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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 3 Interventional Results available

Weight Loss in Parkinson's Disease and Role of Small Bowel Bacterial Overgrowth

NCT01662791
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Rifaximin
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 3, 2016 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Double Crossover Casein Type Tolerance Trial

NCT06315517
View directory record Official record
Conditions
Dairy Intolerance, Healthy Adults
Interventions
Conventional lactose-free cow's milk, Nonconventional (A2) cow's milk, Nonconventional (A2) lactose-free cow's milk
Other
Lead sponsor
Auburn University
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Auburn, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 3, 2025 · Synced Sep 9, 2026, 10:10 AM EDT
Terminated Phase 2 Interventional Results available

Acute Effects of Inhaled Treprostinil in Fontan Patients

NCT02769624
View directory record Official record
Conditions
Congenital Heart Disease
Interventions
Treprostinil, Placebo
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 28, 2020 · Synced Sep 9, 2026, 10:10 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Mindfulness-Based Intervention With a Supplement for Stress-Related Problems in College Students Across Multiple Sites (4SITE)

NCT07098845
View directory record Official record
Conditions
Stress, Mental Health, Mindfulness Based Stress Reduction
Interventions
Learning to BREATHE, Learning to BREATHE Plus, HealthEd
Behavioral
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 25 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
4
States / cities
Denver, Colorado • Fort Collins, Colorado • Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Sep 9, 2026, 10:10 AM EDT
Completed No phase listed Observational

Measuring Exhaled Nitric Oxide (eNO) Using the Apieron INSIGHT System and the Aerocrine NIOX System

NCT00739531
View directory record Official record
Conditions
Asthma
Interventions
Exhaled nitric oxide (eNO)
Device
Lead sponsor
Apieron
Industry
Eligibility
5 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007
U.S. locations
2
States / cities
Shreveport, Louisiana • Lake Oswego, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 20, 2008 · Synced Sep 9, 2026, 10:10 AM EDT
Recruiting No phase listed Observational

The APS Phenotyping Study

NCT06521502
View directory record Official record
Conditions
ARDS, Sepsis, Pneumonia
Interventions
Blood collection, Urine Collection, Nasal, oral, and rectal swabs, Stool collection, Heat Moisture Exchange Filter collection, Tracheal Aspirate sample collection, Non-bronchoscopic bronchoalveolar lavage (NBBAL), Surveys, Short physical performance battery, Hand grip strength, CNS Vital Signs, Muscle Ultrasound, Muscle Strength, Spirometry, Lung Diffusion Testing (DLCO), Chest CT Scan
Other · Procedure · Radiation
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
20
States / cities
Fresno, California • Palo Alto, California • San Francisco, California + 12 more
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 9, 2026, 10:10 AM EDT
Completed No phase listed Observational

H. Pylori Testing for Patients With Non-specific Upper Abdominal Pain in the Emergency Department

NCT01376414
View directory record Official record
Conditions
Gastritis, Peptic Ulcer, Peptic Ulcer Perforation, Stomach Ulcer
Interventions
Urea Breath Test (UBT) for H. pylori infection
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Enrollment
212 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 25, 2016 · Synced Sep 9, 2026, 10:10 AM EDT
Not listed Phase 4 Interventional

Lexiscan(TM) Rb-82 Myocardial Perfusion PET: A Comparison With Dipyridamole Stress

NCT00808314
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Rest/Dipyridamole Stress Rb-82 Myocardial Perfusion PET/CT, Rest/Lexiscan(TM) Stress Rb-82 Myocardial Perfusion PET
Drug
Lead sponsor
Cardiovascular Imaging Technologies
Industry
Eligibility
35 Years to 90 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 1, 2012 · Synced Sep 9, 2026, 10:10 AM EDT
Withdrawn Early Phase 1 Interventional Accepts healthy volunteers

Health Literacy and Smoking Cessation in Low-SES Diverse Smokers - Project HALT II

NCT02942212
View directory record Official record
Conditions
Smoking Cessation
Interventions
Questionnaire, In-Depth Interviews, Breath Test, Nicotine Patches, Advice plus Phone Counseling, Advice plus Counseling Sessions, Self Assessment Questionnaires
Behavioral · Other · Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
25 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 30, 2019 · Synced Sep 9, 2026, 10:10 AM EDT
Completed No phase listed Observational

Longitudinal Evaluation of HIV-associated Lung Disease Phenotypes

NCT02238327
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, HIV, Emphysema
Interventions
blood draw, questionnaires, Lung function testing, Six-Minute walk test, Quantitative CT scans, Nasal secretion and cell collection, Echocardiogram
Procedure · Radiation
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 80 Years
Enrollment
232 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 7, 2020 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Early Phase 1 Interventional

A Methodology Trial Using the VR647 Inhalation System in Pediatric Subjects Who Have Previously Received Inhaled Therapy

NCT04011709
View directory record Official record
Conditions
Cough, Wheezing
Interventions
VR647 Inhalation System + VR647 Smart Card 3 Secs, VR647 Inhalation System + VR647 Smart Card 2 Secs, VR647 Inhalation System + VR647 Smart Card 4 Secs
Combination Product
Lead sponsor
Vectura Limited
Industry
Eligibility
1 Year to 5 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
5
States / cities
Mission Viejo, California • Plymouth, Minnesota • St Louis, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 7, 2019 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Phase 2 Interventional

