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ClinicalTrials.gov public records Last synced Sep 7, 2026, 8:36 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Breath Testing Clear all
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Novel vs. Usual Brand Menthol Cigarettes on Abuse Liability

NCT07564648
View directory record Official record
Conditions
Cigarette Addiction, Tobacco Use Disorder
Interventions
Biospecimen Collection, Questionnaire Administration, Cigarette Purchase Task, Cross-Price Elasticity Task, Daily Diary Surveys, Progressive Ratio Task
Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 7, 2026, 8:36 PM EDT
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 7, 2026, 8:36 PM EDT
Completed Not applicable Interventional

Web-Delivered Interventions for Blood Sugar Control for Individuals With Type 2 Diabetes

NCT02676648
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Multicomponent online program, Breath meter, Text messages, Diet-appropriate foods and cookbooks
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 8, 2021 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Intestinal Microecology in Chronic Constipation

NCT00934479
View directory record Official record
Conditions
Other Constipation, Irritable Bowel Syndrome
Interventions
Lubiprostone
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 16, 2013 · Synced Sep 7, 2026, 8:36 PM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Sleep Disordered Breathing With Opioid Use

NCT05589753
View directory record Official record
Conditions
Sleep Apnea, Opioid Use, Sleep Disordered Breathing
Interventions
Hyperoxia, Acetazolamide
Other · Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 89 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 7, 2026, 8:36 PM 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 Apr 30, 2013 · Synced Sep 7, 2026, 8:36 PM EDT
Completed No phase listed Observational

Breath Test for Chemicals (Volatile Organic Compounds)

NCT01437033
View directory record Official record
Conditions
Breath Tests, Human Volunteers, Pilot Study
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
30 Years to 60 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 7, 2026, 8:36 PM 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 7, 2026, 8:36 PM EDT
Completed Not applicable Interventional

Testing the Effectiveness of Child and Parent-Targeted Health Promotion Interventions in Pediatric Stem Cell Transplantation

NCT00760227
View directory record Official record
Conditions
Bone Marrow, Stem Cell Transplant
Interventions
Massage Therapy, Humor Therapy, Relaxation Therapy
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
6 Years to 18 Years
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
3
States / cities
Columbus, Ohio • Philadelphia, Pennsylvania • Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 28, 2011 · Synced Sep 7, 2026, 8:36 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Effects of Alcohol and Mood on Attention

NCT04276779
View directory record Official record
Conditions
Suicidal Ideas
Interventions
Alcohol administration, Placebo administration, Positive mood induction, Negative mood induction
Other · Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
21 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 7, 2026, 8:36 PM 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 7, 2026, 8:36 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Cough According to Stimulus Type in PD

NCT02390089
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Capsaicin vapor, fog, Videofluoroscopic swallow evaluation, Nebulizer
Drug · Other · Radiation + 1 more
Lead sponsor
University of Florida
Other
Eligibility
50 Years to 80 Years
Enrollment
158 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 14, 2019 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Not applicable Interventional Results available

Contingency Management to Promote Smoking Abstinence in Cancer Patients

NCT04605458
View directory record Official record
Conditions
Smoking Cessation
Interventions
Contingency Management, Standard Care
Combination Product
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
282 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Aug 17, 2026 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Not applicable Interventional

Breath Training Exercise for the Reduction of Chronic Dyspnea

NCT01831388
View directory record Official record
Conditions
Chronic Pulmonary Disorder
Interventions
breathing techniques, Self-Administered Baseline and Transition Dyspnea Indexes
Other · Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
19 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Sep 7, 2026, 8:36 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Impact of E-cigarette Use on the Body

NCT04972513
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Biospecimen Collection, Nitric Oxide Breath Test, Oscillometry, Spirometry, Survey Administration, Endothelial function
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
15 Years to 25 Years
Enrollment
182 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 22, 2026 · Synced Sep 7, 2026, 8:36 PM EDT
Completed No phase listed Observational

Lactate for Energy and Neurocognition

NCT05207397
View directory record Official record
Conditions
Healthy Aging, Alzheimer Disease
Interventions
Lactate infusion
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
60 Years to 95 Years
Enrollment
24 participants
Timeline
2023 – 2024
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 13, 2025 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Normal Breathing and Swallowing in Healthy Volunteers

NCT03122145
View directory record Official record
Conditions
Healthy
Interventions
Capsaicin, Videofluoroscopic swallow study
Drug · Device
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 100 Years
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

GEBT Telehealth Administration Usability Study

NCT04684992
View directory record Official record
Conditions
Gastroparesis
Interventions
GEBT Telehealth Administration Usability
Device
Lead sponsor
Cairn Diagnostics
Industry
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Brentwood, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 23, 2021 · Synced Sep 7, 2026, 8:36 PM EDT
Terminated Early Phase 1 Interventional

19F MRI of Ventilation in Subjects With Cystic Fibrosis Undergoing Treatment for Pulmonary Exacerbation

NCT03497117
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Lung Clearance Index, MRI with PFP
Device · Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 99 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Not applicable Interventional

Lung Function Testing in Patients With Locally Advanced or Metastatic Solid Tumors

NCT00914147
View directory record Official record
Conditions
Unspecified Adult Solid Tumor, Protocol Specific
Interventions
pulmonary function testing
Procedure
Lead sponsor
Barbara Ann Karmanos Cancer Institute
Other
Eligibility
18 Years to 120 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 7, 2021 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Early Phase 1 Interventional

Accurate Screening Tools for Dysphagia in Amyotrophic Lateral Sclerosis (ALS)

NCT02710162
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Micro Mouth Pressure Meter, Iowa Oral Performance Instrument, Electrical Impedance Myography, Capsaicin, Videofluoroscopic Swallowing Study, Pulmonary Function Testing, Swallowing Related Quality of Life Questionnaire, Functional Oral Intake Scale, Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised, Eating Assessment Tool-10, Communicative Effectiveness Survey, The Center for Neurologic Studies Bulbar Function Scale
Device · Drug · Procedure + 1 more
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 85 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 20, 2017 · Synced Sep 7, 2026, 8:36 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Myocardial Performance at Rest and During Exercise in Heart Failure With Preserved Ejection Fraction

NCT01747785
View directory record Official record
Conditions
Heart Failure
Interventions
Cardiac rehabilitation, Myocardial deformation imaging, Cardiopulmonary exercise test
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
La Crosse, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 16, 2016 · Synced Sep 7, 2026, 8:36 PM EDT
Recruiting Not applicable Interventional

Titrated Ambulatory Oxygen in Fibrotic ILD and COPD With Isolated Exertional Hypoxemia

NCT07512687
View directory record Official record
Conditions
Interstitial Lung Disease, Chronic Obstructive Pulmonary Disease, Hypoxemia
Interventions
Portable Oxygen Concentrator, Portable compressed oxygen D-tanks, No ambulatory oxygen therapy
Device · Other
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years to 85 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 7, 2026, 8:36 PM EDT
Completed Phase 2 Interventional Results available

BREATHID Octanoate Breath Test With or Without Methacetin Breath Test for Correlation With Biopsy in NASH

NCT02314026
View directory record Official record
Conditions
Non-Alcoholic Steatohepatitis
Interventions
Suspected NASH BreathID test with 13C-Octanoate, Suspected NASH Breath test with 13C Methacetin
Device
Lead sponsor
Meridian Bioscience, Inc.
Industry
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
8
States / cities
Chicago, Illinois • Forts Sam Houston, Texas • Houston, Texas + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 19, 2022 · Synced Sep 7, 2026, 8:36 PM EDT