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ClinicalTrials.gov public records Last synced Oct 21, 2026, 6:40 PM EDT

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Showing 313–336 of 2,080 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Smoking Behavior Clear all
Completed Phase 3 Interventional

A Twelve-Week Study of Varenicline for Safety and Efficacy in Comparison With Placebo and Zyban for Smoking Cessation

NCT00141206
View directory record Official record
Conditions
Smoking Cessation
Interventions
varenicline (CP-526,555)
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 75 Years
Enrollment
1,005 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
20
States / cities
Tucson, Arizona • Los Angeles, California • Newport Beach, California + 17 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2007 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Nicotine Patch as an Adjunctive Intervention to Reduce Secondhand Smoke Among NICU Families

NCT04045964
View directory record Official record
Conditions
Environmental Tobacco Smoke, Smoking Cessation
Interventions
nicotine replacement therapy (NRT), motivational advice, Quitline referral
Drug · Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
Not listed
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 11, 2024 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Switching to Reduced Oxidant or Nicotine Content Cigarettes in Smokers

NCT02415270
View directory record Official record
Conditions
Tobacco Smoking Behavior
Interventions
Reduced Nicotine Cigarettes, Reduced ROS/RNS, Control
Other
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
21 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 27, 2018 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Phase 4 Interventional Results available

Randomized Study Comparing the Efficacy and Safety of Varenicline Tartrate to Placebo in Smoking Cessation When Subjects Are Allowed to Set Their Own Quit Date

NCT00691483
View directory record Official record
Conditions
Smoking Cessation
Interventions
placebo, varenicline
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 75 Years
Enrollment
659 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
12
States / cities
Litchfield Park, Arizona • Los Angeles, California • Santa Ana, California + 9 more
Source: ClinicalTrials.gov public record
Updated Nov 20, 2015 · Synced Oct 21, 2026, 6:40 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Role of Flavor in the Substitutability of E-cigarettes for Combustible Cigarettes Among Persistent Smokers

NCT06264154
View directory record Official record
Conditions
Smoking, Tobacco Use, Cigarette Smoking, E-Cig Use
Interventions
E-cigarettes
Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
21 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Oct 21, 2026, 6:40 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Smart Olfaction App to Reduce Relapse

NCT07007195
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Ad Libitum Use followed by Instructed Use of the Inspire Device, Instructed Use followed by Ad Libitum Use of the Inspire Device, Smart-T Smoking Cessation App with the Inspire Device Condition, Smart-T Smoking Cessation App Without the Inspire Device Condition, Nicotine replacement therapy (NRT), Inspire Device
Device · Drug
Lead sponsor
University of Houston
Other
Eligibility
18 Years and older
Enrollment
132 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Motivating Quitline Use Among Smokers in Treatment for Substance Use Disorders

NCT01882673
View directory record Official record
Conditions
Smoking Cessation
Interventions
Brief Computer Motivational Interviewing for Smoking Cessation, Nutrition Control
Behavioral
Lead sponsor
Butler Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jul 20, 2016 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Project CheckUP: A Brief Behavioral Intervention for Quitline Callers Who Use Marijuana (MJ) and Tobacco

NCT04737772
View directory record Official record
Conditions
Smoking Cessation, Marijuana Use
Interventions
Behavioral: Quitline treatment as usual, QL Marijuana Check-Up intervention (QL-MJCU)
Behavioral
Lead sponsor
Consumer Wellness Solutions
Industry
Eligibility
21 Years and older
Enrollment
107 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 27, 2025 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Phase 2 Interventional Results available

Computer-Assisted Intervention for Smoking During Pregnancy

NCT01028131
View directory record Official record
Conditions
Smoking
Interventions
Computer-delivered brief intervention (5As), Contingency Management
Behavioral
Lead sponsor
Wayne State University
Other
Eligibility
18 Years and older · Female only
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 10, 2013 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Smoking and Ventricular Repolarization

NCT03916341
View directory record Official record
Conditions
Sudden Cardiac Death, Prolonged QTc Interval
Interventions
EC with nicotine, EC without nicotine, control, TC with nicotine (own brand), research TC with very low level nicotine
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Oct 21, 2026, 6:40 PM EDT
Withdrawn Phase 2 Interventional