Phase 2 Study to Evaluate the Preliminary Performance of the C13-URA Breath Test Kit in Dyspeptic Subjects

NCT01677338
View directory record Official record
Conditions
Dyspeptic Subjects
Interventions
13C-uracil, 99mTc sulfur colloid
Drug
Lead sponsor
Otsuka Pharmaceutical Co., Ltd.
Industry
Eligibility
21 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
2
States / cities
Orlando, Florida • Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Apr 7, 2019 · Synced Sep 9, 2026, 10:10 AM EDT
Completed No phase listed Observational

Adiposity and Airway Inflammation in HIV-Associated Airway Disease

NCT02975258
View directory record Official record
Conditions
Asthma, HIV, Adiposity
Interventions
Blood draw, Questionnaires, Spirometry, Methacholine challenge test, Quantitative CT scans, Urine pregnancy test, Adipose biopsy, Exhaled nitric oxide measurement
Procedure · Other · Radiation
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 80 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 12, 2017 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

The Impact and Detection of Driving Impairments Associated With Acute Cannabis Smoking

NCT02849587
View directory record Official record
Conditions
Cannabis Intoxication
Interventions
Cannabis
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 55 Years
Enrollment
199 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 3, 2022 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Different Carbohydrate Feedings on a Hydrogen Breath Curve and Self-reported Gastrointestinal Complaints

NCT06648967
View directory record Official record
Conditions
Quality of Life
Interventions
Supplementation with a multi-ingredient whey supplement
Dietary Supplement
Lead sponsor
Arizona State University
Other
Eligibility
18 Years to 60 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Not applicable Interventional Results available

Rifaximin for the Treatment of Persistent Symptoms in Patients With Celiac Disease

NCT01137955
View directory record Official record
Conditions
Celiac Disease
Interventions
Rifaximin, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 28, 2022 · Synced Sep 9, 2026, 10:10 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Cue Reactivity in Virtual Reality: The Role of Context

NCT00862927
View directory record Official record
Conditions
Smoking
Interventions
Breath Sample, Saliva Sample, Questionnaire, View Virtual Reality Scenes
Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 19, 2012 · Synced Sep 9, 2026, 10:10 AM EDT
Not listed No phase listed Observational

Comparative Assessment of Radioisotope Glucose and Breath Test

NCT04499742
View directory record Official record
Conditions
Small Intestinal Bacterial Overgrowth
Interventions
Using Isotope (Tc99m-Sulfur Colloid) to label glucose and administer this directly into duodenum.
Radiation
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 4, 2020 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Studies to Determine Whether Oxygen Sensing is Impaired in Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infected Patients

NCT04954157
View directory record Official record
Conditions
Hypoxia, SARS-CoV-2 Acute Respiratory Disease, Carotid Bodies
Interventions
Phase-1: Breath Holding Test, Phase 2: 6-Minute Walk Test (6MWT)
Diagnostic Test
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 15, 2022 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Phase 4 Interventional Results available

Ketone Monitoring in T1D: Effect of SGLT2i During Usual Care and With Insulin Deficiency

NCT05541484
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
SGLT2 inhibitor, Biosense Breath Ketone Analyzer
Drug · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Not applicable Interventional Results available

Vivatmo Pro™ for Fractional Exhaled Nitric Oxide (FeNO) Monitoring in U.S. Asthmatic Patients

NCT04450108
View directory record Official record
Conditions
Asthma, Asthma in Children
Interventions
Vivatmo pro FeNO Test
Diagnostic Test
Lead sponsor
Bosch Healthcare Solutions GmbH
Industry
Eligibility
7 Years to 80 Years
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
6
States / cities
Birmingham, Alabama • Bakersfield, California • White Marsh, Maryland + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2022 · Synced Sep 9, 2026, 10:10 AM EDT
Active, not recruiting No phase listed Observational

Blood Vessel Anatomy and Blood Flow Regulation

NCT05396287
View directory record Official record
Conditions
Brain Blood Flow, Healthy
Interventions
MRI
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
55 Years to 69 Years
Enrollment
80 participants
Timeline
2022 – 2027
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 9, 2026, 10:10 AM EDT
Completed No phase listed Observational

Wearable Electronic Breath Sound Sensing Device

NCT06734793
View directory record Official record
Conditions
Asthma in Children, Asthma Attack
Interventions
Wearable stethoscope, Routine Clinical lung Auscultation
Device · Other
Lead sponsor
Emory University
Other
Eligibility
6 Years to 17 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 9, 2026, 10:10 AM EDT
Completed Phase 2 Interventional

Phase II Study of Tailored-Dose Docetaxel in Metastatic Breast Cancer

NCT00148070
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
Docetaxel, Erythromycin Breath Test (ERMBT)
Drug · Procedure
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2006
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 4, 2012 · Synced Sep 9, 2026, 10:10 AM EDT