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Showing 1–24 of 175 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Nicotine Dependence, Cigarettes Clear all
Completed No phase listed Observational Accepts healthy volunteers

Effects of Nicotine on Areas of Impaired and Preserved Functioning in Schizophrenia

NCT01034085
View directory record Official record
Conditions
Nicotine Dependence, Schizophrenia
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 55 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jul 21, 2026, 11:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Digital Intervention (ACT on Vaping App) for Vaping Cessation in Young Adult E-Cigarette Users

NCT06909500
View directory record Official record
Conditions
Nicotine Dependence, Tobacco-Related Carcinoma
Interventions
Smartphone app, Text Message, Survey Administration
Behavioral · Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years to 30 Years
Enrollment
1,178 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational

Electronic Cigarette Use During Pregnancy

NCT03480373
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Not listed
Lead sponsor
UConn Health
Other
Eligibility
16 Years to 45 Years · Female only
Enrollment
182 participants
Timeline
2018 – 2023
U.S. locations
6
States / cities
Denver, Colorado • Farmington, Connecticut • Hartford, Connecticut + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Low Nicotine Content Cigarettes in Vulnerable Populations: Affective Disorders

NCT04090879
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Either normal nicotine content cigarettes (15.8mg/g) or reduced nicotine content cigarettes (0.4mg/g), E-Cigarettes
Other
Lead sponsor
Brown University
Other
Eligibility
18 Years to 70 Years
Enrollment
326 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
2
States / cities
Providence, Rhode Island • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Mar 31, 2025 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pharmacokinetics and Pharmacodynamics of Nicotine With Use of Standardized Research Electronic Cigarette (SREC)

NCT05658471
View directory record Official record
Conditions
Nicotine Dependence, Tobacco Toxicity, Cardiovascular Risk Factors
Interventions
Standardized Research E-Cigarette (SREC), Over the Counter E-Cigarette (EC), Biological Samples, Smoking-related Questionnaires
Other · Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 70 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Jul 21, 2026, 11:11 AM 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 Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Hormones and Reduction in Co-users of Marijuana and Nicotine

NCT02579421
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Progesterone, placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 60 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 2 Interventional Results available

The Role of Nicotine Dose and Route of Delivery in Affecting Adoption of E-cigarettes and Reducing Exposure to Toxic Combustion Products

NCT03492463
View directory record Official record
Conditions
Nicotine Dependence, Cigarettes
Interventions
Nicotine patch, Placebo patch, E-cigarettes, Non-nicotine e-cigarettes
Drug · Other
Lead sponsor
Duke University
Other
Eligibility
18 Years to 65 Years
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Vaping High vs. Low Nicotine E-Liquid

NCT04047836
View directory record Official record
Conditions
Cardiovascular Risk Factor, Nicotine Dependence
Interventions
Low Nicotine E-Liquid, Medium or High Nicotine E-Liquid
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
2
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 21, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-Cigarettes and SNA

NCT02724241
View directory record Official record
Conditions
Nicotine Dependence
Interventions
one time exposure to e-cig with nicotine, One time exposure to e-cigarette without nicotine, one time exposure to empty e-cigarette
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 19, 2021 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effectiveness of Using Reduced Nicotine Cigarettes in Men and Women Smokers to Combat Nicotine Addiction

NCT00264342
View directory record Official record
Conditions
Nicotine Dependence, Tobacco Use Disorder
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 70 Years
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 22, 2013 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Impact of Very Low Nicotine Content Cigarettes in a Complex Marketplace

NCT03272685
View directory record Official record
Conditions
Tobacco Smoking, Nicotine Dependence
Interventions
Very Low Nicotine Content Cigarettes, Normal Nicotine Content Cigarettes
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
21 Years and older
Enrollment
799 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
6
States / cities
San Francisco, California • Minneapolis, Minnesota • Durham, North Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Effects of Menthol in E-cigarettes on Smoking Behaviors

NCT04521647
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Nicotine
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 65 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pilot Study of Transcranial Magnetic Stimulation (TMS) in Nicotine Addiction

NCT01031693
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Transcranial Magnetic Stimulation
Device
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 65 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
2
States / cities
Baltimore, Maryland • Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Imaging Extrastriatal Dopamine Release in Tobacco Smokers and Nonsmokers

NCT02348385
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Amphetamine
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2017
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Incentives for Oklahoma Tobacco Helpline Engagement in Persistent Poverty Counties

NCT05095779
View directory record Official record
Conditions
Cigarette Smoking, Nicotine Dependence
Interventions
Coaching calls, Nicotine replacement therapy, Financial Incentives
Behavioral · Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years and older
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Dec 29, 2024 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Little Cigar and Cigarillo Warnings for Youth

NCT06413797
View directory record Official record
Conditions
Little Cigars and Cigarillos (LCC) Use
Interventions
FDA warnings + Image, FDA Warnings Text-Only, Surgeon General Text-Only Warnings
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
15 Years to 20 Years
Enrollment
928 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Results available

A Study to Help People Quit Smoking.

NCT01880099
View directory record Official record
Conditions
Nicotine Dependence
Interventions
placebo, Galantamine 8mg, Galantamine 16mg
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 22, 2020 · Synced Jul 21, 2026, 11:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Control Systems Approach to Predicting Individualized Dynamics of Nicotine Cravings

NCT02643914
View directory record Official record
Conditions
Nicotine Addiction, Cigarette Smoking
Interventions
Nicotine, MR Compatible Nicotine Delivery Device
Drug · Device
Lead sponsor
Stony Brook University
Other
Eligibility
21 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 21, 2026, 11:11 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 Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-cigarettes, Nicotine Inhaler, and Blood Vessel Function

NCT03072628
View directory record Official record
Conditions
Nicotine Dependence
Interventions
e-cig with nicotine, e-cig without nicotine, nicotine inhaler, sham control
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
148 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effects of Menthol as Delivered by an Electronic Cigarette on the Desirability of Nicotine in Tobacco Users

NCT02102100
View directory record Official record
Conditions
Nicotine Dependence
Interventions
nicotine, menthol
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 30 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 18, 2020 · Synced Jul 21, 2026, 11:11 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Sex Differences in E-Cigarette Perception

NCT07398976
View directory record Official record
Conditions
Nicotine Dependence, E-cigarette Use
Interventions
Nicotine Level 1 (0mg/ml), Nicotine Level 2 (36mg/ml), Nicotine Level 3 (59mg/ml)
Other
Lead sponsor
Yale University
Other
Eligibility
21 Years to 44 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Smoking Cessation Self-Help for Dual Users of Tobacco Cigarettes and E-Cigarettes

NCT02416011
View directory record Official record
Conditions
Smoking Cessation
Interventions
GENERIC, eTARGET
Behavioral
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
2,896 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Feb 22, 2022 · Synced Jul 21, 2026, 11:11 AM EDT