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 Oct 20, 2026, 3:14 PM 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 79 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: rifaximin Clear all
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 Oct 20, 2026, 3:14 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 9, 2019 · Synced Oct 20, 2026, 3:14 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 14, 2019 · Synced Oct 20, 2026, 3:14 PM 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 Oct 20, 2026, 3:14 PM 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 Oct 20, 2026, 3:14 PM 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 Oct 20, 2026, 3:14 PM EDT
Completed Phase 2 Interventional Results available

MNK6106 for Liver Disease (Hepatic Cirrhosis) That in the Past Has Affected the Brain (Hepatic Encephalopathy)

NCT03712280
View directory record Official record
Conditions
Hepatic Cirrhosis, Hepatic Encephalopathy (HE)
Interventions
MNK6106, Rifaximin
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
4
States / cities
Coronado, California • Rialto, California • St. Petersburg, Florida + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 20, 2021 · Synced Oct 20, 2026, 3:14 PM EDT
Recruiting Phase 1Phase 2 Interventional

Rifaximin SSD in Dementia Trial

NCT06718686
View directory record Official record
Conditions
Dementia Alzheimer Type, Dementia Associated With Cerebrovascular Disease
Interventions
Rifaximin SSD 40 mg IR tablet, Placebo
Drug
Lead sponsor
Jasmohan Bajaj
Federal
Eligibility
65 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 20, 2026, 3:14 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Study of Single-Dose Modified Release Glipizide in Healthy Volunteers

NCT05159427
View directory record Official record
Conditions
Human Gastrointestinal Physiology Data
Interventions
Glucotrol XL 5Mg Extended-Release Tablet, Glipizide ER 5 MG 24 HR Extended Release Oral Tablet, Rifaximin 200Mg Tab, 13C6-Glipizide
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Oct 20, 2026, 3:14 PM EDT
Recruiting Phase 2 Interventional

Efficacy and Safety of Oral Rifaximin in Patients With Active Microscopic Colitis

NCT04043897
View directory record Official record
Conditions
Microscopic Colitis
Interventions
Rifaximin 550mg
Drug
Lead sponsor
Eugene F Yen, MD
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 15, 2021 · Synced Oct 20, 2026, 3:14 PM EDT
Not yet recruiting Phase 2 Interventional

Microbiota trAnSplant ThERaPy In hEpatiC Encephalopathy (MASTERPIECE)

NCT07528690
View directory record Official record
Conditions
Hepatic Encephalopathy, Cirrhosis
Interventions
Microbiota transplant therapy (MTT) capsules, Placebo capsule
Biological · Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
21 Years and older
Enrollment
162 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
3
States / cities
West Haven, Connecticut • Dallas, Texas • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Oct 20, 2026, 3:14 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 4, 2016 · Synced Oct 20, 2026, 3:14 PM 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 Oct 20, 2026, 3:14 PM EDT
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 Oct 20, 2026, 3:14 PM EDT
Completed Phase 1Phase 2 Interventional

Study of Rifaximin in Minimal Hepatic Encephalopathy

NCT01069133
View directory record Official record
Conditions
Minimal Hepatic Encephalopathy
Interventions
rifaximin
Drug
Lead sponsor
Hunter Holmes Mcguire Veteran Affairs Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 11, 2012 · Synced Oct 20, 2026, 3:14 PM EDT
Completed Phase 2 Interventional

Induction of Clinical Response Using Rifaximin in Crohn's Disease

NCT00603616
View directory record Official record
Conditions
Crohn's Disease
Interventions
Placebo Comparator, Rifaximin
Drug
Lead sponsor
Scott Lee
Other
Eligibility
18 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 9, 2021 · Synced Oct 20, 2026, 3:14 PM 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 Oct 20, 2026, 3:14 PM EDT
Completed Phase 4 Interventional

Hydrogen Breath Test an Instrument to Predict Rifaximin-Response in Irritable Bowel Syndrome Predominant Diarrhea

NCT03729271
View directory record Official record
Conditions
Irritable Bowel Syndrome, Irritable Bowel Syndrome With Diarrhea
Interventions
Rifaximin, Glucose and lactulose hydrogen breath testing
Drug · Device
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 80 Years
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Oct 20, 2026, 3:14 PM EDT
Completed Not applicable Interventional Results available

Gulf War Digestive Health Study

NCT00680836
View directory record Official record
Conditions
Irritable Bowel Syndrome, Small Intestinal Bacterial Overgrowth
Interventions
Placebo, Rifaximin
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
35 Years to 72 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Aug 29, 2014 · Synced Oct 20, 2026, 3:14 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 20, 2026 · Synced Oct 20, 2026, 3:14 PM EDT
Not listed Phase 4 Interventional

Weight Loss Benefits of Rifaximin in an Intermittent Fasting Diet

NCT04674176
View directory record Official record
Conditions
Weight Loss
Interventions
Rifaximin
Drug
Lead sponsor
Bayhealth Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Dover, Delaware
Source: ClinicalTrials.gov public record
Updated Dec 19, 2020 · Synced Oct 20, 2026, 3:14 PM EDT
Withdrawn Phase 4 Interventional

Rifaximin Versus Lactulose in Renal Failure

NCT00748904
View directory record Official record
Conditions
Liver Cirrhosis, Renal Failure
Interventions
Rifaximin, Lactulose
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 8, 2022 · Synced Oct 20, 2026, 3:14 PM EDT
Terminated Not applicable Interventional

Pilot Study Of The Effect Of Rifaximin On B-Cell Dysregulation In Cirrhosis

NCT01951209
View directory record Official record
Conditions
Liver Cirrhosis, Chronic Hepatitis C
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
David E. Kaplan, MD MSc
Federal
Eligibility
18 Years to 70 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 11, 2021 · Synced Oct 20, 2026, 3:14 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Prevention of Travelers' Diarrhea in Subjects Traveling Outside the U.S.

NCT00328380
View directory record Official record
Conditions
Diarrhea
Interventions
Rifaximin
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
660 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
3
States / cities
South Miami, Florida • Houston, Texas • La Porte, Texas
Source: ClinicalTrials.gov public record
Updated Nov 25, 2019 · Synced Oct 20, 2026, 3:14 PM EDT