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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Abdominal Distention Clear all
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 22, 2026, 1:07 PM EDT
Completed No phase listed Observational

Helicobacter Pylori Sample Collection Protocol Pre Therapy Subjects

NCT03060746
View directory record Official record
Conditions
Helicobacter Pylori Infection, Gastric Ulcer, Nausea, Abdominal Pain, Weight Loss, Stomach Ulcer, Loss of Appetite, Bloating
Interventions
Newly Diagnosed
Other
Lead sponsor
DiaSorin Inc.
Industry
Eligibility
22 Years and older
Enrollment
277 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
11
States / cities
Mesa, Arizona • Mission Hills, California • Oxnard, California + 8 more
Source: ClinicalTrials.gov public record
Updated Dec 29, 2021 · Synced Sep 22, 2026, 1:07 PM EDT
Active, not recruiting Not applicable Interventional

A Clinical Trial to Evaluate the Effects of a Fibre Supplement on Microbiome and Gut Health

NCT07781488
View directory record Official record
Conditions
Gut Health, Microbiome, Bloating, Indigestion, Constipation, Diarrhea, Food Cravings, Abdominal Discomfort, Bowel Movement Irregularity
Interventions
Essential Fibre+
Dietary Supplement
Lead sponsor
Artah Nutrition Limited
Industry
Eligibility
21 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 23, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Phase 3 Interventional

Efficacy of Pancrelipase on Postprandial Belching and Bloating.

NCT00266721
View directory record Official record
Conditions
Postprandial Bloating, Postprandial Belching, Postprandial Eructation
Interventions
Pancrelipase (Creon) 2 tablets with each meal
Drug
Lead sponsor
Solvay Pharmaceuticals
Industry
Eligibility
18 Years to 70 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 18, 2005 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Not applicable Interventional

Efficacy of Probiotic Bacteria in Subjects With IBS or Functional Diarrhea/ Bloating

NCT00618904
View directory record Official record
Conditions
Pain
Interventions
Probiotics - Lactobacillus and bifidobacterium, Placebo
Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 75 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 8, 2013 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Study to Evaluate OPTI-BIOME™ Bacillus Subtilis MB40 on Abdominal Discomfort, Gas and Bloating in a Healthy Population

NCT02950012
View directory record Official record
Conditions
Bloating
Interventions
OPTI-BIOME™ Bacillus subtilis MB40, Placebo
Dietary Supplement · Other
Lead sponsor
BIO-CAT Microbials, LLC
Industry
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Foothill Ranch, California • Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Oct 28, 2021 · Synced Sep 22, 2026, 1:07 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 Sep 22, 2026, 1:07 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

An Efficacy Trial in the Research Area of Gastrointestinal Health & Bloating

NCT05418127
View directory record Official record
Conditions
Gastrointestinal Dysfunction
Interventions
Active, Placebo
Dietary Supplement · Other
Lead sponsor
Coconut Goodness Food Products Inc.
Industry
Eligibility
25 Years to 54 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 18, 2023 · Synced Sep 22, 2026, 1:07 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

GI Neuromuscular Pathology Prospective Registry

NCT02165059
View directory record Official record
Conditions
Gastroparesis
Interventions
Surgical Full Thickness Biopsy
Procedure
Lead sponsor
Indiana University
Other
Eligibility
6 Months to 90 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2026
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of a Fiber Supplement on Gut Health

NCT07755735
View directory record Official record
Conditions
Gut Health, Bloating, Irregular Bowel Movements, Gastrointestinal Symptoms
Interventions
Active Supplement, Placebo Comparator
Dietary Supplement
Lead sponsor
Belli Welli Inc.
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Capsule Microbiota Sampling in IBS/Functional Gastrointestinal Disease

NCT06215222
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome, Healthy, Functional Bloating, Functional Gastrointestinal Disorders
Interventions
Microbiota Sampling
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Redwood City, California
Source: ClinicalTrials.gov public record
Updated Jan 21, 2024 · Synced Sep 22, 2026, 1:07 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Diaphragmatic Breathing for the Treatment of Bloating and Distension

NCT06596759
View directory record Official record
Conditions
Bloating
Interventions
Diaphragmatic Breathing
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Not yet recruiting Not applicable Interventional

Fiber Product for Gas, Bloating, and Bowel Regularity

NCT06642766
View directory record Official record
Conditions
Bloating, Bowel Irregularities, Bowel Gas
Interventions
Fiber supplement
Dietary Supplement
Lead sponsor
Bell Cinical Service
Industry
Eligibility
18 Years to 90 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Edina, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 14, 2024 · Synced Sep 22, 2026, 1:07 PM EDT
Suspended Phase 2 Interventional

