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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Quit electronic cigarettes Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

STEPS: Substance Use Trial of E-cigarettes or Pharmacotherapy for Smoking

NCT06922617
View directory record Official record
Conditions
Tobacco Use, Substance Use Disorders
Interventions
Switching to E-Cigarette, Quitting using Medication, Counseling
Behavioral · Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
4
States / cities
Charleston, South Carolina • Conway, South Carolina • Greenville, South Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Phase 4 Interventional Results available

The END Perioperative Smoking Pilot Study

NCT02482233
View directory record Official record
Conditions
Smoking, Nicotine Addiction, Surgery
Interventions
ENDD (NJOY), NRT (NicoDerm CQ), telephone counseling, brief advice, brochure
Behavioral · Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 8, 2022 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Phase 2 Interventional Results available

Varenicline for Treatment of E-cigarette Dependence

NCT05541497
View directory record Official record
Conditions
Smoking Cessation
Interventions
Varenicline Tartrate, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
2
States / cities
New Haven, Connecticut • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 1, 2024 · Synced Sep 24, 2026, 9:37 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Alternate Nicotine Delivery Systems and Airway Epithelial Biology

NCT01974063
View directory record Official record
Conditions
Smoking, Smoking Cessation
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 2, 2018 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Quit Nicotine: E-Cig Cessation Intervention

NCT04898075
View directory record Official record
Conditions
E-Cig Use
Interventions
Remote Contingency Management (CM) for nicotine abstinence, Control
Behavioral · Other
Lead sponsor
Yale University
Other
Eligibility
13 Years to 20 Years
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 9, 2025 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Neuroimaging Approach to Advance Mechanistic Understanding of Tobacco Use Escalation Risk Among Young Adult African American Vapers

NCT05829863
View directory record Official record
Conditions
Message Exposure
Interventions
educational message exposure
Behavioral
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 29 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 22, 2025 · Synced Sep 24, 2026, 9:37 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Switch or Quit R01

NCT06373679
View directory record Official record
Conditions
Cigarette Smoking, Smoking Behaviors
Interventions
Switching to E-Cigarette, Switching using Medication
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Not yet recruiting Not applicable Interventional

AI-Enhanced App-based Intervention for Adolescent E-cigarette Cessation

NCT06965296
View directory record Official record
Conditions
Nicotine Dependence, Cigarettes
Interventions
AI-enhanced smartphone app, AI-enhanced smartphone app, but with delayed access
Behavioral
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
14 Years to 20 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Goal2QuitVaping for Nicotine Vaping Cessation Among Adolescents

NCT04951193
View directory record Official record
Conditions
Depressive Symptoms, Depression, Adolescent Behavior
Interventions
Behavioral Activation Therapy app, Treatment as Usual
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
16 Years to 20 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Aug 20, 2024 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tobacco Treatment Outreach to Reduce Disparities for Primary Care Populations

NCT01156610
View directory record Official record
Conditions
Smoking, Smoking Cessation
Interventions
Tobacco Treatment
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
706 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 5, 2014 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparing Nicotine Delivery, Subjective Effects, and Sensory Experiences of Tobacco Users Using Oral Nicotine Products and Electronic Cigarettes [ZYN Study]

NCT05030194
View directory record Official record
Conditions
Tobacco Use, Tobacco Smoking, Cigarette Smoking, Smokeless Tobacco Cessation
Interventions
Electronic Cigarette, Oral Nicotine Pouch
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
21 Years to 55 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 25, 2023 · Synced Sep 24, 2026, 9:37 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

To Vape or Not to Vape

NCT05240027
View directory record Official record
Conditions
Vaping
Interventions
Vape use survey
Behavioral
Lead sponsor
Methodist Health System
Other
Eligibility
12 Years and older
Enrollment
363 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 22, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Active, not recruiting Not applicable Interventional

Implementing an Adolescent and Young Adult (AYA) mHealth Vaping Cessation Program Into Oncology Clinics

NCT05967585
View directory record Official record
Conditions
Vaping, Vaping Cessation
Interventions
Behavioral: Quitting Program (TIQ)
Device
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
13 Years to 24 Years
Enrollment
539 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

