI

Intervention Type DRUG

Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

arbaclofen placarbil-Cohort 2

arbaclofen placarbil 40 mg QD with PPI\*

\* Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Group Type EXPERIMENTAL

arbaclofen placarbil-Cohort 2

Intervention Type DRUG

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 40 mg QD) with for 7 weeks including titration and taper periods

PPI

Intervention Type DRUG

Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

arbaclofen placarbil-Cohort 3

arbaclofen placarbil 20 mg BID with PPI\*

\* Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Group Type EXPERIMENTAL

arbaclofen placarbil-Cohort 3

Intervention Type DRUG

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 20 mg BID) for 7 weeks including titration and taper periods

PPI

Intervention Type DRUG

Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

arbaclofen placarbil-Cohort 4

arbaclofen placarbil 30 mg BID with PPI\*

\* Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Group Type EXPERIMENTAL

arbaclofen placarbil-Cohort 4

Intervention Type DRUG

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 30 mg BID) for 7 weeks including titration and taper periods

PPI

Intervention Type DRUG

Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Placebo-Cohort 5

Placebo dose with PPI\*

\* Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Group Type PLACEBO_COMPARATOR

Placebo-Cohort 5

Intervention Type DRUG

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (placebo) for 7 weeks including titration and taper periods

PPI

Intervention Type DRUG

Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Interventions

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arbaclofen placarbil-Cohort 1

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 20 mg QD) for 7 weeks including titration and taper periods

Intervention Type DRUG

Placebo-Cohort 5

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (placebo) for 7 weeks including titration and taper periods

Intervention Type DRUG

arbaclofen placarbil-Cohort 2

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 40 mg QD) with for 7 weeks including titration and taper periods

Intervention Type DRUG

arbaclofen placarbil-Cohort 3

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 20 mg BID) for 7 weeks including titration and taper periods

Intervention Type DRUG

arbaclofen placarbil-Cohort 4

After the 4 week screening period, eligible subjects will be randomized to adjunctive study treatment (arbaclofen placarbil 30 mg BID) for 7 weeks including titration and taper periods

Intervention Type DRUG

PPI

Allowable PPIs : Rabeprazole Sodium 20 mg QD, Esomeprazole Magnesium 20 mg or 40 mg QD, Lansoprazole 15 mg or 30 mg QD, Pantoprazole 20 mg or 40 mg QD, Omeprazole 20 mg or 40 mg QD, Omeprazole/sodium bicarbonate 20 mg or 40 mg QD, Dexlansoprazole 30 mg or 60 mg QD

Intervention Type DRUG

Other Intervention Names

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XP19986 XP19986 matching placebo XP19986 XP19986 XP19986 Proton Pump Inhibitor

Eligibility Criteria

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Inclusion Criteria

1. confirmed diagnosis of GERD by a gastroenterologist
2. minimum of 3 months of GERD symptoms prior to screening.
3. currently taking an FDA approved dose of PPI therapy for symptomatic GERD for at least 4 weeks prior to screening
4. experienced partial relief of GERD symptoms while receiving approved dose and regimen of PPI therapy
5. experienced GERD symptoms, defined as heartburn (with or without regurgitation or other GERD symptoms) on ≥ 3 days during the week prior to screening

Exclusion Criteria

1. evidence of erosive esophagitis or erosive gastritis on upper gastrointestinal endoscopy during screening
2. has not experienced any GERD symptom improvement after an adequate course of PPI treatment (at least 2 weeks)
3. unstable or severe medical condition
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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XenoPort, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Study Director

Role: STUDY_DIRECTOR

XenoPort, Inc.

Locations

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Huntsville, Alabama, United States

Site Status

Chandler, Arizona, United States

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Mesa, Arizona, United States

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Mesa, Arizona, United States

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Scottsdale, Arizona, United States

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Tucson, Arizona, United States

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Sherwood, Arkansas, United States

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Anaheim, California, United States

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Lancaster, California, United States

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Mission Hills, California, United States

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Sacramento, California, United States

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San Diego, California, United States

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San Diego, California, United States

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Stanford, California, United States

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Westlake Village, California, United States

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Colorado Springs, Colorado, United States

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Lafayette, Colorado, United States

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Lakewood, Colorado, United States

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Littleton, Colorado, United States

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Milford, Connecticut, United States

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Waterbury, Connecticut, United States

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Jupiter, Florida, United States

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Pembroke Pines, Florida, United States

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Atlanta, Georgia, United States

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Clive, Iowa, United States

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Lexington, Kentucky, United States

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Madisonville, Kentucky, United States

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Baton Rouge, Louisiana, United States

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Metairie, Louisiana, United States

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Monroe, Louisiana, United States

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Shreveport, Louisiana, United States

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Annapolis, Maryland, United States

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Hagerstown, Maryland, United States

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Brockton, Massachusetts, United States

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Ann Arbor, Michigan, United States

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Egg Harbor, New Jersey, United States

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Binghamton, New York, United States

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Brooklyn, New York, United States

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Great Neck, New York, United States

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Johnson City, New York, United States

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Lake Success, New York, United States

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Charlotte, North Carolina, United States

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Fayetteville, North Carolina, United States

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Greensboro, North Carolina, United States

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Raleigh, North Carolina, United States

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Fargo, North Dakota, United States

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Columbus, Ohio, United States

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Norman, Oklahoma, United States

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Pittsburgh, Pennsylvania, United States

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Uniontown, Pennsylvania, United States

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Chattanooga, Tennessee, United States

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Germantown, Tennessee, United States

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Bellaire, Texas, United States

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Lake Jackson, Texas, United States

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San Antonio, Texas, United States

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San Antonio, Texas, United States

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Logan, Utah, United States

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Ogden, Utah, United States

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Salt Lake City, Utah, United States

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Charlottesville, Virginia, United States

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Christiansburg, Virginia, United States

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Waukesha, Wisconsin, United States

Site Status

Guelph, Ontario, Canada

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Toronto, Ontario, Canada

Site Status

Countries

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United States Canada

References

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Vakil NB, Huff FJ, Cundy KC. Randomised clinical trial: arbaclofen placarbil in gastro-oesophageal reflux disease--insights into study design for transient lower sphincter relaxation inhibitors. Aliment Pharmacol Ther. 2013 Jul;38(2):107-17. doi: 10.1111/apt.12363. Epub 2013 May 30.

Reference Type DERIVED
PMID: 23721547 (View on PubMed)

Other Identifiers

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XP-B-078

Identifier Type: -

Identifier Source: org_study_id

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