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ClinicalTrials.gov public records Last synced Oct 24, 2026, 9:42 AM EDT

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Showing 1–24 of 303 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Breath Testing Clear all
Terminated Not applicable Interventional Accepts healthy volunteers

Nicotine Withdrawal and Reward Processing: Connecting Neurobiology to Real-world Behavior

NCT03840694
View directory record Official record
Conditions
Cigarette Smoking, Nicotine Withdrawal
Interventions
Smoking Abstinence, Ad Lib Smoking
Other
Lead sponsor
Duke University
Other
Eligibility
21 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 20, 2021 · Synced Oct 24, 2026, 9:42 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 5, 2012 · Synced Oct 24, 2026, 9:42 AM EDT
Completed No phase listed Observational

Determinants of Early Cystic Fibrosis Lung Disease

NCT03579173
View directory record Official record
Conditions
Cystic Fibrosis in Children
Interventions
Infant PFT, Lung Clearance Index, Passive tidal breathing
Diagnostic Test
Lead sponsor
Indiana University
Other
Eligibility
1 Month to 5 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 22, 2022 · Synced Oct 24, 2026, 9:42 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Multi-Component Breath Alcohol Intervention Phase 3

NCT06994962
View directory record Official record
Conditions
Alcohol Use, Alcohol Drinking, Drinking Behavior
Interventions
Alcohol-related mobile health technologies, Motivational interview and psychoeducation on blood/breath alcohol concentration, Lower tech facilitation, Higher tech facilitation, Alcohol Education, Alcohol Education Technology
Device · Behavioral
Lead sponsor
Northeastern University
Other
Eligibility
18 Years to 25 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 20, 2026 · Synced Oct 24, 2026, 9:42 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Bacterial Overgrowth Associated With Chronic Multisymptom Illness Complex

NCT00956150
View directory record Official record
Conditions
Gulf War Syndrome
Interventions
Lactulose Breath Test, Rifaximin, Placebo
Procedure · Drug
Lead sponsor
Henry C. Lin, MD
Federal
Eligibility
21 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2009
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated May 1, 2013 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Phase 4 Interventional Results available

A Longitudinal Study to Identify IBS Phenotypes Using Fecal Microbiota and Hydrogen Breath Testing

NCT03219528
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Rifaximin 550 MG, Low FODMAP Diet
Drug · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 27, 2025 · Synced Oct 24, 2026, 9:42 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Towards a Wearable Alcohol Biosensor: Examining the Accuracy of BAC Estimates From New-Generation Transdermal Technology Using Large-Scale Human Testing and Machine Learning Algorithms

NCT05692830
View directory record Official record
Conditions
Alcohol Drinking, Alcohol Intoxication
Interventions
Alcohol
Drug
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
21 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Champaign, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 6, 2025 · Synced Oct 24, 2026, 9:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Breath Test for Early Detection of Lung Cancer

NCT00639067
View directory record Official record
Conditions
Lung Neoplasms
Interventions
Breath Collection Apparatus
Device
Lead sponsor
Menssana Research, Inc.
Industry
Eligibility
18 Years and older
Enrollment
215 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
4
States / cities
Newark, Delaware • Orlando, Florida • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated May 16, 2014 · Synced Oct 24, 2026, 9:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

POC Performance Evaluation of LumiraDx SARS-CoV-2 Ag Ultra and SARS-CoV-2 & Flu A/B Tests.

NCT05728970
View directory record Official record
Conditions
SARS-CoV-2, Influenza A, Influenza B, COVID-19
Interventions
LumiraDx SARS-CoV-2 Ag Ultra, LumiraDx SARS-CoV-2 & Flu A/B
Diagnostic Test
Lead sponsor
LumiraDx UK Limited
Industry
Eligibility
Not listed
Enrollment
716 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
10
States / cities
Garden Grove, California • Lomita, California • DeLand, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2026 · Synced Oct 24, 2026, 9:42 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

GERD and Anti-Reflux Therapy Between Able-bodied and SCI Individuals

NCT02584751
View directory record Official record
Conditions
Gastro Esophageal Reflux Disorder
Interventions
Omeprazole, 24 Hour pH Monitor, Pulmonary Function Examination, Exhaled Nitric Oxide, Exhaled Breath Concentrate (EBC), Bernstein's Acid Clearance Test, Esophageal Motility
Drug · Device · Procedure
Lead sponsor
James J. Peters Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 75 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2016
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Nov 15, 2016 · Synced Oct 24, 2026, 9:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Volatile Organic Compounds (VOCs) in Active Inflammatory Bowel Disease

