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Showing 1–24 of 129 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Non-Smoker Clear all
Recruiting No phase listed Observational Accepts healthy volunteers

Collection of Airway, Blood and/or Urine Specimens From Subjects for Research Studies

NCT01776398
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD), Smoking, Smoking Cessation, Idiopathic Pulmonary Fibrosis (IPF), Rheumatoid Arthritis-Associated Interstitial Lung Disease, Scleroderma-Associated Interstitial Lung Disease (SSC-ILD)
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Sep 5, 2026, 4:50 AM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Switching to E-cigarettes in Smokers Not Interested in Quitting

NCT05703672
View directory record Official record
Conditions
Smoking Reduction
Interventions
Varenicline Tartrate, Placebo, Electronic cigarette
Drug · Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
21 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
2
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 28, 2025 · Synced Sep 5, 2026, 4:50 AM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Wound Healing Following Extraction and Ridge Preservation in Smokers and Non-smokers

NCT07372183
View directory record Official record
Conditions
Smoking, Cigarette, Alveolar Bone Grafting, Wound Healing, Bone Healing, Tooth Extraction Site Healing
Interventions
observational study
Other
Lead sponsor
Marquette University
Other
Eligibility
18 Years to 75 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 5, 2026, 4:50 AM EDT
Recruiting Not applicable Interventional

Beating Lung Cancer in Ohio Protocol in Improving Survival in Patients With Stage IV Non-Small Cell Lung Cancer

NCT03199651
View directory record Official record
Conditions
Cigarette Smoker, Current Smoker, Lung Adenocarcinoma, Squamous Cell Lung Carcinoma, Stage IV Non-Small Cell Lung Cancer
Interventions
Best Practice, Biospecimen Collection, Laboratory Biomarker Analysis, Medical Chart Review, Quality-of-Life Assessment, Questionnaire Administration, Smoking Cessation Intervention
Other · Procedure · Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
3,584 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 5, 2026, 4:50 AM EDT
Not listed No phase listed Observational

Project PEER: Understanding the Lung Cancer Patient ExperiEnce in the Real-World Setting

NCT05826756
View directory record Official record
Conditions
Lung Cancer Patients, Caregivers
Interventions
There are no interventions in this study. All participants complete online surveys.
Other
Lead sponsor
LUNGevity Foundation
Other
Eligibility
18 Years and older
Enrollment
1,300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 27, 2023 · Synced Sep 5, 2026, 4:50 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Lung Cancer Biomarkers and Screening

NCT00301119
View directory record Official record
Conditions
Lung Cancer
Interventions
Not listed
Lead sponsor
NYU Langone Health
Other
Eligibility
50 Years and older
Enrollment
3,606 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2030
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 5, 2026, 4:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Defective FGFR2 Signaling in the Small Airway Basal Progenitor Cells in COPD

NCT02341326
View directory record Official record
Conditions
COPD, Smoking, Lung Disorder
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
111 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Salt-Based E-cigarette

NCT04238832
View directory record Official record
Conditions
Smoking, Tobacco Use
Interventions
Salt Base Nicotine, Free Base Nicotine
Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Aug 8, 2021 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nicotine, Non-Smokers With and Without ADHD, and Genetics Study

NCT01819259
View directory record Official record
Conditions
Non-smoker, ADHD
Interventions
Nicotine nasal spray, Placebo
Drug
Lead sponsor
Scott Kollins, PhD
Other
Eligibility
18 Years to 25 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 29, 2018 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Sulforaphane (SFN) on Immune Response to Live Attenuated Influenza Virus in Smokers and Nonsmokers

NCT01269723
View directory record Official record
Conditions
Smoking
Interventions
Broccoli sprout homogenate, Alfalfa sprout homogenate
Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 40 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 28, 2014 · Synced Sep 5, 2026, 4:50 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effects of Electronic Cigarettes on Lung Biology

NCT02188511
View directory record Official record
Conditions
Lung Disease, Lung Disorder
Interventions
Group A, Group B, Group C, Group D, Group E
Other
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
21 Years to 85 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 23, 2020 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional Results available

Nonsmokers Helping Smokers Quit

NCT02010697
View directory record Official record
Conditions
Smoking Cessation
Interventions
Messages targeting nonsmokers, Messages targeting smokers
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
3,125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Feb 12, 2020 · Synced Sep 5, 2026, 4:50 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers Results available

Evaluation of the Effect of a Nasal Allergen Challenge With Dermatophagoides Farinae Extract on Nasal Airway Inflammation in Allergic Individuals, Comparing E-cigarette Users to Cigarette Smokers and Non-smokers.

