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ClinicalTrials.gov public records Last synced May 21, 2026, 7:09 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 400 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Constipation Clear all
Enrolling by invitation No phase listed Observational
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 May 21, 2026, 7:09 PM EDT
Completed Phase 3 Interventional Results available
View directory record Official record
Conditions
Opioid-Induced Constipation (OIC)
Interventions
NKTR-118, Usual care
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 84 Years
Enrollment
844 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
169
States / cities
Athens, Alabama • Birmingham, Alabama • Huntsville, Alabama + 166 more
Source: ClinicalTrials.gov public record
Updated Oct 19, 2014 · Synced May 21, 2026, 7:09 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Constipation
Interventions
defecography
Procedure
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years to 80 Years · Female only
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 24, 2018 · Synced May 21, 2026, 7:09 PM EDT
Completed No phase listed Observational
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 May 21, 2026, 7:09 PM EDT
Completed Phase 4 Interventional Results available
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 May 21, 2026, 7:09 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Constipation, Cystic Fibrosis
Interventions
lubiprostone
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Apr 17, 2011 · Synced May 21, 2026, 7:09 PM EDT
Withdrawn Not applicable Interventional
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 May 21, 2026, 7:09 PM EDT
Active, not recruiting Phase 2 Interventional
View directory record Official record
Conditions
Autism Spectrum Disorder, Gastro-Intestinal Disorder, Constipation, Diarrhea
Interventions
vancomycin, Miralax, intestinal microbiota, placebo vancomycin, Miralax, placebo intestinal microbiota
Combination Product
Lead sponsor
Arizona State University
Other
Eligibility
5 Years to 17 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 24, 2025 · Synced May 21, 2026, 7:09 PM EDT
Not listed Phase 3 Interventional
View directory record Official record
Conditions
Opioid-induced Constipation
Interventions
Methylnaltrexone Bromide, Placebo-Normal Saline
Drug
Lead sponsor
St. John Health System, Michigan
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Southfield, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 14, 2010 · Synced May 21, 2026, 7:09 PM EDT
Completed Phase 4 Interventional Results available
View directory record Official record
Conditions
Opioid-Induced Constipation
Interventions
Methylnaltrexone, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years and older
Enrollment
237 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
29
States / cities
Mobile, Alabama • Laguna Hills, California • Lancaster, California + 23 more
Source: ClinicalTrials.gov public record
Updated Mar 7, 2018 · Synced May 21, 2026, 7:09 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Prostate Cancer, Kidney Cancer, Constipation
Interventions
Polyethylene Glycol 3350
Drug
Lead sponsor
Chad R. Tracy
Other
Eligibility
30 Years to 100 Years
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 29, 2025 · Synced May 21, 2026, 7:09 PM EDT
Completed Phase 2 Interventional Results available
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 May 21, 2026, 7:09 PM EDT
Terminated Phase 3 Interventional Results available
View directory record Official record
Conditions
Opioid-Induced Constipation
Interventions
NKTR-118, Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
81
States / cities
Huntsville, Alabama • Casa Grande, Arizona • Phoenix, Arizona + 78 more
Source: ClinicalTrials.gov public record
Updated May 31, 2015 · Synced May 21, 2026, 7:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Bowel Movement Regulation, Occasional Constipation, Occasional Diarrhea
Interventions
Bacillus subtilis DE111®
Dietary Supplement
Lead sponsor
Deerland Enzymes
Industry
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Kennesaw, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 9, 2019 · Synced May 21, 2026, 7:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Constipation
Interventions
TD-1211 Dose 1, TD-1211 Dose 2
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
18 Years to 85 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced May 21, 2026, 7:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Constipation
Interventions
ISOThrive Prebiotic Nectar
Dietary Supplement
Lead sponsor
ISOThrive Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Manassas, Virginia
Source: ClinicalTrials.gov public record
Updated May 4, 2022 · Synced May 21, 2026, 7:09 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Constipation
Interventions
Not listed
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
5 Years to 8 Years
Enrollment
1,430 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2010
U.S. locations
11
States / cities
Madison, Wisconsin • Stoughton, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 4, 2015 · Synced May 21, 2026, 7:09 PM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Rectal Hypersensitivity, Irritable Bowel Syndrome-Constipation
Interventions
Sensory Adaptation Training, Escitalopram Therapy
Procedure · Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2019
U.S. locations
2
States / cities
Augusta, Georgia • Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Aug 5, 2020 · Synced May 21, 2026, 7:09 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers
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 May 21, 2026, 7:09 PM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Constipation
Interventions
RM-131, Placebo
Drug
Lead sponsor
Motus Therapeutics, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 22, 2016 · Synced May 21, 2026, 7:09 PM EDT
Enrolling by invitation Not applicable Interventional
View directory record Official record
Conditions
Constipation
Interventions
Survey, Rectal Expulsion Device use
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced May 21, 2026, 7:09 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Constipation
Interventions
Propylene Glycol, Docusate Sodium
Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
20 Years to 90 Years
Enrollment
154 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced May 21, 2026, 7:09 PM EDT
Terminated Phase 2 Interventional Results available
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 May 21, 2026, 7:09 PM EDT
Completed Phase 1 Interventional Results available
View directory record Official record
Conditions
Chronic Constipation, Methanogenesis
Interventions
Lubiprostone, Lubiprostone Control
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
2
States / cities
Iowa City, Iowa • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 14, 2019 · Synced May 21, 2026, 7:09 PM EDT