Electronic Nicotine Delivery Systems as a Smoking Cessation Treatment

NCT02487953
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Nicotine patch, ENDS, Placebo patch, Placebo ENDS
Drug · Other
Lead sponsor
Duke University
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 12, 2018 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Phase 2 Interventional

Pulmonary and Cardiac Effects of E-Cigarette Use in Pulmonary Patients Who Smoke Cigarettes

NCT05610514
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Chronic Bronchitis, Emphysema, Asthma-COPD Overlap Syndrome
Interventions
E-Cigarette, Financial Incentives
Other · Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
40 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Feb 8, 2024 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional

A Peer Navigator Model to Improve Quit Attempts and Smoking Cessation Rates Among HIV-positive Smokers

NCT04327921
View directory record Official record
Conditions
HIV
Interventions
Peer navigation social support for smoking cessation, Standard Condition
Behavioral
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Mar 2, 2022 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Results available

Implementation of HIT-Enhanced Tobacco Treatment for Hospitalized Smokers

NCT01691105
View directory record Official record
Conditions
Tobacco Use Cessation, Smoking Cessation, Smoking, Tobacco Use Disorder
Interventions
AD + Integrated Tobacco Order Set
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
1,044 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 5, 2021 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Point-of-Care Ultrasound (POCUS) Findings and Impact on Vaping

NCT06335329
View directory record Official record
Conditions
Vaping
Interventions
Discussion of point-of-care ultrasound lung findings
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
12 Years to 18 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vaping Prevention and Vaping in Youth (Vapechat)

NCT06003439
View directory record Official record
Conditions
Vaping, Smoking Cessation
Interventions
Virtual Reality Program, VR Program
Behavioral
Lead sponsor
Boston University
Other
Eligibility
13 Years to 19 Years
Enrollment
119 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 7, 2024 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mood and Smoking: A Comparison of Smoking Cessation Treatments

NCT00075972
View directory record Official record
Conditions
Smoking Cessation, Mood Tolerance, Mood Management, Nicotine Replacement Therapy
Interventions
Mood Tolearance, Mood Management, Nicotine Replacement therapy
Behavioral · Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
Not listed
Enrollment
128 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 26, 2015 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Assessing Top Down and Bottom Up Attention Mechanisms in Smokers Using Nicotine Nasal Spray

NCT01136642
View directory record Official record
Conditions
Drug Addiction, Nicotine Dependence
Interventions
Nicotrol
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 55 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Brief Computerized Feedback for Smokers in Recovery

NCT01325727
View directory record Official record
Conditions
Smoking
Interventions
Brief computerized feedback, Resources only (control)
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Midlothian, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 15, 2012 · Synced Oct 21, 2026, 6:40 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Identifying Student Opinion Leaders to Lead E-cigarette Interventions

NCT04083469
View directory record Official record
Conditions
E-Cig Use, Adolescent Behavior
Interventions
Peer-Led Peer-Elected Intervention, Adult-Led Intervention, Peer-Led Non-Elected Intervention
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
Not listed
Enrollment
686 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 7, 2020 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Community Intervention to Reduce Tobacco Use in Pregnant Women

NCT02083081
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Community level intervention
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
352 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Bethel, Alaska
Source: ClinicalTrials.gov public record
Updated Jun 28, 2022 · Synced Oct 21, 2026, 6:40 PM EDT
Completed Phase 4 Interventional

Behavioral Counseling for Alcohol Dependent Smokers (Nicotine Patch)

NCT00004551
View directory record Official record
Conditions
Alcoholism, Smoking
Interventions
nicotine replacement patch, mood management
Drug · Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2003
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 29, 2010 · Synced Oct 21, 2026, 6:40 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Rural Smoking Cessation

NCT06584929
View directory record Official record
Conditions
Smoking Cessation
Interventions
Nicoderm CQ nicotine patch, Nicorette Nicotine Lozenges
Drug
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
21 Years and older
Enrollment
544 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Oct 21, 2026, 6:40 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Integrating Financial Coaching and Smoking Cessation Coaching

NCT05154669
View directory record Official record
Conditions
Smoking
Interventions
Financial counseling, Nicotine Replacement Therapy Agent - Patches, Nicotine Replacement Therapy Agent - Lozenges, Nicotine Replacement Therapy Agent - Gum
Other · Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 100 Years
Enrollment
602 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 21, 2026, 6:40 PM EDT