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Showing 1–24 of 87 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Former Smoker Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Study of Chokeberry to Reduce Cardiovascular Disease Risk in Former Smokers

NCT01541826
View directory record Official record
Conditions
Cardiovascular Disease, Oxidative Stress
Interventions
Chokeberry Extract, Placebo capsule, Chokeberry extract capsule, acute
Dietary Supplement
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 65 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 10, 2017 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Improving the Reach & Effectiveness of Smoking Cessation Services Targeted to Veterans Living With HIV

NCT04505371
View directory record Official record
Conditions
HIV Infections, Smoking, Smoking Cessation
Interventions
Wellness Intervention for Smokers with HIV
Behavioral
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years and older
Enrollment
235 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 9, 2026, 3:10 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Centralized Lung Cancer EARly Detection Among Smokers (CLEAR Study)

NCT04200534
View directory record Official record
Conditions
Smoking, Lung Cancer
Interventions
Best Practice, Nicotine Patch, Quality-of-Life Assessment, Questionnaire Administration, Tobacco Cessation Counseling
Other · Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
55 Years to 77 Years
Enrollment
358 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
3
States / cities
Galveston, Texas • Houston, Texas • Tyler, Texas
Source: ClinicalTrials.gov public record
Updated Aug 21, 2025 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 1 Interventional

Smoking Cessation and Sexual Health in Men

NCT00833404
View directory record Official record
Conditions
Smoking Cessation
Interventions
Nicotine transdermal patch
Drug
Lead sponsor
University of Texas at Austin
Other
Eligibility
23 Years to 60 Years · Male only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Sep 11, 2011 · Synced Sep 9, 2026, 3:10 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Electronic Quitline Referral With Enhanced Academic Detailing for the Promotion of Smoking Cessation

NCT04969978
View directory record Official record
Conditions
Tobacco-Related Carcinoma, Smoking &Amp; Tobacco Cessation
Interventions
Enhanced Academic Detailing, Informational Intervention
Behavioral · Other
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
9,133 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 9, 2026, 3:10 AM EDT
Terminated Phase 2 Interventional Results available

Sorafenib in Treating Non-Smokers or Former Light Smokers With Relapsed or Refractory Stage IIIB or Stage IV Non-Small Cell Lung Cancer

NCT00754923
View directory record Official record
Conditions
Lung Cancer
Interventions
sorafenib
Drug
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 5, 2019 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Smartphone Application Smoking Cessation Study

NCT04623736
View directory record Official record
Conditions
Tobacco Use
Interventions
quitSTART
Behavioral
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 9, 2021 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study of the Diffusion of a Smoking Cessation Application Through an Online Network

NCT01746472
View directory record Official record
Conditions
Use and Dissemination of Smoking Cessation Intervention, Cessation of Smoking
Interventions
Facebook app - condition t, Facebook app - condition z, Facebook app - condition B-active, Facebook app - condition B-passive
Behavioral
Lead sponsor
Truth Initiative
Other
Eligibility
18 Years and older
Enrollment
11,413 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Mar 14, 2016 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 3 Interventional

Efficacy and Safety of Rimonabant as an Aid to Maintenance of Smoking Cessation

NCT00459173
View directory record Official record
Conditions
Maintenance of Smoking Cessation
Interventions
rimonabant (SR141716)
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Enrollment
4,850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 6, 2009 · Synced Sep 9, 2026, 3:10 AM EDT
Active, not recruiting Phase 2 Interventional Accepts healthy volunteers

Phase II Trial to Modulate Intermediate Endpoint Biomarkers in Former and Current Smokers

NCT03598309
View directory record Official record
Conditions
Lung Diseases, Lung Cancer, Protection Against
Interventions
Curcumin C3 complex®, Lovaza®, Placebo
Drug · Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
55 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 2 Interventional

Celecoxib in Preventing Lung Cancer in Former Heavy Smokers

NCT00055978
View directory record Official record
Conditions
Lung Cancer
Interventions
celecoxib, placebo
Drug · Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
45 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 19, 2011 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Offering Proactive Tobacco Treatment

NCT01123967
View directory record Official record
Conditions
Tobacco Use Cessation
Interventions
proactive outreach (PRO), telephone counseling (TC), Nicotine replacement therapy (NRT), Usual care (UC)
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 64 Years
Enrollment
2,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Sep 9, 2026, 3:10 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Natural History of Gene Expression in the Lung Cells of Non-Smokers, Smokers and Ex-Smokers in Health and Disease