A Four Arm Study to Evaluate the Safety and Efficacy of 3 Different Doses of RVX-100 Versus Placebo in Subjects With Irritable Bowel Syndrome Accompanied by Diarrhea (IBS-D)

NCT01076699
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
0.075 mg RVX-100, 0.125 mg RVX-100, 0.250 mg RVX-100, placebo
Drug
Lead sponsor
Revogenex, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
192 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Chevy Chase, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 18, 2010 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Phase 2 Interventional

A Safety and Efficacy Study of Daikenchuto (TU-100) to Relieve Abdominal Bloating in Female Subjects With Irritable Bowel Syndrome

NCT02074579
View directory record Official record
Conditions
Irritable Bowel Syndrome in Females
Interventions
TU-100, Placebo
Drug
Lead sponsor
Tsumura USA
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 1, 2017 · Synced Sep 22, 2026, 1:07 PM EDT
Not listed Phase 3 Interventional

Intranasal PH80 Spray for Acute Management of the Symptoms of Premenstrual Dysphoric Disorder

NCT01217775
View directory record Official record
Conditions
Premenstrual Dysphoric Disorder
Interventions
PH80, Placebo intranasal spray
Drug
Lead sponsor
Pherin Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 43 Years · Female only
Enrollment
1,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Evaluate the Efficacy of Poppi Apple Cider Vinegar Prebiotic Soda to Improve Gut Health In Participants

NCT05418439
View directory record Official record
Conditions
IBS - Irritable Bowel Syndrome
Interventions
Drink Poppi Soda
Dietary Supplement
Lead sponsor
Drink Poppi
Industry
Eligibility
18 Years to 45 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Jun 14, 2022 · Synced Sep 22, 2026, 1:07 PM EDT
Recruiting Not applicable Interventional

Viome Nutritional Programs to Improve Clinical Outcomes for Gastrointestinal Conditions

NCT05465629
View directory record Official record
Conditions
Gastrointestinal Health
Interventions
VIOME Precision Nutrition Program, VIOME-designed condition-based supplements
Combination Product · Dietary Supplement
Lead sponsor
Viome
Industry
Eligibility
25 Years to 75 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Clinical Study to Assess the Effect of a Dietary Supplement on Menstrual Cycle Symptoms

NCT07267728
View directory record Official record
Conditions
Premenstrual Syndrome, Menstrual Pain
Interventions
DITTO Cycle Supplement
Dietary Supplement
Lead sponsor
Muse Nutrition Ltd
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 16, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Impact of B. Adolescentis iVS-1 Probiotic on Gastrointestinal Outcomes

NCT07408518
View directory record Official record
Conditions
Digestive Disease, Gut Health
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Synbiotic Health
Industry
Eligibility
18 Years to 75 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

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

NCT07215351
View directory record Official record
Conditions
Constipation, Bloating
Interventions
Dietary supplement for digestive health, placebo capsule
Dietary Supplement
Lead sponsor
University of Memphis
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Phase 3 Interventional Results available

Multicenter Study to Evaluate the Efficacy and Safety of Metoclopramide Nasal Spray in Women With Diabetic Gastroparesis

NCT02025725
View directory record Official record
Conditions
Diabetic Gastroparesis
Interventions
Metoclopramide Nasal Spray, Placebo Nasal Spray
Drug
Lead sponsor
Evoke Pharma
Industry
Eligibility
18 Years to 75 Years · Female only
Enrollment
205 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
50
States / cities
Birmingham, Alabama • Dothan, Alabama • Huntsville, Alabama + 46 more
Source: ClinicalTrials.gov public record
Updated Jul 6, 2020 · Synced Sep 22, 2026, 1:07 PM EDT
Completed No phase listed Observational

Helicobacter Pylori Sample Collection Protocol Post Therapy Subjects

NCT03060733
View directory record Official record
Conditions
Helicobacter Pylori Infection, Gastric Ulcer, Nausea, Abdominal Pain, Weight Loss, Stomach Ulcer, Loss of Appetite, Bloating
Interventions
Post-Therapy
Other
Lead sponsor
DiaSorin Inc.
Industry
Eligibility
22 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
4
States / cities
Mission Hills, California • Great Neck, New York • Mentor, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Feb 6, 2019 · Synced Sep 22, 2026, 1:07 PM EDT
Completed Phase 2 Interventional

YM443 in Subjects With Functional Dyspepsia

NCT00102310
View directory record Official record
Conditions
Indigestion, Nausea
Interventions
YM443
Drug
Lead sponsor
Astellas Pharma Inc
Industry
Eligibility
18 Years to 75 Years
Enrollment
416 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
59
States / cities
Huntsville, Alabama • Little Rock, Arkansas • Anaheim, California + 52 more
Source: ClinicalTrials.gov public record
Updated Jan 9, 2018 · Synced Sep 22, 2026, 1:07 PM EDT