Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Sep 30, 2026, 1:21 AM EDT

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

Showing 1–24 of 29 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: double-blind rifaximin Clear all
Completed Phase 2 Interventional

Dose-ranging Study of Rifaximin Soluble Solid Dispersion (SSD) Tablets for the Prevention of Complications of Early Decompensated Liver Cirrhosis

NCT01904409
View directory record Official record
Conditions
Liver Cirrhosis
Interventions
Placebo, Rifaximin SSD 40 mg IR tablet, Rifaximin SSD 80 mg IR tablet, Rifaximin SSD 40 mg SER tablet, Rifaximin SSD 80 mg SER tablet, Rifaximin SSD 80mgIR/80mgSER tablet
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
113
States / cities
Birmingham, Alabama • Dothan, Alabama • Mobile, Alabama + 94 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Pharmacokinetics and Pharmacodynamics of Rifaximin Novel Formulations in Patients With Sickle Cell Disease

NCT05098028
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Low Dose Rifaximin ER, Low Dose Rifaximin DER, High Dose Rifaximin ER, High Dose Rifaximin DER, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
5
States / cities
Orange, California • Denver, Colorado • Atlanta, Georgia + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Rifaximin Soluble Solid Dispersion (SSD) Tablets Plus Lactulose for the Treatment of Overt Hepatic Encephalopathy (OHE)

NCT03515044
View directory record Official record
Conditions
Overt Hepatic Encephalopathy
Interventions
40 mg Rifaximin SSD once daily, 40 mg Rifaximin SSD twice daily, 80 mg Rifaximin SSD once daily, 80 mg Rifaximin SSD twice daily, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
34
States / cities
Corona del Mar, California • Los Angeles, California • San Francisco, California + 21 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2023 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Efficacy of Rifaximin in Preventing Campylobacteriosis

NCT02280044
View directory record Official record
Conditions
Dysentery, Diarrhea, Enteric Campylobacteriosis
Interventions
Rifaximin intervention, Placebo intervention
Biological
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 3 Interventional Results available

Study Comparing Rifaximin With Xifaxan 200 mg in Traveler's Diarrhea

NCT02498418
View directory record Official record
Conditions
Diarrhea
Interventions
Rifaximin, Xifaxan®, Placebo Tablet
Drug
Lead sponsor
Actavis Inc.
Industry
Eligibility
18 Years and older
Enrollment
739 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated Dec 5, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Not applicable Interventional Results available

Neomycin and Rifaximin Plus Neomycin in Treating Methane Positive Constipation Predominant Irritable Bowel Syndrome

NCT00945334
View directory record Official record
Conditions
Constipation-predominant Irritable Bowel Syndrome
Interventions
Neomycin, Placebo, Rifaximin
Drug
Lead sponsor
Mark Pimentel, MD
Other
Eligibility
18 Years to 75 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
2
States / cities
Los Angeles, California • Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 10, 2015 · Synced Sep 30, 2026, 1:21 AM EDT
Active, not recruiting Phase 3 Interventional

Evaluation of Rifaximin SSD for Delaying Encephalopathy Decompensation in Patients With Cirrhosis

NCT05297448
View directory record Official record
Conditions
Hepatic Encephalopathy
Interventions
Rifaximin SSD, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 85 Years
Enrollment
466 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
90
States / cities
Homewood, Alabama • Chandler, Arizona • Sun City, Arizona + 70 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2025 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Not applicable Interventional Results available

Rifaximin for the Treatment of Persistent Symptoms in Patients With Celiac Disease

NCT01137955
View directory record Official record
Conditions
Celiac Disease
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 29, 2022 · Synced Sep 30, 2026, 1:21 AM EDT
Recruiting Phase 2 Interventional

Efficacy of Rifaximin With NAC in IBS-D

NCT06727422
View directory record Official record
Conditions
IBS (Irritable Bowel Syndrome), IBS-D (Diarrhea-predominant)
Interventions
rifaximin 66mg + N-acetylcysteine 560mg three times daily, RNIB21 containing rifaximin 132mg + N-acetylcysteine 560mg three times daily, Placebo
Drug
Lead sponsor
Mark Pimentel, MD
Other
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 2 Interventional Results available

Safety, Efficacy and Pharmacokinetics of Rifaximin in Patients With Moderate-to-severe Papulopustular Rosacea

NCT05150587
View directory record Official record
Conditions
Papulopustular Rosacea
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Alfasigma S.p.A.
Industry
Eligibility
18 Years and older
Enrollment
216 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
38
States / cities
Yuma, Arizona • Fort Smith, Arkansas • Long Beach, California + 31 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Sep 30, 2026, 1:21 AM EDT
Not listed Phase 2 Interventional

Rifaximin to Prevent Recurrent HCV-Related Fibrosis After Liver Transplant

NCT01603108
View directory record Official record
Conditions
Hepatitis C
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 70 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 22, 2016 · Synced Sep 30, 2026, 1:21 AM EDT
Terminated Phase 3 Interventional Results available

One Year Study of Rifaximin Delayed Release (DR) Tablets in Crohn's Disease

NCT02240121
View directory record Official record
Conditions
Crohn's Disease
Interventions
Rifaximin EIR, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
72
States / cities
Scottsdale, Arizona • Tucson, Arizona • Little Rock, Arkansas + 65 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Terminated Phase 2 Interventional

