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Showing 1–24 of 116 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Low nicotine cigarettes Clear all
Completed Phase 1 Interventional Results available

Effects of E-Cigarette Flavors on Adults TCORS 2.0

NCT03635333
View directory record Official record
Conditions
Nicotine Use Disorder
Interventions
Nicotine, Flavor
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 50 Years
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 8, 2026, 2:30 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 8, 2026, 2:30 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 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Results available

Effects of Narratives on Demand for Low and High Ventilated Cigarettes and Substitution for Alternative Products

NCT05487625
View directory record Official record
Conditions
Cigarette Smoking
Interventions
High-ventilated cigarette alone, Low-ventilated cigarette alone, High- and low-ventilated cigarette with high-ventilated cigarettes increasing in price, Low- and high-ventilated cigarette with high-ventilated cigarettes increasing in price, Usual, high- and low-ventilated cigarette with usual cigarettes increasing in price.
Behavioral
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
21 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 1, 2025 · Synced Sep 8, 2026, 2:30 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 8, 2026, 2:30 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Comparisons of Nicotine-free Cigarettes, Extra Low Nicotine Cigarettes vs. Medicinal Nicotine

NCT00777569
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Nicotine free cigarettes, Extra-low nicotine cigarettes, Nicotine Lozenge
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 70 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 15, 2017 · Synced Sep 8, 2026, 2:30 AM EDT
Recruiting Not applicable Interventional

Opioids, Low Nicotine Cigarettes, and Chronic Pain

NCT06747871
View directory record Official record
Conditions
Chronic Pain, Tobacco Use, Opioid Substitution Treatment
Interventions
Very Low Nicotine Cigarettes (VLNC), Normal Nicotine Cigarettes (NNC)
Behavioral
Lead sponsor
Duke University
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Results available

Impact of E-cigarette Characteristics on Reinforcement and Tobacco Use Patterns

NCT03844672
View directory record Official record
Conditions
Smoking, Tobacco Use
Interventions
Low Power, High Power, Low Concentration, High Concentration
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 23, 2024 · Synced Sep 8, 2026, 2:30 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 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Results available

Evaluating E-Cigarette Nicotine Form, Concentration, and Flavors Among Youth

NCT05458895
View directory record Official record
Conditions
E-cigarette Use
Interventions
ECIG lab session 1, ECIG lab session 2, ECIG lab session 3, ECIG lab session 4, ECIG lab session 5, ECIG lab session 6, ECIG lab session 7, ECIG lab session 8
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 25 Years
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 21, 2024 · Synced Sep 8, 2026, 2:30 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 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tobacco Product Susceptibility and Substitutability by Rurality and Alcohol Use

NCT07010601
View directory record Official record
Conditions
Alcohol Use, E-cigarette Use, Cigarette Use
Interventions
Experimental Tobacco Marketplace, Hypothetical Novel Nicotine Product Purchase Tasks
Behavioral
Lead sponsor
Mark J Rzeszutek, PhD
Other
Eligibility
21 Years and older
Enrollment
737 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 8, 2026, 2:30 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Effect of Cannabis on E-Cigarette Use Behavior

NCT06609109
View directory record Official record
Conditions
Cannabis Use, Tobacco Use, Electronic Cigarette Use
Interventions
THC High Dose, THC Low Dose, THC 0mg, E-Cigarette Full Nicotine, E-Cigarette Placebo Nicotine
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Impact of Nicotine Reduction on Adolescent Cigarette Use, Alternative Tobacco Use, and Harm From Tobacco

NCT03860077
View directory record Official record
Conditions
Nicotine Dependence, Cigarettes, Uncomplicated
Interventions
Very Low Nicotine Content Cigarettes, Normal Nicotine Content Cigarettes
Drug
Lead sponsor
Brown University
Other
Eligibility
15 Years to 20 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Dec 18, 2023 · Synced Sep 8, 2026, 2:30 AM EDT
Withdrawn Not applicable Interventional

Understanding Factors That Influence Electronic Cigarette Nicotine Delivery Through PET Imaging of Beta-2 Nicotinic Acetylcholine Receptors

NCT04258852
View directory record Official record
Conditions
Electronic Cigarette Use
Interventions
Low strength nicotine e-liquid, High strength nicotine e-liquid
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 55 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 15, 2024 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Switching to Very Low Nicotine Content Cigarettes vs Reducing Cigarettes Per Day

NCT03060083
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Very low nicotine content (VLNC) cigarettes and nicotine replacement therapy (NRT), Reduce cigarettes per day (CPD) with nicotine replacement therapy (NRT)
Other
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Oct 3, 2022 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Results available

Correcting Public Misperceptions About Very Low Nicotine Content Cigarettes

NCT04974489
View directory record Official record
Conditions
Tobacco Use, Cigarette Use
Interventions
Emotion-based messages about the harm of VLNC, Continued-harm-framed messages about the harm of VLNC, Myth-refuting messages about the harm of VLNC, Control messages about littering
Behavioral
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
1,153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 7, 2022 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Phase 2 Interventional

Very Low-Nicotine Cigarettes in Smokers With SUD

NCT01989507
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Nicotine, behavioral counseling for smoking cessation
Drug · Behavioral
Lead sponsor
Brown University
Other
Eligibility
18 Years to 75 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Sep 8, 2026, 2:30 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Melanin and Dermal Uptake of Thirdhand Cigarette Smoke

NCT06020248
View directory record Official record
Conditions
Healthy
Interventions
Wear clothing that has been exposed to cigarette smoke for 3 hours.
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 50 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Project 3, Study 2: Extended Exposure to Low Nicotine Content Cigarettes in People With Current Affective Disorders

NCT02232737
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Very low nicotine content cigarettes
Other
Lead sponsor
Brown University
Other
Eligibility
18 Years to 70 Years
Enrollment
775 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
2
States / cities
Providence, Rhode Island • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Dec 6, 2022 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Project 2 Cigarette and E-cigarette Nicotine Content and E-liquid Flavors

NCT03185546
View directory record Official record
Conditions
Smoking
Interventions
NNC Spectrum Cigarette, VLNC Spectrum Cigarette, Moderate nicotine level e-liquid, Low nicotine level e-liquid, Tobacco Flavors, Tobacco and non-tobacco e-liquid flavors
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
2
States / cities
Winston-Salem, North Carolina • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 13, 2021 · Synced Sep 8, 2026, 2:30 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Communicating About Nicotine Reduction in Cigarettes

NCT06787937
View directory record Official record
Conditions
Tobacco Products, Smoking Behavior, Cigarette Use
Interventions
VLNC messages, Control message
Behavioral
Lead sponsor
Georgia State University
Other
Eligibility
21 Years and older
Enrollment
1,230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Improving Quitline Support Study

NCT03538938
View directory record Official record
Conditions
Tobacco Use Cessation
Interventions
1-Call Quitline Counseling, 4-Call Quitline Counseling, Nicotine patch, Nicotine Patch and Nicotine Lozenge, SmokefreeTXT, No SmokefreeTXT, Financial Incentives for Treatment Engagement, No Financial Incentives for Treatment Engagement
Behavioral · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
1,316 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 11, 2024 · Synced Sep 8, 2026, 2:30 AM EDT
Completed Not applicable Interventional Results available

Working Memory Training on Delay Discounting Among Cigarette Smokers

NCT05210608
View directory record Official record
Conditions
Tobacco Use Disorder/Cigarette Smoking
Interventions
Working Memory Training + Behavioral Intervention
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 23, 2025 · Synced Sep 8, 2026, 2:30 AM EDT