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Showing 1–24 of 122 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Cigarette trial Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Quit Smoking Study for People Who Use E-Cigarettes

NCT04946825
View directory record Official record
Conditions
Nicotine Addiction, E-Cig Use, Quitting Smoking
Interventions
Nicotine replacement therapy patch, Nicotine replacement therapy lozenge, Quit electronic cigarettes, Continue electronic cigarettes
Drug · Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
18 Years to 29 Years
Enrollment
396 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated May 21, 2025 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Results available

A Pilot Randomized Controlled Trial of Financial Incentives, Text Messaging, and Usual Care for Homeless Smokers

NCT02565381
View directory record Official record
Conditions
Smoking
Interventions
Transdermal nicotine patch, In-person smoking cessation counseling, Contingent financial rewards for smoking abstinence, Text messages to support smoking abstinence
Drug · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 13, 2017 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cigarette Reduction Using the Quitbit Digital Lighter and Mobile Application for Smoking Cessation: a Randomized Controlled Trial

NCT02515500
View directory record Official record
Conditions
Smoking Cessation
Interventions
Gradual Cessation, Gradual Cessation w/ Quitbit
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 12, 2020 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Impact of E-cigarette Device Warnings

NCT05714982
View directory record Official record
Conditions
Vaping Behaviors
Interventions
Label with text health warning, Label with pictorial health warning, Label with neutral statements about vaping
Other
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
1,369 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 2, 2026, 9:49 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 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Results available

Trial on the Effect of E-cigarette Advertising on Cigarette Perceptions in Adolescents

NCT03786042
View directory record Official record
Conditions
Attentional Bias, Smoking Cues, Positive Perceptions About Cigarette Smoking, Social Norms, Smoking Susceptibility
Interventions
E-cigarette ad exposure, non e-cigarette TV commercials
Behavioral · Other
Lead sponsor
Trustees of Dartmouth College
Other
Eligibility
14 Years to 17 Years
Enrollment
139 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Sep 2, 2026, 9:49 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

An Educational Intervention (Lung Toolkit) for Improving Knowledge About Lung Cancer and Screening Among American Indian and Alaskan Native Cigarette Smokers, Lung PATHS Trial

NCT07615764
View directory record Official record
Conditions
Lung Carcinoma
Interventions
Educational Intervention, Interview, Questionnaire Administration
Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
50 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Early Phase 1 Interventional

Varenicline + Prazosin for Heavy Drinking Smokers

NCT02193256
View directory record Official record
Conditions
Cigarette Smoking, Alcohol Use Disorders
Interventions
Varenicline, Prazosin, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 11, 2020 · Synced Sep 2, 2026, 9:49 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Comprehensive Evaluation of Tobacco-Flavored vs. Non-Tobacco Flavored E-cigarettes on Smoking Behavior

NCT06260683
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Nicotine Replacement, Questionnaire Administration, Vaping
Drug · Other · Device
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
1,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Graphic Cigarette Warnings

NCT02247908
View directory record Official record
Conditions
Smoking
Interventions
Surgeon General's Warning, Graphic Warning
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
2,149 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
Oakland, California • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 13, 2016 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Methods Project 4: Clinical Trial

NCT01867242
View directory record Official record
Conditions
Smoker
Interventions
Cigarettes, Snus
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
3
States / cities
Minneapolis, Minnesota • Buffalo, New York • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 2, 2026, 9:49 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Enhancing Smoking Cessation Via Telehealth Options in Primary Care

NCT05493254
View directory record Official record
Conditions
Smoking Cessation
Interventions
Smoking cessation e-visit, Treatment As Usual
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
672 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Mar 4, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Low Nicotine Cigarettes Plus Electronic Cigarettes

NCT04058717
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Normal Nicotine Content research cigarettes, High Nicotine e-cigarette, Very Low Nicotine Content research cigarettes, Zero Nicotine e-cigarette
Other
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
21 Years to 70 Years
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 10, 2025 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