NCT00974064
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD), Smoking, Smoking Cessation, Chronic Bronchitis, Emphysema
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
171 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 26, 2020 · Synced Sep 9, 2026, 3:10 AM EDT
Active, not recruiting Phase 3 Interventional

Optimizing Tobacco Use Treatment for PLWHA

NCT04176172
View directory record Official record
Conditions
HIV/AIDS, Nicotine Dependence
Interventions
Varenicline, Nicotine patch, Standard treatment, Standard treatment + Managed Problem Solving (MAPS) adherence intervention
Drug · Behavioral
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
18 Years and older
Enrollment
340 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
2
States / cities
Chicago, Illinois • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 2 Interventional Results available

18F-FSPG PET/CT in Diagnosing Early Lung Cancer in Patients With Lung Nodules

NCT03824535
View directory record Official record
Conditions
Cigarette Smoker, Current Smoker, Former Smoker, Multiple Pulmonary Nodules, Pulmonary Nodule
Interventions
Computed Tomography, Fludeoxyglucose F-18, Fluorine F 18 L-glutamate Derivative BAY94-9392, Positron Emission Tomography (PET/CT)
Diagnostic Test · Drug
Lead sponsor
Andrei Iagaru
Other
Eligibility
45 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Sep 9, 2026, 3:10 AM EDT
Completed No phase listed Observational

Evaluation of Cardiovascular Effects of Smoking Cessation in HIV Patients

NCT00918073
View directory record Official record
Conditions
HIV Infections, Smokers
Interventions
Not listed
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
16 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 6, 2013 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional Results available

Clinical Trial of Smoking Cessation Mobile Phone Program

NCT02656745
View directory record Official record
Conditions
Nicotine Addiction, Drug Addiction, Drug Dependence, Substance Use Disorder, Tobacco Dependence
Interventions
Mobile Smoking Cessation Solution
Device
Lead sponsor
Click Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
416 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 13, 2018 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 2 Interventional Results available

Clinical Trial of Lung Cancer Chemoprevention With Sulforaphane in Former Smokers

NCT03232138
View directory record Official record
Conditions
Lung Cancer
Interventions
Sulforaphane, Placebo
Dietary Supplement · Drug
Lead sponsor
Jian-Min Yuan, MD
Other
Eligibility
55 Years to 75 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 16, 2024 · Synced Sep 9, 2026, 3:10 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Smoking Cessation Intervention During Low Dose CT (LDCT) Screening for Lung Cancer

NCT03059940
View directory record Official record
Conditions
Smoking Cessation
Interventions
Questionnaires, Low Dose Computed Tomography Scan, Shared Decision Making + Video, Cessation Counseling, Quitline, Pharmacotherapy Discussion, Nicotine Patch, Anti-Smoking Drug, Tobacco Treatment Program, Carbon Monoxide (CO) Level Test
Behavioral · Procedure · Other + 1 more
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
50 Years and older
Enrollment
630 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 9, 2026, 3:10 AM EDT
Recruiting Not applicable Interventional

Preliminary Effectiveness of Enhanced Text Message + Incentives

NCT07420621
View directory record Official record
Conditions
Smoking Cessation, Pregnancy
Interventions
Text Messages, Incentives
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional

Effectiveness of Smoking-cessation Interventions for Urban Hospital Patients

NCT01363245
View directory record Official record
Conditions
Smoking Cessation
Interventions
Telephone Counseling, Fax-to-quit
Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
1,618 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 1, 2015 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 2 Interventional Results available

Inositol in Preventing Lung Cancer in Current or Former Smokers With Bronchial Dysplasia

NCT00783705
View directory record Official record
Conditions
Non-small Cell Lung Cancer, Squamous Lung Dysplasia
Interventions
placebo, inositol
Other · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
45 Years to 79 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
3
States / cities
Scottsdale, Arizona • Rochester, Minnesota • Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Dec 4, 2017 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Phase I/II Study of Chemoprevention With EGFR and COX-2 Inhibitor

NCT00314262
View directory record Official record
Conditions
Precancerous Conditions
Interventions
Erlotinib & Celecoxib
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 23, 2014 · Synced Sep 9, 2026, 3:10 AM EDT
Completed Not applicable Interventional

Indoor Air Quality and Respiratory Symptoms in Former Smokers

NCT02956213
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
HEPA portable air filter, Sham Control/Active Comparator
Other
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
40 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 12, 2019 · Synced Sep 9, 2026, 3:10 AM EDT