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Showing 1–24 of 1,021 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Cigarettes 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, 2:17 PM EDT
Completed Not applicable Interventional Results available

RCT of an Internet Cessation Program Plus Online Social Network for HIV+ Smokers

NCT02781090
View directory record Official record
Conditions
Tobacco Use Disorder, HIV
Interventions
PSFW+, AHA, Nicotine polacrilex
Behavioral · Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
512 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
2
States / cities
Baltimore, Maryland • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Aug 3, 2023 · Synced Sep 2, 2026, 2:17 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

E-Cigarette Effects on Markers of Cardiovascular and Pulmonary Disease

NCT03863509
View directory record Official record
Conditions
Tobacco Use, E-Cigarette Use, Cardiovascular Diseases, Pulmonary Disease
Interventions
Cigarettes, E-Cigarettes
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
450 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 20, 2023 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nicotine Uptake, Measures of Abuse Liability, and Puffing Topography With Use of RELX ENDS Products by Smokers

NCT04640285
View directory record Official record
Conditions
Electronic Cigarette Use
Interventions
RELX ENDS Tobacco Flavor, RELX ENDS Menthol Flavor, Usual Brand Cigarette, Nicorette White Ice Mint nicotine polacrilex gum
Other
Lead sponsor
Cheerain HK Limited
Industry
Eligibility
22 Years to 59 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 23, 2021 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Early Phase 1 Interventional Results available

Effects of Flavors on Nicotine Reinforcement in Smokers

NCT03243630
View directory record Official record
Conditions
Nicotine Dependence
Interventions
IV nicotine, Menthol flavor, green apple, green apple and menthol
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 30 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 2, 2020 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Smoking Topography and Harm Exposure in Menthol Cigarettes

NCT01329263
View directory record Official record
Conditions
Cigarette Smoking Toxicity
Interventions
Menthol to non-menthol
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 65 Years
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 5, 2015 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Vaporized Nicotine and Autonomic Control

NCT04613609
View directory record Official record
Conditions
Electronic Cigarette Use
Interventions
Electronic Cigarette containing nicotine, Electronic Cigarette without nicotine
Device
Lead sponsor
Michigan Technological University
Other
Eligibility
21 Years to 40 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houghton, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Sep 2, 2026, 2:17 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Correcting Disinformation About Menthol Cigarettes and Flavored Cigars

NCT07543081
View directory record Official record
Conditions
Disinformation, Menthol Cigarettes, Flavored Cigars
Interventions
Individual delivery of anti-disinformation messaging, Community delivery of anti-disinformation messaging
Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 2, 2026, 2:17 PM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Nicotine Pouch Pharmacokinetics Abuse Liability

NCT07476144
View directory record Official record
Conditions
Smoking Behaviors
Interventions
Participants will place the pouch between their top lip and their gum for 30 minutes as per use instructions.
Drug
Lead sponsor
JT International SA
Industry
Eligibility
22 Years to 65 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
2
States / cities
Knoxville, Tennessee • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 2, 2026, 2:17 PM EDT
Recruiting Phase 4 Interventional

Modifying Progesterone and Estradiol Levels to Prevent Postpartum Cigarette Smoking Relapse and Reduce Secondhand Smoke Exposure in Infants and Children

NCT04783857
View directory record Official record
Conditions
Smoking, Smoking Cessation, Smoking Reduction
Interventions
Progesterone 200 MG Oral Capsule
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
171 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Study of a Smartphone-Based Vaping Cessation Program

NCT05642598
View directory record Official record
Conditions
Vaping Cessation
Interventions
Pivot for Vape
Behavioral
Lead sponsor
Pivot Health Technologies Inc.
Industry
Eligibility
21 Years and older
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
San Carlos, California
Source: ClinicalTrials.gov public record
Updated Jan 30, 2025 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Results available

E-cigarettes for Harm Reduction in Adults With Asthma

NCT05278065
View directory record Official record
Conditions
Smoking, Asthma, Electronic Cigarette Use, Cigarette Smoking
Interventions
Nicotine
Other
Lead sponsor
Brown University
Other
Eligibility
21 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Nov 17, 2025 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

BAT3221032: A Study to Evaluate the Effects of Switching From Cigarette Smoking to Using One of Five Variants of a Heated Tobacco Product on Biomarkers of Exposure and Biomarkers of Potential Harm in Healthy Subjects

