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Showing 1–24 of 300 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Gastrointestinal Irritation Clear all
Completed Phase 2 Interventional

Recurrent Abdominal Pain in Children

NCT00526903
View directory record Official record
Conditions
Abdominal Pain, Irritable Bowel Syndrome
Interventions
Elimination Diet
Behavioral
Lead sponsor
Baylor College of Medicine
Other
Eligibility
7 Years to 18 Years
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 7, 2016 · Synced Jul 22, 2026, 11:10 PM EDT
Not listed Phase 2Phase 3 Interventional

A Study of the Safety and Effectiveness of DDP733 in Treating IBS With Constipation in Females

NCT00547469
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
DDP733
Drug
Lead sponsor
Dynogen Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
62
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 53 more
Source: ClinicalTrials.gov public record
Updated Apr 7, 2008 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional

Endpoint Determination Study Protocol

NCT03459482
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Food Elimination Diet
Other
Lead sponsor
Biomerica
Industry
Eligibility
21 Years and older
Enrollment
556 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
8
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Wauconda, Illinois + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 4, 2024 · Synced Jul 22, 2026, 11:10 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effects of a Postbiotic Supplement on Biomarkers of Gut Health

NCT07527286
View directory record Official record
Conditions
Gastrointestinal, Microbiota Balance, Microbiota, Cortisol, Butyrate, Bloating, Gastrointestinal Upset, Immuno-modulation
Interventions
Postbiotic
Dietary Supplement
Lead sponsor
Verb Biotics LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Canfield, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Jul 22, 2026, 11:10 PM EDT
Terminated Phase 2 Interventional Results available

Safety and Efficacy of Oral AGN 203818 for the Relief of Irritable Bowel Syndrome Pain

NCT00441766
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
AGN 203818, placebo
Drug
Lead sponsor
Allergan
Industry
Eligibility
18 Years and older · Female only
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Jan 19, 2012 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Phase 3 Interventional Results available

Efficacy, Safety, and Tolerability of Eluxadoline in the Treatment of Participants With Diarrhea-Predominant Irritable Bowel Syndrome (IBS-d)

NCT01553747
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Eluxadoline, Placebo
Drug
Lead sponsor
Furiex Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 80 Years
Enrollment
1,146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
232
States / cities
Birmingham, Alabama • Decatur, Alabama • Huntsville, Alabama + 189 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2018 · Synced Jul 22, 2026, 11:10 PM 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 12, 2026 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Food-effect, Drug-Drug Interaction (DDI), and Formulation Bridging Study

NCT03555617
View directory record Official record
Conditions
Inflammatory Bowel Disease
Interventions
TD-1473, Itraconazole
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
19 Years to 55 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Phase 3 Interventional Results available

Efficacy, Safety, and Tolerability of Eluxadoline in the Treatment of Participants With Diarrhea-Predominant Irritable Bowel Syndrome (IBS-d)

NCT01553591
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Eluxadoline, Placebo
Drug
Lead sponsor
Furiex Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 80 Years
Enrollment
1,282 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
257
States / cities
Athens, Alabama • Birmingham, Alabama • Foley, Alabama + 214 more
Source: ClinicalTrials.gov public record
Updated Sep 3, 2018 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional Results available

Self Administered Cognitive Behavior Therapy for Irritable Bowel Syndrome

NCT00738920
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Self Administered Cognitive Behavior Therapy, Therapist Administered Cognitive Behavior Therapy, Behavioral Education and Supportive Therapy
Behavioral
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years to 70 Years
Enrollment
436 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
2
States / cities
Chicago, Illinois • Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2022 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional

Serum-Derived Bovine Immunoglobulin /Protein Isolate (SBI) 5.0 g Bid on Nutritional Status in Subjects With IBS-D

NCT02163213
View directory record Official record
Conditions
Diarrhea-predominant Irritable Bowel Syndrome
Interventions
Serum-derived bovine immunoglobulin protein isolate (SBI)
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 17, 2017 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Phase 3 Interventional Results available

Trial of Linaclotide Administered to Patients With Irritable Bowel Syndrome With Constipation

NCT00948818
View directory record Official record
Conditions
Irritable Bowel Syndrome Characterized by Constipation
Interventions
Linaclotide 290 micrograms, Matching placebo
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
803 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
111
States / cities
Birmingham, Alabama • Hueytown, Alabama • Huntsville, Alabama + 94 more
Source: ClinicalTrials.gov public record
Updated Jan 29, 2013 · Synced Jul 22, 2026, 11:10 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 Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional

Effect of Repetitive Transcranial Direct Current Stimulation (tDCS) on Chronic Pelvic Pain

NCT00554320
View directory record Official record
Conditions
Chronic Pelvic Pain, Interstitial Cystitis, Post Traumatic Stress Disorder, Fibromyalgia, Irritable Bowel Syndrome
Interventions
tDCS
Procedure
Lead sponsor
Summa Health System
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Akron, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 17, 2009 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Evaluate the Efficacy of Arrae's Bloat & Calm Alchemy Capsules to Reduce Bloating, Heartburn and Gas, and Alleviate the Intensity of IBS Symptoms

NCT05197413
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome, Anxiety
Interventions
Arrae bloat supplement
Dietary Supplement
Lead sponsor
Arrae
Industry
Eligibility
18 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Jul 22, 2026, 11:10 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of Gulf War Illness (GWI) by Comparing GWI and Healthy Veterans

NCT00810225
View directory record Official record
Conditions
Gulf War Illness, Persian Gulf War Syndrome
Interventions
Not listed
Lead sponsor
Georgetown University
Other
Eligibility
Not listed
Enrollment
516 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 17, 2018 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Phase 3 Interventional Results available

12-Week Efficacy and Safety Study of Ibodutant in Women With Irritable Bowel Syndrome With Diarrhea (IBS-D)

NCT02107196
View directory record Official record
Conditions
Irritable Bowel Syndrome With Diarrhea
Interventions
Ibodutant 10 mg, Placebo
Drug
Lead sponsor
Menarini Group
Industry
Eligibility
18 Years and older · Female only
Enrollment
535 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
65
States / cities
Huntsville, Alabama • Sherwood, Arizona • Little Rock, Arkansas + 56 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2017 · Synced Jul 22, 2026, 11:10 PM EDT
Terminated Phase 1 Interventional

Pilot Study to Assess the Effects of AV608 on Irritable Bowel Syndrome

NCT00316550
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS)
Interventions
AV608
Drug
Lead sponsor
Avera Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 24, 2008 · Synced Jul 22, 2026, 11:10 PM EDT
Not listed No phase listed Observational

Genetics of Fibromyalgia

NCT00071162
View directory record Official record
Conditions
Fibromyalgia, Irritable Bowel Syndrome, Chronic Fatigue Syndrome, Depression
Interventions
Not listed
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
12 Years and older
Enrollment
560 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1999
U.S. locations
4
States / cities
Peoria, Illinois • Cincinnati, Ohio • Cleveland, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 31, 2009 · Synced Jul 22, 2026, 11:10 PM EDT
Recruiting No phase listed Observational

Prospective Observational Study of Naturopathic Approaches to IBS

NCT06721624
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS)
Interventions
Naturopathic medicine
Other
Lead sponsor
National University of Natural Medicine
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional

Effect of HMOs as Nutritional Support for Normal Bowel Movements in IBS Patients

NCT03550742
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS)
Interventions
Fuco-N-Tetraose
Other
Lead sponsor
Glycom, Inc.
Industry
Eligibility
18 Years and older
Enrollment
317 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 24, 2019 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Not applicable Interventional Results available

Clinical Study Comparing PillCam® Crohn's Capsule Endoscopy to Ileocolonoscopy (IC) Plus MRE for Detection of Active CD in the Small Bowel and Colon in Subjects With Known CD and Mucosal Disease.

NCT03241368
View directory record Official record
Conditions
Crohn Disease
Interventions
Capsule Endoscopy
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
187 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
24
States / cities
Mobile, Alabama • Scottsdale, Arizona • Jacksonville, Florida + 20 more
Source: ClinicalTrials.gov public record
Updated Jun 8, 2020 · Synced Jul 22, 2026, 11:10 PM EDT
Completed Phase 2 Interventional

Diarrhea Predominant Irritable Bowel Syndrome in Females

NCT00461526
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
crofelemer
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
43
States / cities
Huntsville, Alabama • Chandler, Arizona • Tucson, Arizona + 36 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2019 · Synced Jul 22, 2026, 11:10 PM EDT
Not yet recruiting Early Phase 1 Interventional

Use of A Complex Gut Bacterial Consortium (MITI 001) for the Treatment of Irritable Bowel Syndrome With Diarrhea

NCT07238790
View directory record Official record
Conditions
IBS (Irritable Bowel Syndrome), Diarrhea
Interventions
MITI-001 administration
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
2
States / cities
Redwood City, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 19, 2025 · Synced Jul 22, 2026, 11:10 PM EDT