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Showing 1–24 of 50 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Varenicline Pill Clear all
Completed Phase 1Phase 2 Interventional Results available

STARS (Smoking Treatment And Remote Sampling) Study

NCT04525755
View directory record Official record
Conditions
Smoking, Smoking Cessation, Tobacco Smoking, Cigarette Smoking
Interventions
Varenicline 0.5 MG, Nicotine Replacement Therapy (NRT)
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
652 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Varenicline on Brain Activity During Nicotine Abstinence

NCT00602927
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Varenicline, Placebo
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 9, 2011 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Cessation Screening Project

NCT04188873
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Preparation Varenicline and Standard Duration Varenicline, Preparation Varenicline and Extended Duration Varenicline, Standard Duration Varenicline, Extended Duration Varenicline, Preparation Combination NRT and Standard Duration Combination NRT, Preparation Combination NRT and Extended Duration Combination NRT, Standard Duration Combination NRT, Extended Duration Combination NRT, Intensive Counseling, Minimal Counseling
Drug · Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
538 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 21, 2026, 12:02 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

A Smoking Intervention Study Using Scheduled Gradual Reduction With Varenicline to Help With Cessation

NCT01772641
View directory record Official record
Conditions
Nicotine Addiction
Interventions
Scheduled Gradual Reduction + Varenicline, Scheduled Gradual Reduction + Placebo Drug, Basic Advice + Varenicline, Basic Advice + Placebo Drug
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 15, 2016 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 4 Interventional Results available

Health Systems Reach Interventions Project

NCT04199117
View directory record Official record
Conditions
Smoking, Cigarette, Smoking Cessation
Interventions
Varenicline, Combination nicotine patch and nicotine mini-lozenge treatment, Monetary incentives for initiating treatment, Automated tailored outreach, Care management, Wisconsin Tobacco Quit Line referral, Primary care provider referral, Untailored outreach, Multiple smoking cessation coaching calls
Drug · Behavioral · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Sep 21, 2026, 12:02 AM EDT
Withdrawn Phase 4 Interventional

Effects of Varenicline in Heavy Drinking Smokers

NCT02488889
View directory record Official record
Conditions
Cigarette Smoking, Alcohol Consumption
Interventions
Varenicline, Placebo pill (for varenicline), Alcohol, placebo beverage (for alcohol)
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 55 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 31, 2018 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Varenicline-Aided Cigarette Reduction in Smokers Not Ready to Quit

NCT01308736
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Varenicline, Placebo pill
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 64 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Jul 16, 2017 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Not applicable Interventional Results available

Varenicline and Motivational Advice for Smokers With Substance Use Disorders

NCT00756275
View directory record Official record
Conditions
Smoking Cessation, Nicotine Dependence
Interventions
Nicotine Replacement Treatment (NRT), varenicline, Behavioral counseling for smoking cessation
Drug · Behavioral
Lead sponsor
Brown University
Other
Eligibility
18 Years to 75 Years
Enrollment
158 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 26, 2018 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Varenicline Treatment for Active Alcoholic Smokers

NCT01347112
View directory record Official record
Conditions
Smoking, Tobacco Dependence, Alcohol Dependence
Interventions
Varenicline, placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
2
States / cities
Rochester, Minnesota • La Crosse, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 4, 2018 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Results available

Varenicline Treatment of Alcohol Dependence in Smokers

NCT01553136
View directory record Official record
Conditions
Alcoholism, Alcohol Abuse, Smoking, Alcohol Drinking
Interventions
Varenicline
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
131 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
2
States / cities
New Haven, Connecticut • New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 5, 2020 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Varenicline and Nicotine Interactions in Humans (VA)

NCT00606892
View directory record Official record
Conditions
Smoking Cessation
Interventions
Varenicline, Placebo, IV Nic
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 24, 2014 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 3 Interventional Results available

Pharmacogenetics of Nicotine Addiction Treatment

NCT01314001
View directory record Official record
Conditions
Nicotine Addiction
Interventions
Varenicline, Placebo, Transdermal Nicotine
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years
Enrollment
1,246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
3
States / cities
Buffalo, New York • Philadelphia, Pennsylvania • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 2, 2016 · Synced Sep 21, 2026, 12:02 AM 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 21, 2026, 12:02 AM EDT
Completed Phase 4 Interventional Results available

A Comparative Effectiveness & Long Term Health Study in Wisconsin Smokers

NCT01553084
View directory record Official record
Conditions
Smoking Cessation, Smoking, Nicotine Dependence
Interventions
Varenicline, Nicotine lozenge, Nicotine Patch
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 99 Years
Enrollment
1,086 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 1, 2020 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Results available

Effects of Varenicline on Smoking Reminders

NCT01524627
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Varenicline, Placebo
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 60 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 16, 2017 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Results available

Varenicline for Gait and Balance Impairment in Parkinson Disease

NCT01341080
View directory record Official record
Conditions
Parkinson Disease
Interventions
Varenicline, Sugar pill
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
40 Years to 90 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2018
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 29, 2022 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Genetically Informed Smoking Cessation Trial

NCT02351167
View directory record Official record
Conditions
Smoking Cessation
Interventions
Combination NRT (Nicotine patch, Nicotine lozenge), Varenicline, Placebo, Intensive smoking counseling
Drug · Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
21 Years and older
Enrollment
822 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 21, 2020 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Varenicline In-Patient Study

NCT01413516
View directory record Official record
Conditions
Smoking Cessation
Interventions
Smoking cessation counseling, Placebo, Varenicline
Behavioral · Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 13, 2023 · Synced Sep 21, 2026, 12:02 AM EDT
Terminated No phase listed Observational

Tobacco Dependence in Breast Cancer Patients Trial of Varenicline (Chantix)

NCT01532232
View directory record Official record
Conditions
Breast Cancer, Tobacco Dependence
Interventions
placebo, varenicline
Drug
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 22, 2015 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Results available

Varenicline vs Placebo for the Treatment of Methamphetamine Dependence

NCT01011829
View directory record Official record
Conditions
Methamphetamine Dependence, Substance Abuse, Methamphetamine Abuse
Interventions
Varenicline, Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 13, 2013 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 1 Interventional Results available

An Assessment of the Safety of Varenicline in Methamphetamine-dependent Volunteers

NCT00713479
View directory record Official record
Conditions
Methamphetamine Addiction, Crystal Meth Addiction, Amphetamine Addiction
Interventions
Varenicline, then placebo, Placebo, then varenicline
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 55 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 12, 2018 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Results available

UH3 Varenicline for Cannabis Use Disorder

NCT03980561
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Varenicline, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
174 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
2
States / cities
Charleston, South Carolina • Pickens, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 17, 2024 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 2 Interventional Results available

Varenicline for Methamphetamine Dependence

NCT01365819
View directory record Official record
Conditions
Methamphetamine Dependence, Substance Abuse, Methamphetamine Abuse
Interventions
Varenicline, Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 17, 2018 · Synced Sep 21, 2026, 12:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effects of Chantix on Relapse Prevention for Smoking Cessation

NCT00948649
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Placebo, Varenicline
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 16, 2010 · Synced Sep 21, 2026, 12:02 AM EDT