NCT05142436
View directory record Official record
Conditions
Smoking, Tobacco Use, Tobacco Smoking
Interventions
Product A: Non-Combusted Cigarette Variant 42001402 and product use Mode B, Product B: Non-Combusted Cigarette Variant 42001399 and product use Mode B, Product C: Non-Combusted Cigarette Variant 42001401 and product use Mode B, Product D: Non-Combusted Cigarette Variant 40007386 and product use Mode B, Product E: Non-Combusted Cigarette Variant 42001402 and product use Mode A
Other
Lead sponsor
British American Tobacco (Investments) Limited
Industry
Eligibility
26 Years to 55 Years
Enrollment
806 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
18
States / cities
Bentonville, Arkansas • Little Rock, Arkansas • Rogers, Arkansas + 14 more
Source: ClinicalTrials.gov public record
Updated Dec 15, 2022 · Synced Sep 2, 2026, 2:17 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Usability and Pilot Testing - Intervention for Smoking Cessation

NCT02955095
View directory record Official record
Conditions
Smoking, Smoking Cessation
Interventions
Quit Smoking Phone Application
Device
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 24 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 8, 2018 · Synced Sep 2, 2026, 2:17 PM EDT
Not listed Not applicable Interventional

Mobile Smoking Treatment for Spanish-speaking Latinx Smokers

NCT04417075
View directory record Official record
Conditions
Smoking Cessation
Interventions
Impacto (Mobile App), Dejar de Fumar Asistente (Mobile App)
Behavioral
Lead sponsor
University of Houston
Other
Eligibility
18 Years to 55 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cooling Agent Pilot Among Adult Menthol Smokers

NCT06477601
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Assigning cooling agent type cigarettes, Assigning traditional tobacco type cigarettes, Assigning menthol type cigarettes
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
21 Years and older
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 5, 2025 · Synced Sep 2, 2026, 2:17 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

Risk and Benefits of Electronic Cigarettes to Older Smokers at High Risk for Lung Cancer

NCT05144542
View directory record Official record
Conditions
Lung Carcinoma
Interventions
Nicotine Replacement
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
50 Years to 80 Years
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 2, 2026, 2:17 PM 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, 2:17 PM EDT
Completed Not applicable Interventional

Short Term Effects of Electronic Cigarettes in Tobacco Dependent Adults

NCT02498145
View directory record Official record
Conditions
Smoking, Nicotine Dependence
Interventions
Nicotine e-cigarette, Non-nicotine e-cigarette
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

CSD201001: Study to Assess Elements of Abuse Liability for Three Nicotine Pouches

NCT05129657
View directory record Official record
Conditions
Smoking, Tobacco Use, Tobacco Smoking
Interventions
Product A, Product B, Product C, Product D, Product N
Other
Lead sponsor
RAI Services Company
Industry
Eligibility
21 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
2
States / cities
Raleigh, North Carolina • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 29, 2024 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Neural Basis of Cue-Elicited Cigarette Craving and Its Control

NCT01048957
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Real Time Feedback Training
Behavioral
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 50 Years
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Sep 2, 2026, 2:17 PM EDT
Suspended No phase listed Observational Accepts healthy volunteers

Patients' Attitudes Toward and Experiences With Buprenorphine Treatment

NCT05121428
View directory record Official record
Conditions
Opioid-use Disorder, Acceptability of Health Care, Opioid-Related Disorders
Interventions
Not listed
Lead sponsor
Cambridge Health Alliance
Other
Eligibility
18 Years and older
Enrollment
817 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 10, 2025 · Synced Sep 2, 2026, 2:17 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Cannabis Administration Routes on Human Performance and Pharmacokinetics

NCT02177513
View directory record Official record
Conditions
Cannabis Use
Interventions
Placebo + Placebo, Oral Cannabis + Placebo, Placebo + Inhaled Cannabis, Placebo + Smoked Cannabis, 6.9% cannabis oral
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 50 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Sep 2, 2026, 2:17 PM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition

NCT02404688
View directory record Official record
Conditions
Cannabis, Alcohol Effect, Driving Under the Influence of Alcohol and Other Drugs
Interventions
Active delta-9-THC, Placebo, Active Ethanol
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 55 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2026
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 2, 2026, 2:17 PM EDT