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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Smoking ( Cigarette) Clear all
Completed Not applicable Interventional Accepts healthy volunteers

United States Pre-Market Tobacco Application Pharmacokinetics

NCT03719391
View directory record Official record
Conditions
Nicotine Dependence, Nicotine Dependence, Cigarettes, Tobacco Use, Tobacco Smoking
Interventions
Virginia Tobacco flavored JUUL 5% ENDS, Cool Mint flavored JUUL 5% ENDS, Mango flavored JUUL 5% ENDS, Creme Brulee flavored JUUL 5% ENDS, VUSE Solo e-cigarette, Nicorette White Ice Mint 4mg nicotine polacrilex gum, Usual Brand combustible cigarette
Other
Lead sponsor
Juul Labs, Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 13, 2021 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional

Effect of Cigarette Pack Warnings and Packaging Among Young Adult Smokers

NCT03446170
View directory record Official record
Conditions
Tobacco Use
Interventions
Graphic cigarette warning labels, plain packaging
Behavioral
Lead sponsor
Georgetown University
Other
Eligibility
18 Years to 30 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jan 3, 2022 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

GeoScan and Remote Geo Smoking Study: Neural and Behavioral Correlates of Smokers' Exposure to Retail Environments

NCT04279483
View directory record Official record
Conditions
Smoking, Tobacco, Smoking, Smoking, Cigarette
Interventions
Tobacco retailer, Non-tobacco retailer
Behavioral
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
21 Years to 65 Years
Enrollment
343 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 13, 2025 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Smoking Cessation for Young Adult Pacific Islanders: Motivating Pacifika Against Cigarettes and Tobacco

NCT03238456
View directory record Official record
Conditions
Tobacco Use, Tobacco Smoking, Tobacco Use Cessation, Smoking, Smoking Cessation, Smoking, Cigarette
Interventions
Motivating Pacifika Against Cigarettes and Tobacco
Behavioral
Lead sponsor
Claremont Graduate University
Other
Eligibility
18 Years to 30 Years
Enrollment
278 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
2
States / cities
Claremont, California • Fullerton, California
Source: ClinicalTrials.gov public record
Updated Aug 3, 2017 · Synced Sep 28, 2026, 5:45 PM EDT
Active, not recruiting Not applicable Interventional

Symptoms and Functions in Patients With COPD and Chronic Bronchitis Switching From CIG to THS

NCT07108166
View directory record Official record
Conditions
COPD, Smoking, Tobacco Use
Interventions
Cigarette, THS
Other
Lead sponsor
Philip Morris Products S.A.
Industry
Eligibility
40 Years and older
Enrollment
290 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
46
States / cities
Clearwater, Florida • Coral Gables, Florida • Davie, Florida + 24 more
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 28, 2026, 5:45 PM EDT
Completed No phase listed Observational

Gene-Environment Interactions in Rheumatoid Arthritis Autoimmunity Disease Severity

NCT00594451
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
Not listed
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Sep 28, 2026, 5:45 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Guiding Good Choices for Health

NCT04040153
View directory record Official record
Conditions
Adolescent Substance Use
Interventions
Guiding Good Choices
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
11 Years to 12 Years
Enrollment
3,636 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
3
States / cities
Oakland, California • Aurora, Colorado • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 2, 2024 · Synced Sep 28, 2026, 5:45 PM 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 28, 2026, 5:45 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug-Drug Interaction (DDI) Study for TD-9855

NCT03432793
View directory record Official record
Conditions
Drug Drug Interaction (DDI)
Interventions
TD-9855, Fluvoxamine, Itraconazole, Caffeine
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
19 Years to 55 Years · Male only
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced Sep 28, 2026, 5:45 PM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Hyperpolarized Xenon-129 MR Imaging of the Lung

NCT04662658
View directory record Official record
Conditions
E-Cig Use
Interventions
Hyperpolarized Xenon -129 MRI
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 9, 2020 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Phase 2 Interventional Results available

Varenicline for Treatment of E-cigarette Dependence

NCT05541497
View directory record Official record
Conditions
Smoking Cessation
Interventions
Varenicline Tartrate, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
2
States / cities
New Haven, Connecticut • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 1, 2024 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Developing a Team-Delivered Intervention for Smoking and Hazardous Drinking for Primary Care Veterans With Cardiovascular Diseases

NCT05275582
View directory record Official record
Conditions
Cigarette Use, Alcohol Use Above Recommended Limits, Cardiovascular Risk Factors (e.g., Hypertension), Cardiovascular Diseases
Interventions
CARE
Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
2
States / cities
Buffalo, New York • Syracuse, New York
Source: ClinicalTrials.gov public record
Updated May 19, 2025 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cigarette Pack Inserts for Smoking Cessation