An Evaluation of the Tobacco Prevention Toolkit Healthy Futures: Alternative-to-Suspension Vaping Intervention

NCT06483412
View directory record Official record
Conditions
Tobacco Use Cessation, Addiction
Interventions
Healthy Futures: Alternative-to-Suspension Curriculum
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
14 Years to 18 Years
Enrollment
2,540 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced Sep 24, 2026, 9:37 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

E-cigarette Cessation in Adults Who Co-use Cannabis

NCT06688539
View directory record Official record
Conditions
Nicotine Dependence, Tobacco Use Disorder
Interventions
Varenicline Pill, Contingency management, Counseling
Drug · Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 40 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
3
States / cities
Charleston, South Carolina • Lancaster, South Carolina • Pickens, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Phase 2 Interventional Results available

CAN-DOSE Study: Cessation With Augmented Nicotine for Dual Use Of Smoking and E-cigarettes

NCT06087328
View directory record Official record
Conditions
Smoking Cessation, Electronic Cigarette Use, Cigarette Smoking
Interventions
Regular Nicotine patch and lozenge dose, Augmented Nicotine patch and lozenge dose
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Randomized Clinical Trial to Reduce Harm From Tobacco

NCT02328794
View directory record Official record
Conditions
Smoking Cessation
Interventions
E-cigarette free access, E-cigarette/NRT/Zyban/Chantix Choice, Outcome Incentive arm, Loss framing incentive arm, Control
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 99 Years
Enrollment
6,006 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 1, 2017 · Synced Sep 24, 2026, 9:37 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Switching to E-cigarettes in Smokers Not Interested in Quitting

NCT05703672
View directory record Official record
Conditions
Smoking Reduction
Interventions
Varenicline Tartrate, Placebo, Electronic cigarette
Drug · Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
21 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
2
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 28, 2025 · Synced Sep 24, 2026, 9:37 PM EDT
Recruiting Phase 2 Interventional

The CONQUER Trial - Cessation Of Nicotine, QUitting With E-cigarette Reduction

NCT07322432
View directory record Official record
Conditions
Addiction Nicotine
Interventions
VapeAway filter system
Device
Lead sponsor
VapeAway
Industry
Eligibility
21 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

UW Withdraw From Tobacco Study

NCT04969198
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Combination nicotine replacement therapy (Nicotine patch + nicotine mini-lozenge)
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
21 Years and older
Enrollment
232 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Sep 24, 2026, 9:37 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Kick-Nic! Youth Quit Vaping App

NCT06662305
View directory record Official record
Conditions
Nicotine Vaping
Interventions
Kick-Nic! mobile phone application, NCI Quit Vaping website
Behavioral
Lead sponsor
Yale University
Other
Eligibility
12 Years to 19 Years
Enrollment
306 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional

A Usability Study of a Smoking Cessation Decision Aid in People With a Recent First Episode of Psychosis

NCT01399112
View directory record Official record
Conditions
Smoking, Psychosis
Interventions
Web-based computer program
Behavioral
Lead sponsor
Northwell Health
Other
Eligibility
15 Years to 30 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Glen Oaks, New York
Source: ClinicalTrials.gov public record
Updated Jan 2, 2013 · Synced Sep 24, 2026, 9:37 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Studying the Impacts of Higher Taxes and Bans on Electronic Cigarettes to Improve Public Health

NCT07581041
View directory record Official record
Conditions
Tobacco-Related Carcinoma
Interventions
Discrete Choice Study, Survey Administration
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
15 Years and older
Enrollment
3,400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 24, 2026, 9:37 PM EDT
Completed Not applicable Interventional

Quit IT: Preliminary Testing of a Web-based, 3D Coping Skills Game to Increase Quitting Self-Efficacy for Maintaining Smoking Abstinence Following Hospitalization

NCT02099097
View directory record Official record
Conditions
Tobacco Use Cessation
Interventions
web-based video game (Quit IT), Questionnaires, Salvia sample
Other · Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 29, 2020 · Synced Sep 24, 2026, 9:37 PM EDT