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Showing 1–24 of 77 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Irritable Bowel Syndrome-Constipation Clear all
Completed Phase 4 Interventional

Effect of Tenapanor on the Metagenomics and Metabolomics of Patients With Irritable Bowel Syndrome With Constipation

NCT05995899
View directory record Official record
Conditions
IBS, IBS - Irritable Bowel Syndrome
Interventions
Tenapanor
Drug
Lead sponsor
Kyle Staller, MD, MPH
Other
Eligibility
18 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 11, 2026 · Synced Sep 23, 2026, 9:03 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Abdominal Symptom Phenotype Study in Children

NCT01204515
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS)
Interventions
Not listed
Lead sponsor
Baylor College of Medicine
Other
Eligibility
7 Years to 12 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 5, 2013 · Synced Sep 23, 2026, 9:03 AM EDT
Recruiting No phase listed Observational

Indiana University Gastrointestinal Motility Diagnosis Registry

NCT04506593
View directory record Official record
Conditions
Eosinophilic Esophagitis, Gastroesophageal Reflux Disease (GERD), Gastroparesis, Functional Vomiting, Irritable Bowel Syndrome (IBS), Constipation, Chronic Intestinal Pseudo-obstruction, Fecal Incontinence, Small Intestinal Bacterial Overgrowth
Interventions
no intervention
Other
Lead sponsor
Indiana University
Other
Eligibility
Not listed
Enrollment
5,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Curcumin (Tumeric) in the Treatment of Irritable Bowel Syndrome: A Randomized-Controlled Trial

NCT00779493
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
curcumin, placebo
Dietary Supplement
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 10, 2015 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Safety and Efficacy of RDX5791 for the Treatment of Constipation Predominant Irritable Bowel Syndrome (IBS-C)

NCT01340053
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
RDX5791
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
186 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
16
States / cities
San Diego, California • Jupiter, Florida • Pinellas Park, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Oct 14, 2019 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 3 Interventional Results available

A Phase 3, International, Multicenter, Randomized, Double-blind, Placebo-controlled, Parallel-group Efficacy and Safety Trial of Linaclotide Administered Orally for 12 Weeks to Patients With Irritable Bowel Syndrome With Constipation (IBS-C)

NCT01880424
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Placebo, Linaclotide
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
1,722 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
52
States / cities
Huntsville, Alabama • North Little Rock, Arkansas • Phoenix, Arkansas + 49 more
Source: ClinicalTrials.gov public record
Updated Sep 26, 2016 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 3 Interventional Results available

Linaclotide Safety and Efficacy in Pediatric Participants, 6 to 17 Years of Age, With Irritable Bowel Syndrome With Constipation (IBS-C) or Functional Constipation (FC)

NCT04026113
View directory record Official record
Conditions
Functional Constipation, Irritable Bowel Syndrome With Constipation
Interventions
Linaclotide, Placebo
Drug
Lead sponsor
AbbVie
Industry
Eligibility
6 Years to 17 Years
Enrollment
438 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
79
States / cities
Birmingham, Alabama • Foley, Alabama • Saraland, Alabama + 62 more
Source: ClinicalTrials.gov public record
Updated Nov 25, 2024 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 4 Interventional Results available

Pregabalin on Colonic Motor and Sensory Function in Constipation Predominant Irritable Bowel Syndrome

NCT01331213
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Pregabalin, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 2, 2014 · Synced Sep 23, 2026, 9:03 AM EDT
Terminated Phase 2 Interventional Results available

Efficacy and Safety of SYN-010 in IBS-C

NCT03763175
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation
Interventions
SYN-010 21 mg, SYN-010 42 mg, Placebo
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 12, 2022 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Not applicable Interventional Results available

The Effect of CSP01 on Chronic Idiopathic Constipation and Irritable Bowel Syndrome With Constipation

NCT03054506
View directory record Official record
Conditions
Constipation, Chronic Idiopathic Constipation, Irritable Bowel Syndrome With Constipation
Interventions
CSP01, Carboxymethylcellulose (CMC), Placebo
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
22 Years to 70 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 19, 2019 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional Results available

The Plecanatide Irritable Bowel Syndrome With Constipation Study (IBS-C)

NCT01722318
View directory record Official record
Conditions
Irritable Bowel Syndrome Characterized by Constipation
Interventions
Plecanatide, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
428 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
99
States / cities
Birmingham, Alabama • Dothan, Alabama • Glendale, Arizona + 83 more
Source: ClinicalTrials.gov public record
Updated May 27, 2019 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional Results available

A Study of the Effect of SYN-010 on Subjects With IBS-C

NCT02495623
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
SYN-010 21 mg, SYN-010 42 mg, Placebo
Drug
Lead sponsor
Theriva Biologics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Nov 26, 2018 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 4 Interventional Results available

An Open-Label, Long-term Study to Assess the Immunogenicity of LINZESS® (Linaclotide) Administered Orally to Adult Participants With Irritable Bowel Syndrome With Constipation or Chronic Idiopathic Constipation

NCT02590432
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation, Chronic Idiopathic Constipation
Interventions
Linaclotide
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
828 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
79
States / cities
Anniston, Alabama • Athens, Alabama • Childersburg, Alabama + 69 more
Source: ClinicalTrials.gov public record
Updated Aug 21, 2019 · Synced Sep 23, 2026, 9:03 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 26, 2017 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional Results available

A Single-Dose, Open-Label, Study to Evaluate the Sustainability of the Effects of SYN-010 in Patients With IBS-C

NCT02493036
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
SYN-010
Drug
Lead sponsor
Theriva Biologics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
11
States / cities
Hialeah, Florida • Miami, Florida • Miami Lakes, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Nov 26, 2018 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 3 Interventional Results available

A Long-Term Safety Study of Tenapanor for the Treatment of IBS-C

NCT02727751
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
Tenapanor
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
312 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 8, 2020 · Synced Sep 23, 2026, 9:03 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Biomarkers for Intestinal Permeability in Patients With Constipation

NCT02246647
View directory record Official record
Conditions
Intestinal Diseases, Irritable Bowel Syndrome, Constipation
Interventions
Permeability measurement, Esophagogastroduodenoscopy, Flexible sigmoidoscopy
Diagnostic Test · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 20, 2019 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 3 Interventional Results available

Long-term Safety of Linaclotide in Pediatric Participants With FC or IBS-C

NCT04166058
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation, Functional Constipation
Interventions
Irritable Bowel Syndrome with Constipation (IBS-C) participants (LIN-MD-63 and LIN-MD-64 completers), Functional Constipation (FC) participants (LIN-MD-62 and LIN-MD-64 completers)
Drug
Lead sponsor
AbbVie
Industry
Eligibility
6 Years to 18 Years
Enrollment
381 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
65
States / cities
Birmingham, Alabama • Foley, Alabama • Saraland, Alabama + 50 more
Source: ClinicalTrials.gov public record
Updated Jan 5, 2026 · Synced Sep 23, 2026, 9:03 AM EDT
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 Sep 23, 2026, 9:03 AM EDT
Completed No phase listed Observational

Fecal Calprotectin Collection Protocol

NCT03143517
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Irritable Bowel Syndrome, Ulcerative Colitis, Crohn Disease, Indeterminate Colitis, Chronic Diarrhea, Celiac Disease, Diverticulitis, Abdominal Pain, Distension, Weight Loss, Food Intolerance, Constipation
Interventions
Stool collection
Diagnostic Test
Lead sponsor
DiaSorin Inc.
Industry
Eligibility
4 Years and older
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
13
States / cities
Dothan, Alabama • Little Rock, Arkansas • Mission Hills, California + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 6, 2019 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional Results available

Study to Evaluate the Efficacy and Safety of Vibegron Administered Orally for 12 Weeks to Women With Irritable Bowel Syndrome

NCT03806127
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Vibegron, Placebo
Drug
Lead sponsor
Urovant Sciences GmbH
Industry
Eligibility
18 Years to 70 Years · Female only
Enrollment
222 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
41
States / cities
Birmingham, Alabama • Huntsville, Alabama • Mobile, Alabama + 35 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2021 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional Results available

Randomized, Double-blind, Dose-range-finding, Phase 2 Study of Linaclotide Administered to Patients With Irritable Bowel Syndrome With Constipation (IBS-C)

NCT00460811
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation
Interventions
Linaclotide Acetate, Matching placebo
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
79
States / cities
Huntsville, Alabama • Chandler, Arizona • Tuscon, Arizona + 76 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2013 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 3 Interventional

Study to Assess Safety and Efficacy of Tenapanor for Treatment of IBS-C in Pediatric Patients 12 to Less Than 18 Years

NCT05643534
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation (IBS-C)
Interventions
Tenapanor 50 MG, Tenapanor 25 mg bid, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
12 Years to 17 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
39
States / cities
Foley, Alabama • Tucson, Arizona • Little Rock, Arkansas + 34 more
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Sep 23, 2026, 9:03 AM EDT
Completed Phase 2 Interventional

Phase 2 Study of MD-1100 Acetate on Gastrointestinal Transit in Patients With C-IBS

NCT00258193
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
MD-1100 Acetate
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 19, 2006 · Synced Sep 23, 2026, 9:03 AM EDT