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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Tobacco Use Behavior Clear all
Recruiting Not applicable Interventional

Implementation of Tobacco Cessation Programming at Community Behavioral Health Sites

NCT06837220
View directory record Official record
Conditions
Nicotine Use Disorder, Smoking Cessation, Smoking Cessation Intervention
Interventions
Enhanced Courage to Quit
Behavioral
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 26 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Jul 23, 2026, 2:11 AM 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 Jul 23, 2026, 2:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Switching From Usual Brand Cigarettes to a Tobacco-heating Cigarette or Snus

NCT02061917
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Tobacco-Heating Cigarette, Snus (Smokeless Tobacco), Tobacco-Burning Cigarette
Other
Lead sponsor
R.J. Reynolds Tobacco Company
Industry
Eligibility
28 Years to 55 Years
Enrollment
163 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
5
States / cities
Daytona Beach, Florida • Boise, Idaho • Portland, Oregon + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2016 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Zileuton With or Without Celecoxib As Chemopreventive Agents in Smokers

NCT01021215
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Zileuton, Celecoxib, laboratory biomarker analysis
Drug · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
2
States / cities
New York, New York • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 1, 2015 · Synced Jul 23, 2026, 2:11 AM EDT
Recruiting No phase listed Observational

Measuring Communal Coping in Dual-smoking Couples Making a Quit Attempt

NCT07553962
View directory record Official record
Conditions
Smoking (Tobacco) Addiction, Smoking ( Cigarette), Tobacco, Tobacco Abstinence, Quitting Smoking, Smoking Cessation
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Not applicable Interventional Results available

Financial Incentives for Homeless Smokers: A Community-based RCT

NCT04445662
View directory record Official record
Conditions
Tobacco Smoking
Interventions
Financial incentives, Varenicline, Tobacco coaching
Behavioral · Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Jul 23, 2026, 2:11 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Nicotine Regulation for Dual Users of E-cigarettes and Cigarettes

NCT06614504
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Varying the nicotine content of cigarettes, Varying the nicotine content of e-cigarettes
Other
Lead sponsor
University of Vermont
Other
Eligibility
21 Years and older
Enrollment
308 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Providence, Rhode Island • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Jul 23, 2026, 2:11 AM EDT
Completed No phase listed Observational

Nicotine Reinforcement and Smoking-Cue Reactivity: Association With Genetic Polymorphisms

NCT01505725
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
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study of Inhalation of 20,000 EU CCRE and Mucociliary Clearance (MCC) in Otherwise Healthy Individuals Who Are Current Cigarette Smokers

NCT00924768
View directory record Official record
Conditions
Healthy, Cigarette Smoking
Interventions
20K EU CCRE
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
2009 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 5, 2013 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Smoking Environments on Brain Reactivity

NCT03421210
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Nicotine patch
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 65 Years
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 18, 2021 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Not applicable Interventional Results available

EHR-Based and Fax-Based Referral to a Tobacco Quitline: A Comparative Study

NCT02735382
View directory record Official record
Conditions
Tobacco Use Cessation, Tobacco Smoking
Interventions
Tobacco quitline EHR referral, Tobacco quitline Fax referral
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Not listed
Enrollment
14,930 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 2, 2019 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Reaching and Treating Lesbian, Gay, Bisexual, and Transgender (LGBT) Cigarette Smokers

NCT00634218
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Mail-based Self-help plus Internet-based Smoking Treatment, Self-Help Manual plus Telephone counseling, Self-Help Manual, Self-Help Manual plus Internet-based Intervention plus Telephone Counseling
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
363 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 26, 2012 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 4 Interventional

Methadone-Maintained Smokers Switching to E-Cigarettes

NCT05206435
View directory record Official record
Conditions
Nicotine Dependence, Electronic Cigarette Use
Interventions
Electronic Cigarette, Nicotine Lozenge
Drug
Lead sponsor
Butler Hospital
Other
Eligibility
21 Years to 65 Years
Enrollment
183 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 2Phase 3 Interventional

Tobacco Use in Opioid Agonist Treated Pregnant Women

NCT00497068
View directory record Official record
Conditions
Nicotine Dependence
Interventions
tobacco abstinent contingent, non-contingent, control
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2013 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Evaluation of Abuse Liability of Very Low Nicotine (VLN) Mentholated Cigarettes

NCT03559725
View directory record Official record
Conditions
Tobacco Use
Interventions
VLN menthol cigarettes (A), Usual Brand Menthol Cigarettes (B), Nicotine gum (C)
Other · Drug
Lead sponsor
22nd Century Group, Inc.
Industry
Eligibility
22 Years to 65 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 24, 2020 · Synced Jul 23, 2026, 2:11 AM EDT
Withdrawn Phase 4 Interventional

Effects of Varenicline in Heavy Drinking Smokers

NCT02488889
View directory record Official record
Conditions
Cigarette Smoking, Alcohol Consumption
Interventions
Varenicline, Placebo pill (for varenicline), Alcohol, placebo beverage (for alcohol)
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 55 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 31, 2018 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Extinction Updating in Reconsolidation

NCT02154685
View directory record Official record
Conditions
Nicotine Addiction, Smoking Cessation
Interventions
Retrieval-Extinction, Non-Retrieval Extinction
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 65 Years
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 1, 2015 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Translating Extinction Research to Improve Pharmacotherapy for Tobacco Dependence

NCT02202499
View directory record Official record
Conditions
Smoking Cessation, Tobacco Dependence
Interventions
Varenicline, Counseling and Support Materials, Laboratory Assessments
Drug · Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
86 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Nov 26, 2020 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

E-Cigarettes and Financial Incentives to Promote Tobacco Harm Reduction Among Adults Accessing Shelter Services

NCT03743532
View directory record Official record
Conditions
Cigarette Smoking
Interventions
E-cigarette Switching, Financial Incentives
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
21 Years to 100 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Smoking Cessation for Young Adults Who Binge Drink - 1

NCT00218452
View directory record Official record
Conditions
Adherence, Tobacco Use Cessation, Alcohol & Drug Use, Nicotine Transdermal System
Interventions
Lifestyle counseling
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 25 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
3
States / cities
Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 6, 2015 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

An Internet-Based Smokeless Tobacco Cessation Program for Teens

NCT00680615
View directory record Official record
Conditions
Smokeless Tobacco Use
Interventions
Tailored, enhanced condition, Usual Care
Behavioral
Lead sponsor
Oregon Research Institute
Other
Eligibility
14 Years to 25 Years
Enrollment
1,716 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 4, 2012 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Oxidative Stress and Vitamin E Requirements

NCT00067899
View directory record Official record
Conditions
Smoking
Interventions
Vitamin E with and without Vitamin C
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 35 Years
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2005
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Topiramate Alone and in Combination With the Nicotine Patch for Smoking Cessation: A Pilot Study

NCT00755716
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Placebo (sugar pill), Topiramate, Nicotine patch
Drug
Lead sponsor
UConn Health
Other
Eligibility
18 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2013
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 15, 2017 · Synced Jul 23, 2026, 2:11 AM EDT
Completed Phase 1 Interventional

Effect of Progesterone on Smoking Behavior in Male and Female Smokers

NCT00271206
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Progesterone, sugar pill
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 40 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 1, 2020 · Synced Jul 23, 2026, 2:11 AM EDT