Efficacy and Safety Study of Rifaximin Vaginal Tablets in Bacterial Vaginosis

NCT02376972
View directory record Official record
Conditions
BACTERIAL VAGINOSIS
Interventions
RIFAXIMIN VAGINAL TABLET 25 MG, RIFAXIMIN VAGINAL TABLET 100 MG, PLACEBO VAGINAL TABLET, METROGEL VAGINAL
Drug
Lead sponsor
Alfasigma S.p.A.
Industry
Eligibility
18 Years to 50 Years · Female only
Enrollment
392 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 10, 2016 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 2 Interventional

Study to Assess the Efficacy and Safety of Rifaximin Administered BID in the Treatment of Patients With Diarrhea-Associated Irritable Bowel Syndrome

NCT00269412
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Rifaximin
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
525 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
67
States / cities
Scottsdale, Arizona • Tempe, Arizona • Anaheim, California + 61 more
Source: ClinicalTrials.gov public record
Updated Nov 25, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Active, not recruiting Phase 3 Interventional

Study to Assess Rifaximin Soluble Solid Dispersion (SSD) for the Delay of Encephalopathy Decompensation in Cirrhosis

NCT05071716
View directory record Official record
Conditions
Hepatic Encephalopathy
Interventions
Rifaximin SSD, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 85 Years
Enrollment
524 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
139
States / cities
Dothan, Alabama • Chandler, Arizona • Peoria, Arizona + 103 more
Source: ClinicalTrials.gov public record
Updated Jul 24, 2025 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 3 Interventional Results available

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

NCT00724126
View directory record Official record
Conditions
Non-Constipation Irritable Bowel Syndrome
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
637 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
88
States / cities
Anniston, Alabama • Birmingham, Alabama • Huntsville, Alabama + 83 more
Source: ClinicalTrials.gov public record
Updated Nov 29, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Terminated Phase 3 Interventional Results available

One Year Study of Rifaximin Delayed Release (DR) in Crohn's Disease

NCT02240108
View directory record Official record
Conditions
Crohn's Disease
Interventions
Rifaximin EIR, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
78
States / cities
Huntsville, Alabama • Tucson, Arizona • Sherwood, Arkansas + 68 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 3 Interventional Results available

Irritable Bowel Syndrome With Diarrhea (IBS-D) Rifaximin Re-Treatment Study

NCT01543178
View directory record Official record
Conditions
Irritable Bowel Syndrome With Diarrhea
Interventions
open-label rifaximin, double-blind placebo, double-blind rifaximin
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
2,583 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
293
States / cities
Anniston, Alabama • Birmingham, Alabama • Dothan, Alabama + 226 more
Source: ClinicalTrials.gov public record
Updated Dec 12, 2017 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Rifaximin for Chronic Immune Activation in People With HIV

NCT01866826
View directory record Official record
Conditions
HIV
Interventions
Rifaximin, Placebo
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
3
States / cities
Bethesda, Maryland • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 26, 2020 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Phase 3 Interventional Results available

A Trial to Compare Xifaxan to Vancomycin for the Treatment of Clostridium Difficile-Associated Diarrhea (CDAD)

NCT00269399
View directory record Official record
Conditions
Clostridium Infections, Diarrhea
Interventions
Rifaximin (Xifaxan), Vancomycin
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
237 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
63
States / cities
Scottsdale, Arizona • Redlands, California • Longmont, Colorado + 54 more
Source: ClinicalTrials.gov public record
Updated Oct 14, 2019 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Not applicable Interventional Results available

Rifaximin in Minimal Hepatic Encephalopathy

NCT00533910
View directory record Official record
Conditions
Hepatic Encephalopathy
Interventions
Rifaximin, placebo
Drug
Lead sponsor
Hunter Holmes Mcguire Veteran Affairs Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 17, 2020 · Synced Sep 30, 2026, 1:21 AM EDT
Terminated Phase 4 Interventional Results available

Efficacy, Safety, And Pharmacokinetics Of Rifaximin In Subjects With Severe Hepatic Impairment And Hepatic Encephalopathy

NCT01846663
View directory record Official record
Conditions
Hepatic Encephalopathy
Interventions
Placebo, Rifaximin
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
28
States / cities
Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 22 more
Source: ClinicalTrials.gov public record
Updated Jan 9, 2024 · Synced Sep 30, 2026, 1:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Trial Evaluating Chemoprophylaxis Against Travelers' Diarrhea - Prevent TD

NCT02498301
View directory record Official record
Conditions
Travelers' Diarrhea, Functional Bowel Disorders, Reactive Arthritis
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Henry M. Jackson Foundation for the Advancement of Military Medicine
Other
Eligibility
18 Years and older
Enrollment
449 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
5
States / cities
San Diego, California • Honolulu, Hawaii • Marine Corps Base Camp Lejeune, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 15, 2023 · Synced Sep 30, 2026, 1:21 AM EDT
Not listed Phase 2 Interventional

The Role of Bacterial Overgrowth and Delayed Intestinal Transit in Hepatic Encephalopathy

NCT00281502
View directory record Official record
Conditions
Hepatic Encephalopathy, Hepatitis C, Liver Cirrhosis
Interventions
Rifaximin (drug)
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 5, 2010 · Synced Sep 30, 2026, 1:21 AM EDT