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 are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 25, 2026, 5:37 PM EDT

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

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Xifaxan 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 22, 2019 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Phase 3 Interventional Results available

Weight Loss in Parkinson's Disease and Role of Small Bowel Bacterial Overgrowth

NCT01662791
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Rifaximin
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 3, 2016 · Synced Sep 25, 2026, 5:37 PM EDT
Withdrawn Phase 2 Interventional

Rifaximin Treatment of Papulopustular Rosacea

NCT01359228
View directory record Official record
Conditions
Rosacea
Interventions
Rifaximin (XIFAXAN), Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 27, 2014 · Synced Sep 25, 2026, 5:37 PM EDT
Terminated Phase 1Phase 2 Interventional

Fecal Microbial Transplant in Pediatric Crohn's Disease

NCT02272868
View directory record Official record
Conditions
Crohn's Disease
Interventions
Fecal Microbial transplant, Normal Saline, rifaximin+omeprazole+miralax
Biological · Drug
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
12 Years to 21 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 28, 2021 · Synced Sep 25, 2026, 5:37 PM EDT
Not listed Phase 2 Interventional

Rifaximin to Modify the Disease Course in Sickle Cell Disease

NCT03719729
View directory record Official record
Conditions
Sickle Cell Disease, Antibiotics
Interventions
Rifaximin
Drug
Lead sponsor
New York Medical College
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Valhalla, New York
Source: ClinicalTrials.gov public record
Updated Mar 13, 2019 · Synced Sep 25, 2026, 5:37 PM EDT
Terminated Phase 2 Interventional Results available

Rifaximin in Patients With Diabetic Gastroparesis

NCT04254549
View directory record Official record
Conditions
Crohn Disease, Diabetic Gastroparesis
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Early Phase 1 Interventional Results available

Role of Methane in Glycemic Control

NCT01638429
View directory record Official record
Conditions
Diabetes, Obesity
Interventions
Neomycin, Rifaximin
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 1, 2019 · Synced Sep 25, 2026, 5:37 PM 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 19, 2026 · Synced Sep 25, 2026, 5:37 PM 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 13, 2019 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Not applicable Interventional Results available

A Clinical Study to Limit Physiologic Intestinal FDG Uptake Uptake on PET-CT Scans

NCT01542541
View directory record Official record
Conditions
Intestinal FDG Uptake
Interventions
Rifaximin
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 12, 2017 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Phase 4 Interventional Results available

Rifaximin Therapy in Chronic Kidney Disease

NCT02342639
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Jason Stubbs, MD
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Nov 4, 2021 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Phase 1 Interventional

Rifaximin in Patients With Monoclonal Gammopathy

NCT03820817
View directory record Official record
Conditions
IgA Monoclonal Gammopathy, IgG Monoclonal Gammopathy, IgM Monoclonal Gammopathy, Light Chain Deposition Disease, Monoclonal Gammopathy, Smoldering Waldenstrom Macroglobulinemia, Waldenstrom Macroglobulinemia, Gammopathy, Monoclonal, Gammopathy Igg
Interventions
Rifaximin
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Early Phase 1 Interventional

Rifaximin for Infection Prophylaxis in Hematopoietic Stem Cell Transplantation

NCT03529825
View directory record Official record
Conditions
Microbial Colonization
Interventions
Rifaximin
Drug
Lead sponsor
Emory University
Other
Eligibility
2 Years to 21 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 11, 2021 · Synced Sep 25, 2026, 5:37 PM 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 21, 2016 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Phase 4 Interventional Results available

The Safety/Efficacy of Rifaximin With/Without Lactulose in Participants With A History of Recurrent Hepatic Encephalopathy

NCT01842581
View directory record Official record
Conditions
Hepatic Encephalopathy, Cirrhosis
Interventions
Rifaximin, Lactulose
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
222 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
43
States / cities
Phoenix, Arizona • Coronado, California • Fresno, California + 35 more
Source: ClinicalTrials.gov public record
Updated Sep 8, 2019 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Phase 1 Interventional

A Pilot Study of Xifaxan to Treat Patients With PSC

NCT01695174
View directory record Official record
Conditions
Primary Sclerosing Cholangitis (PSC)
Interventions
Xifaxan
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 14, 2014 · Synced Sep 25, 2026, 5:37 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Transit Time and Bacterial Overgrowth Using SmartPill Capsule

NCT00577772
View directory record Official record
Conditions
Small Bowel Bacterial Overgrowth, Gastrointestinal Diseases, Stomach Diseases, Digestive System Diseases
Interventions
Xifaxan, SmartPill, Lactulose hydrogen breath test (H_2BT)
Drug · Device · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 4, 2012 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Phase 3 Interventional Results available

Rifaximin and Placebo in the Treatment of Bowel Dysfunction After Anterior Resection for Rectal Cancer

NCT01345175
View directory record Official record
Conditions
Rectal Cancer
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2023
U.S. locations
3
States / cities
Basking Ridge, New Jersey • Commack, New York • New York, New York
Source: ClinicalTrials.gov public record
Updated May 13, 2024 · Synced Sep 25, 2026, 5:37 PM EDT
Terminated Phase 2 Interventional Results available

Rifaximin for the Treatment of Gastrointestinal Toxicities Related to Pertuzumab-Based Therapy in Patients With Stage I-III HER2 Positive Breast Cancer

NCT04249622
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage IB Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, HER2 Positive Breast Carcinoma, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIA Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8
Interventions
Best Practice, Questionnaire Administration, Rifaximin
Other · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced Sep 25, 2026, 5:37 PM EDT
Recruiting Phase 4 Interventional

Rifaximin 200 mg Plus Oral Rehydration vs Oral Rehydration Alone in Children With Acute Diarrhea

NCT07285785
View directory record Official record
Conditions
Diarrhea, Gastroenteritis, Bacterial Infection, Acute Diarrhea
Interventions
Rifaximin 200 mg Tablet, Oral Rehydration Therapy (ORT)
Drug · Other
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
6 Years to 12 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
10
States / cities
Lynwood, California • Hialeah, Florida • Miami, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 25, 2026, 5:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Small Intestinal Bacterial Overgrowth Contribute to Functional Dyspepsia

NCT00956397
View directory record Official record
Conditions
Functional Dyspepsia, Small Intestinal Bacterial Overgrowth, Chronic Abdominal Discomfort
Interventions
Rifaximin, Lactulose Breath Test, Placebo
Drug · Procedure
Lead sponsor
Henry C. Lin, MD
Federal
Eligibility
21 Years and older
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2007
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Oct 23, 2012 · Synced Sep 25, 2026, 5:37 PM 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 9, 2016 · Synced Sep 25, 2026, 5:37 PM EDT
Terminated Phase 2 Interventional Results available

Rifaximin on Visceral Hypersensitivity

NCT03462966
View directory record Official record
Conditions
Visceral Hypersensitivity, Irritable Bowel Syndrome
Interventions
Rifaximin
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 12, 2022 · Synced Sep 25, 2026, 5:37 PM 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 25, 2020 · Synced Sep 25, 2026, 5:37 PM EDT