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Showing 1–24 of 397 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Cigarette Smoke Clear all
Withdrawn Phase 2 Interventional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 11, 2018 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Neurobiology of Nicotine and Non-nicotine Components of Tobacco Addiction

NCT01056926
View directory record Official record
Conditions
Smoking
Interventions
Quit smoking, Nicotine patch, Placebo Patch
Behavioral · Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years to 55 Years
Enrollment
147 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 30, 2017 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Connect to Quit for Smoking

NCT01299896
View directory record Official record
Conditions
Smoking, Smoking Cessation
Interventions
Coordinated Care, Usual Care
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
633 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 21, 2016 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cigarette and E-cigarette Nicotine Content in an Electronic Tobacco Marketplace (ETM)

NCT05320887
View directory record Official record
Conditions
Tobacco Use
Interventions
Normal Nicotine Content Vape with all flavor e-liquids, Normal nicotine content vape with tobacco e-liquids, Low nicotine content vape with all flavor e-liquids, Low nicotine content vape with tobacco e-liquids
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
21 Years and older
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 8, 2024 · Synced Sep 6, 2026, 6:30 AM EDT
Recruiting Phase 4 Interventional

Using Multiphase Optimization Strategy (MOST) to Optimize a Cost-effective, Sustainable and Scalable Smoking Cessation Package for Smokers in HIV Clinical Care

NCT06598397
View directory record Official record
Conditions
Human Immunodeficiency Virus (HIV), Smoking Cessation
Interventions
Motivational Interviewing (MI) Counseling, Peer Mentoring, Skills-based Text Messaging, Combination NRT
Behavioral · Drug
Lead sponsor
New York University
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 6, 2026, 6:30 AM EDT
Terminated Not applicable Interventional

Insulin Resistance in Smokers Undergoing Smoking Cessation

NCT00877513
View directory record Official record
Conditions
Cardiovascular Disease, Insulin Resistance
Interventions
Smoking cessation
Behavioral
Lead sponsor
Charles Drew University of Medicine and Science
Other
Eligibility
25 Years to 70 Years
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 10, 2014 · Synced Sep 6, 2026, 6:30 AM EDT
Completed No phase listed Observational

Alveolar Macrophage Proteomics in HIV-associated Emphysema

NCT00823927
View directory record Official record
Conditions
HIV, Emphysema, HIV Infections
Interventions
Not listed
Lead sponsor
Philip Diaz
Other
Eligibility
18 Years and older
Enrollment
365 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Sep 6, 2026, 6:30 AM 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 26, 2018 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional

Contingency Management for Smoking Cessation in the Homeless

NCT01736982
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Contingency Management, Standard of Care
Behavioral · Other
Lead sponsor
UConn Health
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
New Britain, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 15, 2018 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

HIV/STI Prevention Among Black Adolescents With Mental Illnesses (Project GOLD)

NCT03348813
View directory record Official record
Conditions
HIV, STI, Emotional Disturbances, Mental Disorder
Interventions
HIV/STI Prevention Intervention, General Health Control Intervention
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
14 Years to 17 Years
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 28, 2017 · Synced Sep 6, 2026, 6:30 AM EDT
Recruiting Not applicable Interventional

Cessation of Dual Use of Cigarettes and E-cigarettes During Pregnancy

NCT07124702
View directory record Official record
Conditions
Dual Use of Cigarettes and E-cigarettes, Gestational Weight Gain, Birth-weight-for-gestational-age z Score
Interventions
Simultaneous cessation intervention, Stepwise cessation intervention, Behavior counseling only
Behavioral
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older · Female only
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Nov 12, 2025 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional Results available

Financial Incentives for Smoking Cessation Among Mothers

NCT05740098
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Best Practices, Financial Incentives, Nicotine Replacement Therapy
Behavioral · Drug
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older · Female only
Enrollment
198 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Jul 27, 2023 · Synced Sep 6, 2026, 6:30 AM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Cannabis Consumption and Driving Impairment Assessment on a Closed Course

