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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: E-cig use Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Smoking and Ventricular Repolarization

NCT03916341
View directory record Official record
Conditions
Sudden Cardiac Death, Prolonged QTc Interval
Interventions
EC with nicotine, EC without nicotine, control, TC with nicotine (own brand), research TC with very low level nicotine
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

E-cigarettes and Blood Vessel Function

NCT02740595
View directory record Official record
Conditions
Nicotine Dependence
Interventions
one time exposure to e-cig with nicotine, one time exposure to e-cig without nicotine, one time exposure to empty e-cig
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 45 Years
Enrollment
148 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Methods Project 4: Clinical Trial - Amended

NCT03111537
View directory record Official record
Conditions
Tobacco Smoking
Interventions
Cigarettes, E-Cigarette, Nicotine Gum or Lozenge
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
264 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
3
States / cities
Minneapolis, Minnesota • Buffalo, New York • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 27, 2022 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Virtual Reality Game to Prevent E-cigarette and Cannabis Vaping

NCT07413432
View directory record Official record
Conditions
Cannabis, Vaping, Emotion Regulation
Interventions
Virtual reality videogame intervention for vaping prevention
Behavioral
Lead sponsor
Yale University
Other
Eligibility
11 Years to 15 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 26, 2026, 3:14 AM EDT
Recruiting Not applicable Interventional

Electronic Cigarettes as a Harm Reduction Strategy Among People With Opioid Use Disorder on Buprenorphine

NCT07202039
View directory record Official record
Conditions
Tobacco-flavored EC, Sweet-Cooling EC, Sweet Non-cooling EC
Interventions
Brief individual counseling sessions
Behavioral
Lead sponsor
Prisma Health-Upstate
Other
Eligibility
21 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Electronic Cigarette Use on Cough Reflex Sensitivity

NCT02203162
View directory record Official record
Conditions
Cough
Interventions
electronic cigarette exposure
Device
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 26, 2026, 3:14 AM EDT
Not listed Not applicable Interventional

The Effect of Electronic Cigarette Use on Smoking Behaviors Among Smokers Receiving Outpatient Psychiatric Treatment

NCT04014322
View directory record Official record
Conditions
Tobacco Smoking, Psychiatric Disorders
Interventions
E-cigarette
Other
Lead sponsor
Fordham University
Other
Eligibility
21 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 17, 2023 · Synced Sep 26, 2026, 3:14 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 Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of E-Cigarettes in Menthol Smokers

NCT05949034
View directory record Official record
Conditions
E-cigarette Use, Smoking Behaviors
Interventions
JUUL E-Cigarette Device
Device
Lead sponsor
University of Southern California
Other
Eligibility
21 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 19, 2023 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Phase 1Phase 2 Interventional

The Role of Nicotine and Non-Nicotine Alkaloids in E-Cigarette Use and Dependence

NCT02590393
View directory record Official record
Conditions
Nicotine Dependence
Interventions
E-cigarettes
Combination Product
Lead sponsor
Duke University
Other
Eligibility
21 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 20, 2024 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Responses to E-Cigarette Advertising

NCT04249219
View directory record Official record
Conditions
E-Cig Use
Interventions
Viewing e-cigarette ads
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 26 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Sep 26, 2026, 3:14 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 Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nicotine and Tobacco Message Framing to Change Smoking Behavior in Diverse Groups of Young Adult Smokers

NCT06644664
View directory record Official record
Conditions
Tobacco-Related Carcinoma
Interventions
Health Education, Interview, Smoking Cessation Intervention, Survey Administration, Text Message-Based Navigation Intervention
Behavioral · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years to 35 Years
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Enhanced E-cigarette Coaching Intervention for Dual Users of Cigarettes and E-cigarettes

NCT03575468
View directory record Official record
Conditions
Smoking Cessation
Interventions
Enhanced E-cigarette Coaching, Quitline treatment as usual
Behavioral
Lead sponsor
Consumer Wellness Solutions
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 15, 2023 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Smartphone Application (ACT on Vaping) for Vaping Cessation in Young Adults

NCT05897242
View directory record Official record
Conditions
Nicotine Dependence, Nicotine Addiction, Nicotine Use Disorder, Nicotine Vaping, Vaping
Interventions
Smartphone app, Text Message, Survey Administration
Behavioral · Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years to 30 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 23, 2025 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Assessment of Two New Electronic Cigarettes in Cigarette Smokers

NCT03435562
View directory record Official record
Conditions
Electronic Cigarettes
Interventions
JUUL electronic cigarette, IQOS electronic cigarette, Own Brand cigarette
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
21 Years to 55 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 2, 2020 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Results available

Effects of Cigarette and E-cigarette Flavors on Substitutability in the ETM

NCT06910202
View directory record Official record
Conditions
Cigarette Smoking Behavior
Interventions
Manipulation of nicotine/tobacco product price and availability
Behavioral
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
21 Years to 65 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Roanoke, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 8, 2025 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Combination of E-cigarettes and Varenicline for Tobacco Harm Reduction

NCT04210180
View directory record Official record
Conditions
Smoking Cessation, Harm Reduction
Interventions
Varenicline, e-cigarette
Drug · Other
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
2
States / cities
Charlotte, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 23, 2022 · Synced Sep 26, 2026, 3:14 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 Sep 26, 2026, 3:14 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

A Novel Smartphone Application for Helping Teens Stop Vaping, QuitQuest Vaping R01

NCT07739706
View directory record Official record
Conditions
Tobacco-Related Carcinoma
Interventions
Smartphone Application-based Intervention, Survey Administration, Interview
Behavioral · Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
13 Years to 17 Years
Enrollment
1,072 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

User Acceptability of a Nicotine Lactate Delivery System (P3L)

NCT02643693
View directory record Official record
Conditions
Smoking
Interventions
P3L, VUSE, CC
Other
Lead sponsor
Philip Morris Products S.A.
Industry
Eligibility
19 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 31, 2019 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

United States Pre-Market Tobacco Application Pharmacokinetics

NCT03719391
View directory record Official record
Conditions
Nicotine Dependence, Nicotine Dependence, Cigarettes, Tobacco Use, Tobacco Smoking
Interventions
Virginia Tobacco flavored JUUL 5% ENDS, Cool Mint flavored JUUL 5% ENDS, Mango flavored JUUL 5% ENDS, Creme Brulee flavored JUUL 5% ENDS, VUSE Solo e-cigarette, Nicorette White Ice Mint 4mg nicotine polacrilex gum, Usual Brand combustible cigarette
Other
Lead sponsor
Juul Labs, Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 13, 2021 · Synced Sep 26, 2026, 3:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Perceptions of Vaping Products

NCT06868368
View directory record Official record
Conditions
Abuse Tobacco, Exposure
Interventions
Biospecimen Collection, Survey Administration, Vaping Topography, Participant's Own Preferred E-cigarette, Nicotine E-cigarette, 6-methyl-nicotine (metatine) e-cigarette
Other · Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 34 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 7, 2026 · Synced Sep 26, 2026, 3:14 AM EDT
Recruiting Phase 4 Interventional

The Avenues Study: Dual Use Cessation

NCT06474299
View directory record Official record
Conditions
Smoking Cessation, Electronic Cigarette Use
Interventions
Varenicline, Nicotine patch, Dual Focused Cessation Counseling, Smoking Focused Cessation Counseling, Counseling Intensity: 1 Session, Counseling Intensity: 4 Sessions
Drug · Behavioral · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
21 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 26, 2026, 3:14 AM EDT