NCT03023397
View directory record Official record
Conditions
Healthy Participants, Tobacco Smokers
Interventions
Der f
Biological
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 3, 2021 · Synced Sep 5, 2026, 4:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Memory and Picture Viewing Study

NCT00736203
View directory record Official record
Conditions
Healthy, Brain Reactivity of Non-smokers Undergoing fMRI Scanning
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
18 Years to 55 Years
Enrollment
116 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 6, 2013 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nicotine Delivery From Novel Non-Tobacco Electronic System in Smokers

NCT02575885
View directory record Official record
Conditions
Cigarette Smoker, Current Smoker, Healthy Subject
Interventions
Electronic Cigarette, Laboratory Biomarker Analysis, Pharmacological Study, Questionnaire Administration
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 55 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 11, 2018 · Synced Sep 5, 2026, 4:50 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Smoking-induced EGF-dependent Reprogramming of Airway Basal Cell Function

NCT01974180
View directory record Official record
Conditions
Smoking, COPD, Chronic Obstructive Pulmonary Disease
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 25, 2017 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Creating Smokefree Living Together for Chinese Household Pairs

NCT01592682
View directory record Official record
Conditions
Smoking, Smoke Exposure
Interventions
Smokefree counseling
Behavioral
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
410 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Imaging Regional Lung Defect Severity

NCT01640288
View directory record Official record
Conditions
COPD
Interventions
Perfluorinated Gas/Oxygen Mixture, High Resolution CT of the Chest
Drug · Other
Lead sponsor
Hal C Charles
Other
Eligibility
18 Years and older
Enrollment
171 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 16, 2020 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Phase 4 Interventional Results available

Counseling and Nicotine Replacement Therapy in Helping Adult Smokers Quit Smoking

NCT00365508
View directory record Official record
Conditions
Bladder Cancer, Cervical Cancer, Esophageal Cancer, Gastric Cancer, Head and Neck Cancer, Kidney Cancer, Leukemia, Liver Cancer, Lung Cancer, Pancreatic Cancer, Tobacco Use Disorder
Interventions
nicotine lozenge, nicotine patch
Drug
Lead sponsor
Fox Chase Cancer Center
Other
Eligibility
18 Years and older
Enrollment
642 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
10
States / cities
Washington D.C., District of Columbia • Miami Beach, Florida • Augusta, Georgia + 7 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2016 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Phase 1 Interventional

Effects of Nicotine on Elements of Attentions in Smokers and Nonsmokers

NCT01034020
View directory record Official record
Conditions
Substance Related Disorder, Nicotine Dependence
Interventions
Nicotine
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 50 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 5, 2026, 4:50 AM EDT
Completed No phase listed Observational

Breath Carbon Monoxide and Cotinine as Biomarkers to Distinguish Smokers From Nonsmokers

NCT01031121
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 64 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 5, 2026, 4:50 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Heat-not-burn Tobacco Product to Aid in Switching From Combustible to Noncombustible Nicotine (IQOS)

NCT04861428
View directory record Official record
Conditions
Smoking Behaviors
Interventions
IQOS, Smoking as Usual
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
21 Years to 77 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 3, 2024 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional

Broccoli Sprout Extract in Preventing Lung Cancer in Smokers

NCT00255775
View directory record Official record
Conditions
Lung Cancer
Interventions
broccoli sprout extract, complementary or alternative medicine procedure
Dietary Supplement · Procedure
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 8, 2010 · Synced Sep 5, 2026, 4:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

IQOS (Non-Cigarette Tobacco Product) Pilot Study

NCT04357379
View directory record Official record
Conditions
Smoking, Tobacco Use
Interventions
IQOS
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 26, 2021 · Synced Sep 5, 2026, 4:50 AM EDT