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Showing 1–24 of 436 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Tobacco Smokers Clear all
Completed Phase 4 Interventional Results available

Minocycline and Tobacco Craving in Smokers With Schizophrenia

NCT02968602
View directory record Official record
Conditions
Schizophrenia, Tobacco Use
Interventions
Minocycline, Placebo
Drug · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 5, 2022 · Synced Sep 18, 2026, 10:57 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Semaglutide for Post-Smoking Cessation Weight Management

NCT06173778
View directory record Official record
Conditions
Obesity, Overweight, Cigarette Smoking
Interventions
semaglutide 2.4mg, Placebo, Nicotine Replacement Therapy (NRT, nicotine patch), Brief Smoking Cessation Counseling
Drug · Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 75 Years
Enrollment
197 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
2
States / cities
Austin, Texas • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 10, 2026 · Synced Sep 18, 2026, 10:57 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 Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Results available

Smoking Cessation for Smokers With Sleep Problems

NCT01277887
View directory record Official record
Conditions
Nicotine Dependence, Cigarette Smoking, Insomnia
Interventions
Cognitive-Behavioral Counseling, Smoking Cessation Counseling
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 20, 2017 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Personalized Feedback for Smokers With Elevated Anxiety Sensitivity

NCT03382093
View directory record Official record
Conditions
Anxiety Disorders, Anxiety, Tobacco Dependence, Smoking, Cigarette, Smoking, Tobacco
Interventions
Personalized Feedback Intervention, Smoking Information Control
Behavioral
Lead sponsor
University of Houston
Other
Eligibility
18 Years to 65 Years
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 18, 2019 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Progesterone for Smoking Relapse Prevention Following Delivery

NCT01972464
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Progesterone, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 42 Years · Female only
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 16, 2018 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Results available

Promoting Oral Health Among Smokers Randomized Trial

NCT02347124
View directory record Official record
Conditions
Oral Disease, Smoking
Interventions
Usual Care Control, Enhanced Intervention
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
718 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 7, 2019 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Cessation Screening Project

NCT04188873
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Preparation Varenicline and Standard Duration Varenicline, Preparation Varenicline and Extended Duration Varenicline, Standard Duration Varenicline, Extended Duration Varenicline, Preparation Combination NRT and Standard Duration Combination NRT, Preparation Combination NRT and Extended Duration Combination NRT, Standard Duration Combination NRT, Extended Duration Combination NRT, Intensive Counseling, Minimal Counseling
Drug · Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
538 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 18, 2026, 10:57 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Use of Nicotine Pouches Among Daily Smokers

NCT06043362
View directory record Official record
Conditions
Tobacco Dependence
Interventions
0 mg nicotine pouch, 3 mg nicotine pouch, 6 mg nicotine pouch, Smooth nicotine pouch, Wintergreen nicotine pouch
Other
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
21 Years to 70 Years
Enrollment
375 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Hershey, Pennsylvania • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Sep 18, 2026, 10:57 AM 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 15, 2019 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Project Q Pilot: Smoking Cessation for Light Smokers

NCT03416621
View directory record Official record
Conditions
Tobacco Use Cessation
Interventions
Cognitive behavioral cessation counseling, Counseling and placebo drug intervention, Counseling and active drug intervention
Behavioral · Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 28, 2021 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tobacco Pilot Study for Low Income Smokers

NCT03017092
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Tablet-guided tobacco intervention
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 25, 2019 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Nicotine Pharmacokinetics From Research Electronic Nicotine Delivery System S-TA-U001 in Smokers and E-Cigarette Users

NCT02792426
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Research ENDS S-TA-U001, Nicorette Inhalator
Drug
Lead sponsor
NJOY, Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Burbank, California
Source: ClinicalTrials.gov public record
Updated May 16, 2018 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 2 Interventional Results available

Evaluation of Moclobemide, a Reversible MAO-A Inhibitor, as an Adjunct to Nicotine Replacement Therapy in Female Smokers

NCT01926626
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Nicotine Patch, Moclobemide
Drug
Lead sponsor
Jed E. Rose
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
3
States / cities
Charlotte, North Carolina • Durham, North Carolina • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 22, 2017 · Synced Sep 18, 2026, 10:57 AM EDT
Completed No phase listed Observational

Meriter Mindfulness Training for Smokers Program and Study

NCT02143752
View directory record Official record
Conditions
Smoking
Interventions
Mindfulness, Quit Line
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 17, 2023 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Results available

Switching to Potential Reduced Exposure Products in Adult Smokers

NCT04250727
View directory record Official record
Conditions
Tobacco Use Disorder, Oral Nicotine Pouch Use, Smoking Behaviors, Harm Reduction, Toxic Effect of Tobacco and Nicotine, Carcinogenesis
Interventions
ZYN
Device
Lead sponsor
Yale University
Other
Eligibility
21 Years to 77 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 30, 2024 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 2 Interventional

Progesterone Treatment in Female Smokers - 12

NCT00000295
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Micronized Progesterone
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
21 Years to 45 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2001
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

OCAST Cessation Study

NCT01921439
View directory record Official record
Conditions
Tobacco Smoking Behavior, Cigarette Smoking Behavior, Second Hand Tobacco Smoke, Tobacco Use Cessation
Interventions
Personalized Feedback
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 65 Years
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 10, 2017 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Phase 1Phase 2 Interventional

Antibody and Safety Study of 6 Doses of NicVAX in Smokers

NCT00598325
View directory record Official record
Conditions
Smoking
Interventions
3'-aminomethyl-Nic r-EPA Conjugate (NicVAX®)
Biological
Lead sponsor
Nabi Biopharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated May 8, 2012 · Synced Sep 18, 2026, 10:57 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 18, 2026, 10:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Nicotine and Cotinine Levels in Smokers With Schizophrenia and Schizoaffective Disorder - 2

NCT00135772
View directory record Official record
Conditions
Schizophrenia and Disorders With Psychotic Features, Tobacco Use Disorder
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2004
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 18, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Naltrexone and Patch for Smokers

NCT00018213
View directory record Official record
Conditions
Smoking
Interventions
Naltrexone Hydrochloride, Transdermal Nicotine
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
1998 – 2001
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jan 20, 2009 · Synced Sep 18, 2026, 10:57 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 18, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Acute Pharmacokinetic and Pharmacodynamic Effects of "Tobacco-Free" Oral Nicotine Pouches in Smokers

NCT05335915
View directory record Official record
Conditions
Nicotine Withdrawal, Nicotine Addiction, Drug Effect
Interventions
Nicotine, Cigarette
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 18, 2026, 10:57 AM EDT