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ClinicalTrials.gov 15 recruiting now official registry

Constipation clinical trials

15 of 55 indexed Constipation trials are currently recruiting.

55 US clinical trials · 15 currently recruiting

Constipation is the subject of 55 registered US clinical trials on ClinicalTrials.gov, 15 of them currently open to new participants. 16 are in Phase 3-4 (later-stage) and 13 in Phase 1-2 (earlier-stage). The most active sponsor is Mayo Clinic, running 5 of these trials.

The research picture

Constipation has 55 registered US clinical trials, 15 of them open to new participants right now, about 27% of the total.

15
recruiting participants now
27%
of trials open to enrollment
16
in Phase 3–4 (later-stage)
5
top sponsor: Mayo Clinic
Phase 15Phase 28Phase 36Phase 410

Active & Recent Trials

55 total, page 1 of 2

RECRUITING 5,000 participants

Indiana University Gastrointestinal Motility Diagnosis Registry

Indiana University

NCT04506593

RECRUITING Phase 4 240 participants

Preop Laxatives in Robotic Urologic Surgery

Chad R. Tracy

NCT05805436

RECRUITING NA 200 participants

Management of Dyssynergic Defecation

Mayo Clinic

NCT07225803

RECRUITING NA 160 participants

Understanding Mechanisms of Normal and Disordered Defecation

Mayo Clinic

NCT03842007

RECRUITING NA 88 participants

Optimization of Postoperative Bowel Habits

Wake Forest University Health Sciences

NCT06335797

RECRUITING Phase 4 74 participants

Pre-operative Polyethylene Glycol 3350 for Minimally Invasive Urogynecologic Surgery

University Hospitals Cleveland Medical Center

NCT06159777

RECRUITING NA 70 participants

A Study of Herbal Supplements in Cancer Survivors With Constipation

Memorial Sloan Kettering Cancer Center

NCT07091084

RECRUITING Phase 4 65 participants

Evaluation of Fecal Microbiome Changes After Antegrade Continence Enema Placement and Initiation of Bowel Flush Regimen

Indiana University

NCT05821309

RECRUITING NA 60 participants

Interrogating the Pathophysiological Mechanisms of Constipation in Patients With Systemic Sclerosis

The University of Texas Health Science Center, Houston

NCT05989763

RECRUITING NA 30 participants

Impact of Weizmannia (Bacillus) Coagulans JBI-YZ6.3 on Gut Health and Fecal Microbiome Changes

Lindenwood University

NCT07388264

RECRUITING NA 30 participants

Impact of the Inno Cleanse Dietary Supplement on Gut Health and Associated Variables in Healthy Men and Women

University of Memphis

NCT07215351

RECRUITING Phase 3 25 participants

Assessing Tenapanor as a Treatment of CF-related Constipation.

Massachusetts General Hospital

NCT06810167

RECRUITING NA 24 participants

Fecobionics in Biofeedback Therapy in Dyssynergia Patients

The California Medical Innovations Institute

NCT05807321

RECRUITING Phase 2 21 participants

A Study of Microbiome Transplantation for the Treatment of Constipation and/or Significant Bloating in Patients With Systemic Sclerosis

The University of Texas Health Science Center, Houston

NCT06827977

RECRUITING Phase 2 16 participants

Pyridostigmine for the Treatment of Constipation in Parkinson Disease

University of Vermont Medical Center

NCT05603715

ACTIVE NOT RECRUITING 100 participants

A Study to Assess Maternal and Fetal Outcomes After Taking Prucalopride During Pregnancy

Takeda

NCT04961840

ACTIVE NOT RECRUITING Phase 1 100 participants

Efficacy of Non-weight Based, Low Dose Dex-Dex Adjuncts in Prolonging Peripheral Nerve Blocks

University of Arizona

NCT07099222

ACTIVE NOT RECRUITING Phase 2 85 participants

Use of a Squatting Assist Device in Patients With Constipation

Mayo Clinic

NCT02877394

ACTIVE NOT RECRUITING Phase 2 60 participants

Microbiota Transplant Therapy for Children With Both Autism Spectrum Disorder and Gastrointestinal Disorders

Gut-Brain-Axis Therapeutics

NCT06503978

ACTIVE NOT RECRUITING Phase 2 50 participants

MTT for Children With ASD Who Have Gastrointestinal Disorders

Arizona State University

NCT04182633

ACTIVE NOT RECRUITING Phase 3 6 participants

Neostigmine and Glycopyrrolate by Iontophoresis

James J. Peters Veterans Affairs Medical Center

NCT06351995

COMPLETED Phase 3 1,040 participants

Study Evaluating Long-Term Safety of MOA-728 in Participants With Opioid-Induced Constipation

Bausch Health Americas

NCT00804141

COMPLETED Phase 3 518 participants

Treatment Of Constipation Due To Opioids Being Taken For Persistent Non-Cancer Pain

Cubist Pharmaceuticals LLC, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)

NCT00256932

COMPLETED Phase 3 330 participants

An Open Label Study of Chronic Use of BLI400 Laxative in Constipated Adults

Braintree Laboratories

NCT02819310

COMPLETED Phase 4 300 participants

Extended Use of Polyethyleneglycol3350 Laxative in Constipated Patients

Braintree Laboratories

NCT00153153

COMPLETED Phase 4 300 participants

An Open Label Study of Chronic Polyethyleneglycol3350 Use in Constipated Patients

Braintree Laboratories

NCT00164125

COMPLETED Phase 3 300 participants

Treatment of Functional Bowel Disorders

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

NCT00006157

COMPLETED NA 255 participants

Development and Validation of the Automated Evaluation of Gastrointestinal Symptoms (AEGIS) Platform

