Rifaximin 3 Times/Day (TID) for Non-Constipation Irritable Bowel Syndrome (IBS)

ClinicalTrials.gov ID: NCT00731679

Public ClinicalTrials.gov record NCT00731679. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

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ClinicalTrials.gov public records Last synced Jul 22, 2026, 1:50 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 3, Randomized, Double-blind, Placebo-Controlled, Multicenter Study to Assess the Efficacy and Safety of Rifaximin 550 mg TID in the Treatment of Subjects With Non-Constipation Irritable Bowel Syndrome

Study identification

NCT ID: NCT00731679
Recruitment status: Completed
Study type: Interventional
Phase: Phase 3
Lead sponsor: Bausch Health Americas, Inc.; Industry
Enrollment: 623 participants

Conditions and interventions

Conditions

Non-Constipation Irritable Bowel Syndrome

Interventions

Rifaximin Drug
Placebo Drug

Drug

Eligibility (public fields only)

Age range: 18 Years and older
Sex: All
Healthy volunteers: Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date: Jun 30, 2008
Primary completion: Jul 31, 2009
Completion: Aug 31, 2009
Last update posted: Nov 28, 2019

2008 – 2009

United States locations

U.S. sites: 86
U.S. states: 29
U.S. cities: 81

Facility	City	State	ZIP	Site status
Not listed	Hueytown	Alabama	35023	—
Not listed	Phoenix	Arizona	85050	—
Not listed	Sierra Vista	Arizona	85635	—
Not listed	Tucson	Arizona	85741	—
Not listed	Little Rock	Arkansas	72204	—
Not listed	Little Rock	Arkansas	72205	—
Not listed	Sherwood	Arkansas	72120	—
Not listed	Anaheim	California	92801	—
Not listed	Lancaster	California	93534	—
Not listed	Los Angeles	California	90045	—
Not listed	Murrieta	California	92562	—
Not listed	San Diego	California	92108	—
Not listed	Lakewood	Colorado	80215	—
Not listed	Bridgeport	Connecticut	06606	—
Not listed	Torrington	Connecticut	06790	—
Not listed	Altamonte Springs	Florida	32701	—
Not listed	Boynton Beach	Florida	33426	—
Not listed	Gainesville	Florida	32607	—
Not listed	Hollywood	Florida	33021	—
Not listed	Jupiter	Florida	33458	—
Not listed	Lauderdale Lakes	Florida	33319	—
Not listed	Maitland	Florida	32751	—
Not listed	Naples	Florida	34102	—
Not listed	New Port Richey	Florida	34652	—
Not listed	Orlando	Florida	32806	—
Not listed	West Palm Beach	Florida	33409	—
Not listed	Winter Garden	Florida	34787	—
Not listed	Winter Park	Florida	32708	—
Not listed	Topeka	Kansas	66606	—
Not listed	Shreveport	Louisiana	71103	—
Not listed	Baltimore	Maryland	21215	—
Not listed	Hagerstown	Maryland	21742	—
Not listed	Silver Spring	Maryland	20901	—
Not listed	Boston	Massachusetts	02115	—
Not listed	Detroit	Michigan	48235	—
Not listed	Kalamazoo	Michigan	49008	—
Not listed	Paw Paw	Michigan	49079	—
Not listed	Jackson	Mississippi	39202	—
Not listed	St Louis	Missouri	63141	—
Not listed	Lebanon	New Hampshire	03756	—
Not listed	Elizabeth	New Jersey	07202	—
Not listed	Lumberton	New Jersey	08048	—
Not listed	Bayside	New York	11358	—
Not listed	Brooklyn	New York	11214	—
Not listed	New York	New York	10021	—
Not listed	Troy	New York	12180	—
Not listed	Asheboro	North Carolina	27203	—
Not listed	Charlotte	North Carolina	28207	—
Not listed	Durham	North Carolina	27713	—
Not listed	Fayetteville	North Carolina	28304	—
Not listed	Greensboro	North Carolina	27408	—
Not listed	High Point	North Carolina	27262	—
Not listed	Mooresville	North Carolina	28117	—
Not listed	Raleigh	North Carolina	27609	—
Not listed	Salisbury	North Carolina	28144	—
Not listed	Wilmington	North Carolina	28401	—
Not listed	Fargo	North Dakota	58103	—
Not listed	Cincinnati	Ohio	45219	—
Not listed	Cleveland	Ohio	44122	—
Not listed	Columbus	Ohio	43215	—
Not listed	Dayton	Ohio	45440	—
Not listed	Zanesville	Ohio	43701	—
Not listed	Tulsa	Oklahoma	74104	—
Not listed	Portland	Oregon	97210	—
Not listed	Portland	Oregon	97225	—
Not listed	Lancaster	Pennsylvania	17601	—
Not listed	Germantown	Tennessee	38138	—
Not listed	Jackson	Tennessee	38301	—
Not listed	Johnson City	Tennessee	37604	—
Not listed	Nashville	Tennessee	37203	—
Not listed	Austin	Texas	78705	—
Not listed	Fort Worth	Texas	76104	—
Not listed	Houston	Texas	77074	—
Not listed	Houston	Texas	77090	—
Not listed	Pasadena	Texas	77504	—
Not listed	San Antonio	Texas	78215	—
Not listed	San Antonio	Texas	78229	—
Not listed	San Antonio	Texas	78258	—
Not listed	Tyler	Texas	75701	—
Not listed	Ogden	Utah	84405	—
Not listed	West Jordan	Utah	84088	—
Not listed	Chesapeake	Virginia	23320	—
Not listed	Lynchburg	Virginia	24502	—
Not listed	Bellevue	Washington	98004	—
Not listed	Spokane	Washington	99216	—
Not listed	West Bend	Wisconsin	53095	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 10 non-U.S. sites.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT00731679, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do: No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from: Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh: Last update posted Nov 28, 2019 · Synced Jul 22, 2026

Open the official record

The complete protocol, eligibility criteria, and contact information for NCT00731679 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →