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Showing 1–24 of 58 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Irritable Bowel Syndrome With Constipation Clear all
Completed Phase 3 Interventional Results available

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

NCT00724126
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
637 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
88
States / cities
Anniston, Alabama • Birmingham, Alabama • Huntsville, Alabama + 83 more
Source: ClinicalTrials.gov public record
Updated Nov 28, 2019 · Synced Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Completed Phase 3 Interventional Results available

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

NCT02493452
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 85 Years
Enrollment
1,135 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
191
States / cities
Birmingham, Alabama • Guntersville, Alabama • Huntsville, Alabama + 157 more
Source: ClinicalTrials.gov public record
Updated Jun 13, 2019 · Synced Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Completed No phase listed Observational

Efficacy of Psychological Therapies in Patients With Functional Bowel Disorders

NCT04060121
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome, Constipation
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 28, 2024 · Synced Jul 21, 2026, 11:35 PM EDT
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 Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Terminated Phase 2 Interventional Results available

Olorinab in Irritable Bowel Syndrome With Predominant Constipation (IBS-C) and Irritable Bowel Syndrome With Predominant Diarrhea (IBS-D)

NCT04043455
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
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
69
States / cities
Birmingham, Alabama • Huntsville, Alabama • Chandler, Arizona + 60 more
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Jul 21, 2026, 11:35 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 Jul 21, 2026, 11:35 PM 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 28, 2019 · Synced Jul 21, 2026, 11:35 PM EDT
Terminated Phase 3 Interventional

The Effect of Tegaserod on Patterns of Flow in the Small Bowel of Patients With Irritable Bowel Syndrome (IBS)

NCT00171431
View directory record Official record
Conditions
Constipation Predominant, Irritable Bowel Syndrome (IBS-C)
Interventions
Tegaserod
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 19, 2012 · Synced Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Completed Phase 3 Interventional Results available

An Open-Label, Long-Term Safety Study of Linaclotide in Patients With Chronic Constipation or Irritable Bowel Syndrome With Constipation

NCT00765999
View directory record Official record
Conditions
Chronic Constipation, Irritable Bowel Syndrome With Constipation
Interventions
Linaclotide
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years and older
Enrollment
1,559 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
110
States / cities
Birmingham, Alabama • Huntsville, Alabama • Chandler, Arizona + 94 more
Source: ClinicalTrials.gov public record
Updated Feb 14, 2019 · Synced Jul 21, 2026, 11:35 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 Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Completed Phase 2 Interventional Results available

A Trial for New Treatment of Adult Participants With Irritable Bowel Syndrome

NCT03721107
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Blautix, Placebo
Biological · Other
Lead sponsor
4D pharma plc
Industry
Eligibility
18 Years to 70 Years
Enrollment
366 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
24
States / cities
Huntsville, Alabama • Phoenix, Arizona • North Hollywood, California + 21 more
Source: ClinicalTrials.gov public record
Updated Jan 10, 2022 · Synced Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Completed Phase 3 Interventional Results available

An Open-label, Long-term Safety Study of Linaclotide in Patients With Chronic Constipation or Irritable Bowel Syndrome With Constipation

NCT00730171
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation, Chronic Constipation
Interventions
Linaclotide
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,743 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
116
States / cities
Birmingham, Alabama • Huntsville, Alabama • Chandler, Arizona + 106 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2018 · Synced Jul 21, 2026, 11:35 PM EDT
Withdrawn Not applicable Interventional

The Impact of Aerobic Interval and Inspiratory Muscle Training On Patient Reported Outcome Scores In Individuals With Chronic Constipation

NCT05321953
View directory record Official record
Conditions
Constipation, Constipation by Outlet Obstruction, Constipation-predominant Irritable Bowel Syndrome, Constipation - Functional
Interventions
Standard Physical Therapy Care, Aerobic and Inspiratory Muscle Training
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated May 11, 2023 · Synced Jul 21, 2026, 11:35 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 Jul 21, 2026, 11:35 PM EDT
Completed Phase 2 Interventional

Safety and Efficacy of AST-120 in Patients With Non-Constipating Irritable Bowel Syndrome

NCT00583128
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
AST-120, Celphere® CP-305
Drug
Lead sponsor
Ocera Therapeutics
Industry
Eligibility
18 Years to 80 Years
Enrollment
117 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
13
States / cities
Huntsville, Alabama • Sacramento, California • San Diego, California + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2014 · Synced Jul 21, 2026, 11:35 PM 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 Jul 21, 2026, 11:35 PM EDT
Recruiting Not applicable Interventional

Low FODMAP Plus PEG 3350 for the Treatment of Patients with Irritable Bowel Syndrome-Constipation

NCT03687814
View directory record Official record
Conditions
Irritable Bowel Syndrome Characterized by Constipation
Interventions
Low FODMAP diet/PEG 3350, sham diet/PEG 3350
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 3, 2025 · Synced Jul 21, 2026, 11:35 PM EDT
Completed Not applicable Interventional Results available

Neomycin and Rifaximin Plus Neomycin in Treating Methane Positive Constipation Predominant Irritable Bowel Syndrome

NCT00945334
View directory record Official record
Conditions
Constipation-predominant Irritable Bowel Syndrome
Interventions
Neomycin, Placebo, Rifaximin
Drug
Lead sponsor
Mark Pimentel, MD
Other
Eligibility
18 Years to 75 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
2
States / cities
Los Angeles, California • Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 9, 2015 · Synced Jul 21, 2026, 11:35 PM EDT