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ClinicalTrials.gov public records Last synced Oct 6, 2026, 8:31 AM EDT

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Showing 25–48 of 234 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Irritable Bowel Syndrome (IBS) Clear all
Completed Not applicable Interventional

Implementing a Low FODMAP Diet in Irritable Bowel Syndrome Patients

NCT03948854
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome
Interventions
Registered dietitian, On-line video program, Printed handout, Dietitian-led group
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 14, 2022 · Synced Oct 6, 2026, 8:31 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 Oct 6, 2026, 8:31 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Diet and Motility in IBS

NCT07283341
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS)
Interventions
Wireless Patch System
Diagnostic Test
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
8 Years to 18 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 6, 2026, 8:31 AM EDT
Terminated Phase 1 Interventional

Effect of Olorinab on Gastrointestinal Transit in Patients With Irritable Bowel Syndrome

NCT04655599
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Olorinab, Placebo
Drug
Lead sponsor
Arena Pharmaceuticals
Industry
Eligibility
18 Years to 70 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 17, 2021 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional Results available

Effects of Lubiprostone on Gastrointestinal Transit & pH in Irritable Bowel Syndrome (IBS) With Constipation

NCT01162863
View directory record Official record
Conditions
Irritable Bowel Syndrome, Constipation
Interventions
Lubiprostone, Placebo, Smartpill wireless motility capsule
Drug · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 27, 2017 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional

Mindfulness-Based Eating in Patients With Irritable Bowel Syndrome

NCT02681666
View directory record Official record
Conditions
Abdominal Pain, Irritable Bowel Syndrome, IBS
Interventions
Dietary intervention, Irritable Bowel Syndrome eating awareness training
Dietary Supplement · Behavioral
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 12, 2018 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional

Diet Reintroduction Study in Irritable Bowel Syndrome

NCT03052439
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
FODMAP
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Oct 6, 2026, 8:31 AM EDT
Recruiting Not applicable Interventional

Defining Objective Markers of Compliance for Dietary Therapies in IBS

NCT07494968
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Diet A - elimination diet, Diet B - healthy eating diet
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 65 Years
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Oct 6, 2026, 8:31 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Capsule Microbiota Sampling in IBS/Functional Gastrointestinal Disease

NCT06215222
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome, Healthy, Functional Bloating, Functional Gastrointestinal Disorders
Interventions
Microbiota Sampling
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Redwood City, California
Source: ClinicalTrials.gov public record
Updated Jan 22, 2024 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Phase 3 Interventional Results available

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

NCT00731679
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
623 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
86
States / cities
Hueytown, Alabama • Phoenix, Arizona • Sierra Vista, Arizona + 78 more
Source: ClinicalTrials.gov public record
Updated Nov 29, 2019 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study On The Effect Of GW876008 On Cerebral Blood Flow In Irritable Bowel Syndrome (IBS) Patients And Healthy Volunteers

NCT00376896
View directory record Official record
Conditions
Irritable Colon, Irritable Bowel Syndrome (IBS)
Interventions
GW876008 200mcg, GW876008 20mcg, Placebo
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 16, 2017 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional Results available

Evaluating the Efficacy of the Mediterranean Diet to the Low- Fermentable, Oligosaccharides, Disaccharides, Monosaccharides, and Polyols (FODMAP) Diet in Treating Irritable Bowel Syndrome(IBS)

NCT05807919
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Diet low in all FODMAP groups, Diet - Mediterranean
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 70 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 28, 2025 · Synced Oct 6, 2026, 8:31 AM EDT
Withdrawn Phase 1 Interventional

Efficacy of Combination Therapy vs Placebo for Pediatric Functional Abdominal Pain

NCT01269671
View directory record Official record
Conditions
Functional Abdominal Pain, Irritable Bowel Syndrome, Functional Dyspepsia
Interventions
Melatonin, Peppermint Oil (mentharil), and Simethicone, Sugar pill
Drug · Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
8 Years to 18 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 24, 2015 · Synced Oct 6, 2026, 8:31 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 Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional Results available

Effect of Lubiprostone on Small Bowel Contractions in Female Patients With Constipation Irritable Bowel Syndrome (C-IBS)

NCT01085643
View directory record Official record
Conditions
Constipation-predominant Irritable Bowel Syndrome
Interventions
Lubiprostone, Placebo
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 12, 2011 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Phase 2 Interventional Results available

A Study of MD-7246 to Treat Abdominal Pain in Patients With Diarrhea-predominant Irritable Bowel Syndrome

NCT03931785
View directory record Official record
Conditions
Irritable Bowel Syndrome With Diarrhea (IBS-D)
Interventions
MD-7246, Placebo
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
515 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
80
States / cities
Huntsville, Alabama • Phoenix, Arizona • North Little Rock, Arkansas + 65 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2021 · Synced Oct 6, 2026, 8:31 AM EDT
Recruiting Not applicable Interventional

Home-based Transcutaneous Auricular Vagus Nerve Stimulation (taVNS) for IBS Pain

NCT06847360
View directory record Official record
Conditions
Pain, Chronic, Irritable Bowel Syndrome, Symptom Cluster
Interventions
Home-based taVNS intervention
Device
Lead sponsor
Yale University
Other
Eligibility
18 Years to 29 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Phase 3 Interventional Results available

A 26-Week Study to Evaluate the Efficacy and Safety of Tenapanor in IBS-C

NCT02686138
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
Tenapanor, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
593 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
117
States / cities
Dothan, Alabama • Foley, Alabama • Huntsville, Alabama + 98 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2020 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Phase 2 Interventional Results available

Trial of Linaclotide in Patients With Irritable Bowel Syndrome With Constipation (IBS-C)

NCT02559206
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation
Interventions
Linaclotide, Matching Placebo
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
759 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
71
States / cities
Huntsville, Alabama • Phoenix, Arizona • Tucson, Arizona + 61 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2020 · Synced Oct 6, 2026, 8:31 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Sucrose Breath Test to Determine Intestinal Permeability in IBS

NCT01674088
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Not listed
Lead sponsor
Metabolic Solutions Inc.
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 10, 2014 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional

Stress Management for Irritable Bowel Syndrome

NCT01886027
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Emotional Awareness and Expression Training, Relaxation Training
Behavioral
Lead sponsor
Wayne State University
Other
Eligibility
18 Years to 70 Years
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated May 6, 2015 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Phase 2 Interventional Results available

Effect of Cannabinoid Agonist on Gastrointestinal and Colonic Motor Functions in Patients With Irritable Bowel Syndrome (IBS)

NCT01253408
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Dronabinol, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 7, 2013 · Synced Oct 6, 2026, 8:31 AM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Specimen and Data Collection for a Novel Biomarker Combination for the Differential Diagnosis of Inflammatory Bowel Disease and Irritable Bowel Syndrome.

NCT07471490
View directory record Official record
Conditions
IBD (Inflammatory Bowel Disease), IBS (Irritable Bowel Syndrome), Gastrointestinal Symptoms
Interventions
Not listed
Lead sponsor
DiaSorin Inc.
Industry
Eligibility
2 Years and older
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 13, 2026 · Synced Oct 6, 2026, 8:31 AM EDT
Completed Not applicable Interventional

Irritable Bowel Syndrome and Food Sensitivity

NCT02186743
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Personalized Dietary Advice
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 18, 2017 · Synced Oct 6, 2026, 8:31 AM EDT