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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: E-Cig Use Clear all
Recruiting Not applicable Interventional

Behavioral Intervention for Youth to Promote Vaping Cessation

NCT06765291
View directory record Official record
Conditions
Vaping, Vaping Teens, Nicotine Dependence
Interventions
QuitVaping, This is Quitting (TIQ)
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
14 Years to 19 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Jul 21, 2026, 7:11 AM EDT
Recruiting Not applicable Interventional

Adapting an Intervention for Vaping in Young Veterans

NCT06196489
View directory record Official record
Conditions
E Cigarette Use
Interventions
adapted vaping cessation intervention
Behavioral
Lead sponsor
Veterans Medical Research Foundation
Other
Eligibility
18 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Jul 21, 2026, 7:11 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, 7:11 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 Jul 21, 2026, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Developing E-liquid Product Standards (Sweet Spot Study)

NCT05864586
View directory record Official record
Conditions
Nicotine, Nicotine Vaping, E-cigarette Use
Interventions
Vaping study EC A, Vaping study EC B, Vaping study EC C, Vaping study EC D, Vaping study EC E, Vaping study EC F, Vaping study EC G, Vaping study EC H, Vaping study EC I, Vaping study EC J
Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 50 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 9, 2025 · Synced Jul 21, 2026, 7:11 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 Jul 21, 2026, 7:11 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

E-Cigarette Aerosol, Conventional Cigarette Smoke, and Myocardial Perfusion

NCT02612701
View directory record Official record
Conditions
Coronary Artery Disease, Myocardial Perfusion
Interventions
Cigarettes, E-cigarettes (nicotine free e-liquid), E-cigarettes (low nicotine e-liquid), E-cigarettes (high nicotine e-liquid)
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years to 49 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 3, 2021 · Synced Jul 21, 2026, 7:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Development and Evaluation of a Culturally Grounded ENDS Intervention for Rural Hawaiian Youth

NCT06929520
View directory record Official record
Conditions
E-cigarette Use, Substance Use
Interventions
ENDS Prevention Intervention (TBD)
Behavioral
Lead sponsor
University of Hawaii
Other
Eligibility
10 Years to 14 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jul 21, 2026, 7:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

e-Cigarette - DNA Adducts

NCT03284632
View directory record Official record
Conditions
Smoking, Cigarette Smoking, Electronic Cigarettes
Interventions
Not listed
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
217 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 8, 2022 · Synced Jul 21, 2026, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Point-of-Care Ultrasound (POCUS) Findings and Impact on Vaping

NCT06335329
View directory record Official record
Conditions
Vaping
Interventions
Discussion of point-of-care ultrasound lung findings
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
12 Years to 18 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Jul 21, 2026, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Abstinence From E-cigarettes Produce Withdrawal Symptoms?

NCT02825459
View directory record Official record
Conditions
Substance Withdrawal Syndrome
Interventions
Abstinence from e-cigarettes
Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
147 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
2
States / cities
Baltimore, Maryland • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Nov 19, 2018 · Synced Jul 21, 2026, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-cigarettes as a Harm Reduction Strategy

NCT06277271
View directory record Official record
Conditions
Smoking
Interventions
E-cigarette
Other
Lead sponsor
Prisma Health-Upstate
Other
Eligibility
21 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 30, 2024 · Synced Jul 21, 2026, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of e-Cigarettes on Perceptions and Behavior - Remote Substudy # 2

NCT05958992
View directory record Official record
Conditions
Electronic Cigarette Use, Cigarette Smoking, Cigarette Use, Electronic, Vaping
Interventions
E-cigarette
Other
Lead sponsor
University of Southern California
Other
Eligibility
21 Years and older
Enrollment
461 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Jul 21, 2026, 7:11 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, 7:11 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 Jul 21, 2026, 7:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

E-cigarette Nicotine Study

NCT04709471
View directory record Official record
Conditions
Nicotine Dependence, Electronic Cigarette Use, Cigarette Smoking
Interventions
Nicotine, Juul e-cigarette, Reduction
Drug · Device · Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
21 Years and older
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Aug 25, 2022 · Synced Jul 21, 2026, 7:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Evaluation of Short-term Safety and Use Patterns of an Electronic Nicotine Delivery System

NCT01898169
View directory record Official record
Conditions
Nicotine Dependence
Interventions
NJOY King 26 mg nicotine Electronic Nicotine Delivery System
Other
Lead sponsor
LA Clinical Trials
Other
Eligibility
18 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Burbank, California
Source: ClinicalTrials.gov public record
Updated Jul 11, 2013 · Synced Jul 21, 2026, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-cigarette Nicotine Pharmacokinetic Study

NCT03178981
View directory record Official record
Conditions
Healthy Volunteers, Smoking
Interventions
Use electronic cigarette or smoke conventional cigarette
Other
Lead sponsor
British American Tobacco (Investments) Limited
Industry
Eligibility
22 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Burbank, California
Source: ClinicalTrials.gov public record
Updated Dec 6, 2022 · Synced Jul 21, 2026, 7:11 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 Jul 21, 2026, 7:11 AM 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 Jul 21, 2026, 7:11 AM EDT
Terminated Phase 4 Interventional Results available

e-Cigarettes Versus NRT Gum for Smoking Cessation

NCT01925781
View directory record Official record
Conditions
Nicotine Addiction, Smoking Cessation
Interventions
Nicotine polacrilex, STAM 1100mAh CE4 eGo Clearomizer
Drug · Other
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 13, 2016 · Synced Jul 21, 2026, 7:11 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, 7:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of E-Liquid Flavor on Respiratory Symptoms in People Using Electronic Nicotine Delivery Systems

NCT05423340
View directory record Official record
Conditions
Electronic Cigarette Use
Interventions
E-cigarette Flavor, Tobacco Free Nicotine Pouch
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
21 Years to 55 Years
Enrollment
163 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jul 21, 2026, 7:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Adverse Airway Effects From Tobacco and E-Cigarettes

NCT03251053
View directory record Official record
Conditions
Airway Morbidity, Smoking Cessation, Nicotine Adverse Reaction, Smoking, Tobacco, Smoking, Cigarette
Interventions
Electronic cigarette use, Control regular cigarette smokers
Device · Other
Lead sponsor
Miami VA Healthcare System
Federal
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 15, 2017 · Synced Jul 21, 2026, 7:11 AM EDT