Cedars-Sinai Medical Center

NCT02436057

COMPLETED Phase 2 151 participants

Orally Administered ENT-01 for Parkinson's Disease-Related Constipation (KARMET)

Enterin

NCT03781791

COMPLETED Phase 4 127 participants

Safety and Efficacy of Lubiprostone in Pediatric Patients With Constipation

Sucampo Pharma Americas

NCT00452335

COMPLETED NA 109 participants

Guideline to Implementation: A Rapid Clinical Care Pathway to Care for Patients Affected by Chronic Constipation

University of Michigan

NCT06352827

COMPLETED NA 106 participants

Open Label Tolerability Study of ISOThrive Prebiotic Nectar (MIMO) in Subjects With Constipation

ISOThrive

NCT04677634

COMPLETED 101 participants

ISE to Support Constipation Management

Children's Hospital Medical Center, Cincinnati

NCT02977858

COMPLETED Phase 4 100 participants

Comparison of PolyethyleneGlycol and Placebo for Relief of Constipation From Constipating Medications

Braintree Laboratories

NCT00153127

COMPLETED NA 100 participants

Perineal Self-Acupressure

University of California, Los Angeles

NCT01867944

COMPLETED NA 84 participants

Effect of Preoperative Fiber on Postoperative Bowel Function

University of Massachusetts, Worcester

NCT04882995

COMPLETED 80 participants

Sierra High Definition Ano-Rectal Manometry

Augusta University

NCT01300884

COMPLETED NA 64 participants

Tolerability and Functional Assessment of a Novel Children's Synbiotic

Seed Health

NCT04534036

COMPLETED NA 53 participants

Fiber Regimens for Constipation Symptoms

University of Texas Southwestern Medical Center

NCT03845673

COMPLETED Phase 4 52 participants

Preference of Tegaserod vs. PEG 3350 in Patients With Constipation

Novartis

NCT00171522

COMPLETED NA 52 participants

A Probiotic Blend Reduces Gastrointestinal Symptoms and Positively Impacts Microbiota Modulation in a Randomized Study

The Center for Applied Health Sciences

NCT05614726

COMPLETED Phase 1 50 participants

Evaluation of Safety and Tolerability of ENT-01 for the Treatment of Parkinson's Disease Related Constipation

Enterin

NCT03047629

COMPLETED Phase 4 50 participants

Study to Gather Information on the Acceptability of a New Flavor System With Increasing Levels of 2, 4, 6 g or Higher of Mannitol for PEG 3350 in Subjects Having Infrequent Bowel Movements.

Bayer

NCT04534465

COMPLETED Phase 2 48 participants

Phase 2 Study to Evaluate Safety and Efficacy of RM-131 Administered to Patients With Chronic Constipation

Motus Therapeutics

NCT01781104

COMPLETED Phase 1 48 participants

Study Evaluating the Safety of MOA-728 Administered Orally to Healthy Subjects

Bausch Health Americas

NCT00311350

COMPLETED 39 participants

Biomarkers for Intestinal Permeability in Patients With Constipation

Mayo Clinic

NCT02246647

COMPLETED 30 participants

AcuGraph and Digestive Symptoms

Logan College of Chiropractic

NCT00846794

COMPLETED Phase 4 21 participants

Lubiprostone in Patients With Multiple Sclerosis Associated Constipation

University of Rochester

NCT01236534

COMPLETED 19 participants

Fiber Formula Study Among Radiation Oncology Patients

Mayo Clinic

NCT00888147

COMPLETED NA 15 participants

Biofeedback Treatment for Functional Constipation

University of California, San Francisco

NCT00502957

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Phase Distribution

PhaseTrial count
Phase 1 5
Phase 2 8
Phase 3 6
Phase 4 10

Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.

Reading the Constipation Trial Landscape

55 indexed Constipation studies · 15 recruiting (27%).

Phase mix: 16 late (III/IV) vs 13 early (I/II).

Top sponsor: Mayo Clinic (5 trials), 9 others listed. 50 shown below, recruiting first.

How to read this condition's trial landscape

That ratio is a useful proxy for activity level: a high share of recruiting studies often signals that research interest is current and that new enrollment opportunities are appearing, while a low share typically means the field is dominated by completed or follow-up work where most participant spots have already been filled. These counts reflect the public registry only and include studies at every stage of design, so they should be read as an index of research attention rather than as a measure of treatment availability.

Phase 1 and Phase 2 studies focus on early safety signals, dosing, and preliminary effect, while Phase 3 studies are typically the larger efficacy and safety trials submitted toward regulatory review, and Phase 4 studies follow approved interventions in real-world use. A condition weighted toward later phases often reflects a mature research pipeline with several interventions already close to or past approval, whereas a heavier early-phase tilt suggests the field is still exploring new mechanisms and candidate approaches.

All figures are derived from the public ClinicalTrials.gov dataset maintained by the National Library of Medicine and are reproduced here for reference. Inclusion of a trial, sponsor, or intervention on this page is neither an endorsement nor a recommendation, eligibility, protocol changes, and site-level status can shift frequently, so always verify current details on ClinicalTrials.gov and consult a qualified healthcare provider before acting on anything you see here.

Frequently Asked Questions

How many clinical trials are there for Constipation?

PlainTrial tracks 55 US clinical trials for Constipation, of which 15 are currently recruiting participants. Data sourced from ClinicalTrials.gov.

How do I find a recruiting trial for Constipation?

Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.

Is this data current?

Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.

Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.

Verify with NIH →

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered trial for this condition, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.