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Showing 1–24 of 229 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: IBS (Irritable Bowel Syndrome) Clear all
Completed Not applicable Interventional

Investigation of Linaclotide's Effect on the Bi-directional Brain and Gut Axis in IBS-C Patients

NCT02078323
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Linaclotide, Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 64 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 22, 2018 · Synced Jun 10, 2026, 2:06 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 11, 2026 · Synced Jun 10, 2026, 2:06 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

MAPP Investigation of Pelvic Floor-Brain Neurobiologic Axis in IC/IBS and IBS

NCT01280864
View directory record Official record
Conditions
Interstitial Cystitis, Irritable Bowel Syndrome
Interventions
Not listed
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 22, 2018 · Synced Jun 10, 2026, 2:06 PM 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 5, 2015 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Not applicable Interventional

Use of SBI in IBS Subjects Following a Successful Treatment of Small Intestinal Bacterial Overgrowth

NCT02251483
View directory record Official record
Conditions
Diarrhea Predominant Irritable Bowel Syndrome, Small Intestinal Bacterial Overgrowth
Interventions
Serum-derived bovine immunoglobulin protein isolate (SBI), Placebo
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 28, 2015 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Effects of ROSE-010 on GI Transit in Constipation Predominant Irritable Bowel Syndrome (C-IBS) Patients

NCT01056107
View directory record Official record
Conditions
Irritable Bowel Syndrome Constipation Predominant
Interventions
ROSE-010, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 30, 2013 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Not applicable Interventional

Neuroimaging and Biomarkers in Chronic Visceral Pain

NCT01602575
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Mindfulness based Stress Reduction Training (MBSR)
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 50 Years
Enrollment
119 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 13, 2018 · Synced Jun 10, 2026, 2:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Genetic Contribution of Pain and Inflammation in IBS

NCT01436760
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Not listed
Lead sponsor
University of Florida
Other
Eligibility
Not listed
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 25, 2012 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Results available

Long Term Safety Study of Plecanatide

NCT02706483
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Plecanatide
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 85 Years
Enrollment
2,272 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
204
States / cities
Athens, Alabama • Birmingham, Alabama • Dothan, Alabama + 200 more
Source: ClinicalTrials.gov public record
Updated Aug 17, 2020 · Synced Jun 10, 2026, 2:06 PM 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 17, 2017 · Synced Jun 10, 2026, 2:06 PM 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 9, 2014 · Synced Jun 10, 2026, 2:06 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Study Evaluating the Impact of Regular FODMAP-targeting Digestive Enzyme Blend Use on Gastrointestinal Symptoms in Individuals With Self-Reported Bloating

NCT07591584
View directory record Official record
Conditions
IBS (Irritable Bowel Syndrome), Bloating, Abdominal Pain, Gut Health
Interventions
FODMAP-targeting digestive enzyme blend, Placebo
Dietary Supplement · Other
Lead sponsor
Kiwi Health Inc
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Jun 10, 2026, 2:06 PM 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 26, 2017 · Synced Jun 10, 2026, 2:06 PM EDT
Active, not recruiting Phase 2 Interventional

4-Week, Multi-center Dose-Ranging Study for the IBS-C in Pts. 6 to <12 Yrs

NCT06553547
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Tenapanor, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
6 Years to 11 Years
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
20
States / cities
Little Rock, Arkansas • Hartford, Connecticut • Miami, Florida + 15 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jun 10, 2026, 2:06 PM EDT
Enrolling by invitation No phase listed Observational

Enabling Microbiomics- Driven Personalized Nutrition

NCT06657001
View directory record Official record
Conditions
Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome (IBS), Celiac Disease, Diarrhea, Constipation, Microbiome, Crohn's Disease, UC - Ulcerative Colitis, Microscopic Colitis, Functional Dyspepsia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
4,001 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced Jun 10, 2026, 2:06 PM EDT
Terminated Phase 2 Interventional Results available

A Safety and Efficacy Study of a Range of Linaclotide Doses Administered Orally to Children Ages 7-17 Years, With Irritable Bowel Syndrome With Constipation

NCT02559817
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation
Interventions
Linaclotide Dose A, Linaclotide Dose B, Linaclotide Dose C, Linaclotide Approved Adult Dose, Matching Placebo
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
7 Years to 17 Years
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
46
States / cities
Hot Springs, Arkansas • Little Rock, Arkansas • Anaheim, California + 39 more
Source: ClinicalTrials.gov public record
Updated Dec 27, 2020 · Synced Jun 10, 2026, 2:06 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Gastrointestinal Myoelectric Activity Protocol, the G-Tech EEnG Protocol

NCT01697397
View directory record Official record
Conditions
Gastrointestinal Diseases
Interventions
Recording of Myoelectric Signals
Device
Lead sponsor
G-Tech Corporation
Industry
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Mountain View, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Phase 2 Interventional

A Comparison of the Effects of ORP-101 Versus Placebo in Adult Patients With Irritable Bowel Syndrome With Diarrhea (IBS-D)

NCT04129619
View directory record Official record
Conditions
Irritable Bowel Syndrome With Diarrhea
Interventions
ORP-101, Placebo
Drug
Lead sponsor
OrphoMed, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
321 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
74
States / cities
Birmingham, Alabama • Chandler, Arizona • Phoenix, Arizona + 61 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2022 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Evaluate the Efficacy of Poppi Apple Cider Vinegar Prebiotic Soda to Improve Gut Health In Participants

NCT05418439
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome
Interventions
Drink Poppi Soda
Dietary Supplement
Lead sponsor
Drink Poppi
Industry
Eligibility
18 Years to 45 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Jun 14, 2022 · Synced Jun 10, 2026, 2:06 PM EDT
Terminated Phase 2Phase 3 Interventional Results available

Effect of Ranolazine on Gastrointestinal Motor Function and Pain in Patients With IBS-D

NCT02239926
View directory record Official record
Conditions
Diarrhea Predominant Irritable Bowel Syndrome
Interventions
Ranolazine, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 14, 2016 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Phase 3 Interventional

Study Of Women With Severe Diarrhea-Predominant Irritable Bowel Syndrome Having Failed Conventional Therapy

NCT00067561
View directory record Official record
Conditions
Irritable Colon, Irritable Bowel Syndrome (IBS)
Interventions
Alosetron
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older · Female only
Enrollment
702 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
177
States / cities
Birmingham, Alabama • Calera, Alabama • Tuscaloosa, Alabama + 149 more
Source: ClinicalTrials.gov public record
Updated Apr 15, 2015 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Phase 2 Interventional

Eight-Weeks Of Treatment With Talnetant In Subjects With Irritable Bowel Syndrome (IBS)

NCT00101985
View directory record Official record
Conditions
Irritable Colon
Interventions
talnetant
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
741 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
70
States / cities
Chandler, Arizona • Phoenix, Arizona • North Little Rock, Arkansas + 63 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2015 · Synced Jun 10, 2026, 2:06 PM 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 11, 2021 · Synced Jun 10, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Results available

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

NCT00938717
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation
Interventions
Linaclotide or Matching Placebo
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
805 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
107
States / cities
Birmingham, Alabama • Huntsville, Alabama • Phoenix, Arizona + 97 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2013 · Synced Jun 10, 2026, 2:06 PM EDT