NCT04827368
View directory record Official record
Conditions
IBD, Crohn Disease, Ulcerative Colitis
Interventions
Breath Test
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Oct 24, 2026, 9:42 AM EDT
Completed No phase listed Observational

Delineating Swallowing Impairment and Decline in ALS

NCT02962050
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Videofluoroscopic Swallowing Study (VFSS), Voluntary Peak Cough Flow Testing, Iowa Oral Performance Instrument, Capsaicin Challenge, Pulmonary Function Testing, Eating Assessment Tool 10, The Center for Neurologic Study Bulbar Function Scale
Procedure · Device · Drug + 1 more
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 90 Years
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
2
States / cities
Gainesville, Florida • Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Feb 23, 2023 · Synced Oct 24, 2026, 9:42 AM EDT
Recruiting No phase listed Observational

Efficacy and Safety of Endoscopic Antral Myotomy as a Novel Weight Loss Procedure

NCT05711758
View directory record Official record
Conditions
Obesity, Obesity, Morbid, Obesity, Primary, Metabolic Disease, Delayed Gastric Emptying Following Procedure
Interventions
PSAM Treatment Patients
Procedure
Lead sponsor
Christopher C. Thompson, MD, MSc
Other
Eligibility
18 Years to 70 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Oct 24, 2026, 9:42 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 8, 2019 · Synced Oct 24, 2026, 9:42 AM EDT
Withdrawn Not applicable Interventional

The Effectiveness of the Jamboxx Respiratory Therapy Device: Study 2

NCT03522480
View directory record Official record
Conditions
Cystic Fibrosis in Children
Interventions
Jamboxx Respiratory Therapy Device, Autogenic Draining Training
Device · Other
Lead sponsor
My Music Machines Inc.
Industry
Eligibility
5 Years to 17 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Sep 2, 2020 · Synced Oct 24, 2026, 9:42 AM EDT
Withdrawn Phase 3 Interventional

Effect of Methylnaltrexone (Relistor) on Digestion and Tolerance to Tube Feeding in Patients Treated With Opiates

NCT01360372
View directory record Official record
Conditions
Tube Feeding
Interventions
Methylnaltrexone, Saline injection
Drug
Lead sponsor
Drexel University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 17, 2015 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Validation of Alcohol Level Identification Using DRIVESC

NCT07282405
View directory record Official record
Conditions
Driving Impaired
Interventions
DRIVESC, Alcohol
Diagnostic Test · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 64 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 27, 2026 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Phase 2 Interventional Results available

Fentanyl Pectin Nasal Spray (FNPS) for Exercise-Induced Breakthrough Dyspnea

NCT01832402
View directory record Official record
Conditions
Advanced Cancers
Interventions
Fentanyl Pectin Nasal Spray, Placebo Nasal Spray, Walk Test, Questionnaires, Mental Ability Tests
Drug · Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 8, 2023 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Phase 4 Interventional

Hyperpolarized Imaging for New Treatments

NCT04259970
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Initiation of CFTR Modulator
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
6 Years to 18 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
3
States / cities
Cincinnati, Ohio • Charlottesville, Virginia • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Residual Effects of Intoxication on Student Performance

NCT00183170
View directory record Official record
Conditions
Alcoholic Intoxication, Neurobehavioral Manifestations
Interventions
Alcohol, Placebo
Drug · Other
Lead sponsor
Boston University
Other
Eligibility
21 Years to 30 Years
Enrollment
239 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 8, 2020 · Synced Oct 24, 2026, 9:42 AM EDT
Terminated Early Phase 1 Interventional Results available

Effect of a Low FODMAP Diet on SIBO Breath Test Positivity

NCT04627727
View directory record Official record
Conditions
SIBO
Interventions
low FODMAP diet
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 4, 2025 · Synced Oct 24, 2026, 9:42 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 8, 2020 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Juice Types on the Responses to Air Pollution

NCT02027415
View directory record Official record
Conditions
Air Pollution
Interventions
Beet juice, Orange juice
Dietary Supplement
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 13, 2017 · Synced Oct 24, 2026, 9:42 AM EDT
Completed Not applicable Interventional Results available

COPD Assessment and Management Bundle Versus Usual Care

NCT01833026
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Spirometry test, Levalbuterol
Device · Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
40 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 24, 2019 · Synced Oct 24, 2026, 9:42 AM EDT