The Impact and Detection of Driving Impairments Associated With Acute Cannabis Smoking

NCT02849587
View directory record Official record
Conditions
Cannabis Intoxication
Interventions
Cannabis
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 55 Years
Enrollment
199 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 3, 2022 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Cigarette Pack Constituent Disclosures

NCT02785484
View directory record Official record
Conditions
Cigarette Smoking Behavior
Interventions
Label with constituent disclosure message, Label with litter message
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years and older
Enrollment
784 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 7, 2017 · Synced Sep 2, 2026, 9:49 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Trial of a Harm Reduction Strategy for People With HIV Who Smoke Cigarettes

NCT05642715
View directory record Official record
Conditions
Hiv, Tobacco Use
Interventions
EX+, Varenicline, HR, TAU
Behavioral · Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
40 Years to 79 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Clinical Trial of an Innovative Digital Therapeutic for Smoking Cessation With Biochemical Verification

NCT05440721
View directory record Official record
Conditions
Nicotine Addiction, Drug Addiction, Drug Dependence, Substance Use Disorder, Tobacco Dependence
Interventions
Treatment A with device Clickotine® (Active intervention), Treatment B with smoking education (control)
Device
Lead sponsor
Click Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 30, 2022 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dual Use of ENDS and Combustible Cigarettes

NCT05280535
View directory record Official record
Conditions
Smoking, Cigarette, Electronic Cigarette Use
Interventions
Cue Reactivity Task, Computerized Visual Dot Probe, Choice Task
Behavioral
Lead sponsor
Brown University
Other
Eligibility
21 Years to 34 Years
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tobacco/Nicotine Purchase Patterns Across SES

NCT06795997
View directory record Official record
Conditions
Smoking Behaviors, Smoking, Non-Tobacco Products, Smoking, Cigarette
Interventions
Tax Conditions, Control Condition
Behavioral
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
18 Years and older
Enrollment
663 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated May 20, 2025 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

The Effects of Combination Zonisamide and Bupropion on Switching to an Electronic Cigarette

NCT05205811
View directory record Official record
Conditions
Smoking Cessation
Interventions
Bupropion, Zonisamide, Placebo bupropion, Placebo zonisamide, E-cigarette
Drug · Other
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
2
States / cities
Charlotte, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional

A Clinical Trial to Evaluate the Effects of EMF Protection Devices on Sleep and Energy Levels

NCT07746011
View directory record Official record
Conditions
Sleep Disturbance, Insomnia, Fatigue, Electromagnetic Field Exposure
Interventions
EMF Protection
Device
Lead sponsor
Life Harmony Energies, Inc.
Industry
Eligibility
30 Years to 60 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Media Literacy for High School Tobacco Prevention

NCT05120466
View directory record Official record
Conditions
Adolescent Behavior, Tobacco Use, E-Cig Use
Interventions
AD IT UP media literacy intervention, Usual health education curriculum
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
13 Years to 17 Years
Enrollment
147 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 1, 2024 · Synced Sep 2, 2026, 9:49 AM EDT
Recruiting Not applicable Interventional

A Novel Dialectical Behavior Therapy Brief Group Intervention for Cigarette Smoking by Patients With Cancer: An Open Clinical Trial

NCT07119489
View directory record Official record
Conditions
Smoking Behavior
Interventions
Dialectical Behavior Therapy -Skill Training brief intervention
Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
2
States / cities
Charlotte, North Carolina • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 2, 2026, 9:49 AM EDT
Completed Not applicable Interventional Results available

Efficacy of a Smoke-Free Homes Intervention

NCT04547686
View directory record Official record
Conditions
Cessation, Smoking
Interventions
Smoke-Free Homes Intervention, Quitline
Behavioral
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
916 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 17, 2026 · Synced Sep 2, 2026, 9:49 AM EDT