NCT06059677
View directory record Official record
Conditions
Cannabis Smoking, Driving Impaired
Interventions
Active smoked cannabis, Placebo smoked cannabis
Drug
Lead sponsor
Bayliss J. Camp, PhD
Government
Eligibility
21 Years to 55 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Comparing NicoBloc to Nicotine Lozenges

NCT03720899
View directory record Official record
Conditions
Smoking Cessation, Nicotine Dependence
Interventions
NicoBloc, Nicotine Lozenge
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 7, 2025 · Synced Sep 6, 2026, 6:30 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 6, 2026, 6:30 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

A Smoking Intervention Study Using Scheduled Gradual Reduction With Varenicline to Help With Cessation

NCT01772641
View directory record Official record
Conditions
Nicotine Addiction
Interventions
Scheduled Gradual Reduction + Varenicline, Scheduled Gradual Reduction + Placebo Drug, Basic Advice + Varenicline, Basic Advice + Placebo Drug
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 15, 2016 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Behavioral Intervention for Low Income Depressed Smokers in Drug Treatment

NCT01372254
View directory record Official record
Conditions
Cigarette Smoking, Drug Use
Interventions
Standard Treatment, BAD-AS, Transdermal Nicotine Patch
Behavioral · Drug
Lead sponsor
University of Maryland, College Park
Other
Eligibility
18 Years to 65 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated May 17, 2022 · Synced Sep 6, 2026, 6:30 AM EDT
Recruiting Not applicable Interventional

E-cigarettes for Harm Reduction Among Smokers With Serious Mental Illness

NCT05815199
View directory record Official record
Conditions
Cigarette Smoking
Interventions
E-cigarette (EC), Nicotine Replacement Therapy (NRT), Harm-Reduction Counseling, Ecological Momentary Intervention (EMI) Text Messaging
Other · Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 9, 2025 · Synced Sep 6, 2026, 6:30 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Novel vs. Usual Brand Menthol Cigarettes on Abuse Liability

NCT07564648
View directory record Official record
Conditions
Cigarette Addiction, Tobacco Use Disorder
Interventions
Biospecimen Collection, Questionnaire Administration, Cigarette Purchase Task, Cross-Price Elasticity Task, Daily Diary Surveys, Progressive Ratio Task
Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cigarette Smoking in Smokers With and Without Schizophrenia

NCT04001114
View directory record Official record
Conditions
Tobacco Dependence, Schizophrenia
Interventions
Sampling Research Cigarettes
Combination Product
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 60 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 25, 2024 · Synced Sep 6, 2026, 6:30 AM EDT
Recruiting Phase 3 Interventional

Reaching Rural Cancer Survivors Who Smoke Using Text-Based Program

NCT05008848
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Smoking Cessation Intervention, Health Promotion and Education, Informational Intervention, Questionnaire Administration
Behavioral · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
223
States / cities
Kingman, Arizona • Fort Smith, Arkansas • St. Helena, California + 186 more
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 6, 2026, 6:30 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Innovative Web-Based Intervention for Smoking Cessation Among College Students

NCT01982825
View directory record Official record
Conditions
Tobacco Use Cessation, Cigarette Smoking
Interventions
Online intervention arm, Online control arm
Behavioral
Lead sponsor
Emory University
Other
Eligibility
18 Years to 30 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 4, 2013 · Synced Sep 6, 2026, 6:30 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 Sep 6, 2026, 6:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparison of Internet Stop Smoking Intervention to Usual Care on Smoking Cessation at 6 Months

NCT01639079
View directory record Official record
Conditions
Cigarette Smoking, Nicotine Dependence
Interventions
Internet Smoking Cessation Web Site
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 90 Years
Enrollment
146 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Nov 14, 2018 · Synced Sep 6, 2026, 6:30 AM EDT