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Showing 25–43 of 19 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Irritable Bowel Syndrome (IBS-C) Clear all
Terminated Phase 3 Interventional

Long-Term Safety of Renzapride in Women With Constipation-Predominant Irritable Bowel Syndrome (IBS-C)

NCT00607971
View directory record Official record
Conditions
Constipation-Predominant Irritable Bowel Syndrome
Interventions
Renzapride
Drug
Lead sponsor
Alizyme
Industry
Eligibility
18 Years and older · Female only
Enrollment
939 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
126
States / cities
Huntsville, Alabama • Chandler, Arizona • Phoenix, Arizona + 112 more
Source: ClinicalTrials.gov public record
Updated Jul 7, 2008 · Synced Jul 23, 2026, 11:09 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 16, 2021 · Synced Jul 23, 2026, 11:09 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 Jul 23, 2026, 11:09 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 23, 2020 · Synced Jul 23, 2026, 11:09 AM EDT
Withdrawn Phase 2 Interventional

Botanical Tincture for Symptoms of Irritable Bowel Syndrome

NCT03923322
View directory record Official record
Conditions
Irritable Bowel Syndrome Characterized by Constipation
Interventions
Botanical Tincture, Placebo
Drug · Other
Lead sponsor
Stamford Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Stamford, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 28, 2024 · Synced Jul 23, 2026, 11:09 AM 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 Jul 23, 2026, 11:09 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 Jul 23, 2026, 11:09 AM 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 23, 2026, 11:09 AM EDT
Completed Phase 3 Interventional Results available

A 12-Week Study With a 4-Week Randomized Withdrawal Period to Evaluate the Efficacy and Safety of Tenapanor for the Treatment of IBS-C

NCT02621892
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
606 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
111
States / cities
Birmingham, Alabama • Huntsville, Alabama • Chandler, Arizona + 92 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2020 · Synced Jul 23, 2026, 11:09 AM EDT
Completed Phase 2Phase 3 Interventional Results available

The Efficacy of AZD1722 in Constipation Predominant Irritable Bowel Syndrome (IBS-C)

NCT01923428
View directory record Official record
Conditions
Constipation Predominant Irritable Bowel Syndrome
Interventions
AZD1722, Placebo
Drug
Lead sponsor
Ardelyx
Industry
Eligibility
18 Years to 75 Years
Enrollment
356 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
4
States / cities
Boulder, Colorado • Greensboro, North Carolina • Winston-Salem, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 7, 2020 · Synced Jul 23, 2026, 11:09 AM EDT
Completed Phase 3 Interventional Results available

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

NCT02387359
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
1,054 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
155
States / cities
Athens, Alabama • Birmingham, Alabama • Dothan, Alabama + 142 more
Source: ClinicalTrials.gov public record
Updated Jun 13, 2019 · Synced Jul 23, 2026, 11:09 AM EDT
Active, not recruiting 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 Jun 3, 2026 · Synced Jul 23, 2026, 11:09 AM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety of Plecanatide in Children 6 to <18 Years With Irritable Bowel Syndrome With Constipation (IBS-C)

NCT03596905
View directory record Official record
Conditions
Irritable Bowel Syndrome With Constipation
Interventions
Plecanatide, Matching placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
6 Years to 18 Years
Enrollment
218 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
35
States / cities
Saraland, Alabama • Scottsdale, Arizona • Corona, California + 28 more
Source: ClinicalTrials.gov public record
Updated Dec 30, 2025 · Synced Jul 23, 2026, 11:09 AM 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 Jul 23, 2026, 11:09 AM EDT
Completed Phase 3 Interventional Results available

A Trial of Linaclotide 290 μg in Patients With Irritable Bowel Syndrome With Constipation (IBS-C)

NCT03573908
View directory record Official record
Conditions
Irritable Bowel Syndrome Characterized by Constipation
Interventions
Linaclotide, Placebo
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
614 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
79
States / cities
Huntsville, Alabama • Phoenix, Arizona • Tucson, Arizona + 67 more
Source: ClinicalTrials.gov public record
Updated Nov 30, 2020 · Synced Jul 23, 2026, 11:09 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 Jul 23, 2026, 11:09 AM 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 23, 2026, 11:09 AM EDT
Not yet recruiting Not applicable Interventional

Trans Auricular Vagal Nerve Stimulation in Patients With IBS-C

NCT07662083
View directory record Official record
Conditions
Irritable Bowel Syndrome (IBS-C)
Interventions
Transcutaneous Auricular Vagus Nerve Stimulation (ta-VNS), Sham Transcutaneous Auricular Vagus Nerve Stimulation
Device
Lead sponsor
West Virginia University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Jul 23, 2026, 11:09 AM 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 23, 2026, 11:09 AM EDT