NCT04075682
View directory record Official record
Conditions
Smoking Cessation
Interventions
Inserts with efficacy messages, Pictorial warnings on packs
Other
Lead sponsor
University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
387 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
2
States / cities
Ithaca, New York • Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated May 12, 2024 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional

Addressing Psychological Risk Factors Underlying Smoking Persistence in COPD Patients: The Fresh Start-II Study

NCT04646174
View directory record Official record
Conditions
Copd, Smoking Cessation, Nicotine Dependence, Tobacco Use, Cigarette Smoking
Interventions
Unified Protocol adapted for smoking cessation, American Lung Association self-management strategies for smoking cessation
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 28, 2023 · Synced Sep 28, 2026, 5:45 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Comprehensive Evaluation of Tobacco-Flavored vs. Non-Tobacco Flavored E-cigarettes on Smoking Behavior

NCT06260683
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Nicotine Replacement, Questionnaire Administration, Vaping
Drug · Other · Device
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
1,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Results available

Free-Base Nicotine or Nicotine Salt e-Liquids in Current E-Cigarette Smokers, PeloPET Study

NCT05455086
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Cigarette Smoking, Computed Tomography, Positron Emission Tomography, Questionnaire Administration
Behavioral · Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 50 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 23, 2025 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Results available

Feasibility of Conducting a Pilot Telehealth Study Assessing the Removal of Filter Ventilation on Smoking Behavior and Biomarkers in Menthol Smokers Switched to Non-menthol Cigarettes

NCT04514471
View directory record Official record
Conditions
Smoking
Interventions
Minimally Ventilated non-menthol cigarettes, Ventilated non-menthol cigarettes
Other
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
21 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Phase 2 Interventional

Nicotinic Receptor Augmentation of SSRI Antidepressants

NCT00319319
View directory record Official record
Conditions
Depressive Disorder
Interventions
Mecamylamine hydrochloride (Inversine)
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 18, 2007 · Synced Sep 28, 2026, 5:45 PM EDT
Recruiting No phase listed Observational

Understanding Tobacco and Cannabis Co-Use Practices: Initiation, Escalation, and Maintenance

NCT07439471
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Non-Interventional Study
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 30 Years
Enrollment
40 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 Aug 16, 2026 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

S-Adenosyl-L-Methionine (SAMe) for Smoking Abstinence

NCT00722124
View directory record Official record
Conditions
Tobacco Dependence
Interventions
S-Adenosyl-L-Methionine, placebo
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
2
States / cities
Rochester, Minnesota • La Crosse, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 8, 2011 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

THC Crossover Study

NCT04429568
View directory record Official record
Conditions
THC, Cannabis, Cannabis Smoking, Cannabis Use, Unspecified, Cigarette Smoking, Tobacco Use, Nicotine Dependence, Nicotine Withdrawal, Cardiovascular Risk Factor
Interventions
Smoked Cannabis, Vaped Cannabis, Tobacco Cigarette
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years and older
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
2
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 30, 2024 · Synced Sep 28, 2026, 5:45 PM EDT
Not yet recruiting Phase 4 Interventional

Evaluation of Dependence and Nicotine Replacement Therapy-Supported Cessation Efforts Among Regular Electronic Cigarette Use

NCT07786896
View directory record Official record
Conditions
E Cigarette Use, Cessation, Tobacco, Cessation, Nicotine
Interventions
Nicotine Replacement Therapies, Brief Behavioral Counseling
Drug · Behavioral
Lead sponsor
West Virginia University
Other
Eligibility
21 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Greenville, North Carolina • Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Results available

Evaluating E-Cigarette Nicotine Form, Concentration, and Flavors Among Youth

NCT05458895
View directory record Official record
Conditions
E-cigarette Use
Interventions
ECIG lab session 1, ECIG lab session 2, ECIG lab session 3, ECIG lab session 4, ECIG lab session 5, ECIG lab session 6, ECIG lab session 7, ECIG lab session 8
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 25 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 21, 2024 · Synced Sep 28, 2026, 5:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tobacco Status Project: Social Media Intervention for Young Adult Smokers

NCT02207036
View directory record Official record
Conditions
Smoking
Interventions
Facebook intervention, Smokefree.gov
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 25 Years
Enrollment
501 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 7, 2017 · Synced Sep 28, 2026, 5:45 PM EDT