| Not Yet Recruiting | A Mindfulness-based Intervention for Sexual Assault Survivors NCT07515586 | Georgia State University | N/A |
| Not Yet Recruiting | Optimizing Treatment of Co-occurring Smoking and Unhealthy Alcohol Use Among PWH in Nairobi, Kenya NCT06790342 | University of Chicago | Phase 3 |
| Not Yet Recruiting | Telegram Messenger Support for Smoking Cessation After Heart Attack NCT07230249 | ITMO University | N/A |
| Not Yet Recruiting | Feasibility and Acceptability Trial to Reduce Tobacco and Cannabis Use During Pregnancy and Postpartum NCT07489443 | University of Pittsburgh | N/A |
| Enrolling By Invitation | Robot-Assisted Immersive Escape Room Game for Tobacco Harm Prevention Among Elementary School Students NCT07501572 | National Taiwan Normal University | N/A |
| Recruiting | Little Cigar Oxidants NCT06310187 | Milton S. Hershey Medical Center | N/A |
| Not Yet Recruiting | A Study to Assess Nicotine Uptake From Electronic Nicotine Delivery Systems NCT07323563 | RAI Services Company | N/A |
| Recruiting | Cigar Legislation and Regulation in Tobacco for the Young (Project CLARITY) NCT07162935 | University of Oklahoma | N/A |
| Not Yet Recruiting | Abuse Liability for Eight Electronic Nicotine Products NCT07323511 | RAI Services Company | N/A |
| Recruiting | Catalyzing Cigarette Smoking Cessation Through Harm Reduction Sampling Among People Unmotivated to Quit NCT07199517 | Abramson Cancer Center at Penn Medicine | N/A |
| Not Yet Recruiting | Abuse Liability for Four Heated Tobacco Product (HTP) Consumables and Two HTP Devices NCT07267195 | RAI Services Company | N/A |
| Recruiting | Abuse Liability for Five Modern Oral Nicotine Products NCT07132814 | RAI Services Company | N/A |
| Completed | Comparison of Demand and Substitution for Nicotine Pouches as a Function of Nicotine Dosage NCT07213947 | William Middleton | N/A |
| Recruiting | Extended Intervention for Tobacco Use (EXIT) for People Experiencing Homelessness NCT07148232 | University of California, San Francisco | Phase 4 |
| Recruiting | Neural Correlates and Behavioral Impact of Withdrawal-induced Hyperalgesia Among People Who Smoke With and Wit NCT06983678 | Duke University | N/A |
| Recruiting | STEPS: Substance Use Trial of E-cigarettes or Pharmacotherapy for Smoking NCT06922617 | Medical University of South Carolina | N/A |
| Not Yet Recruiting | A Community Health Worker Intervention to Improve Lung Cancer Screening Uptake in Community Health Centers NCT07168629 | Baystate Medical Center | N/A |
| Completed | Responses of Adults Smoking Nondaily and Daily in the Experimental Tobacco Marketplace NCT06988371 | Bethany Shorey Fennell | N/A |
| Recruiting | Developing a Scalable Tobacco Cessation Program for Cancer Survivors and Caregivers NCT06851936 | University of Florida | N/A |
| Recruiting | CONNECT Cancer Survivors With Tobacco Treatment NCT07020273 | Washington University School of Medicine | N/A |
| Recruiting | Understanding the Clinical Pharmacology of Marijuana-Tobacco Co-administration NCT05999383 | University of California, San Francisco | Phase 2 |
| Enrolling By Invitation | Can Cognitive Behavioural Therapy Help Incarcerated Men Quit Smoking? Efficacy and Predictors of Treatment Out NCT06873009 | Centre Hospitalier St Anne | N/A |
| Completed | Oral Nicotine Pouch Marketing Features Influence on Perceptions NCT06605924 | Johns Hopkins Bloomberg School of Public Health | N/A |
| Recruiting | Neural Mechanisms Connecting Deficient Sleep and Smoking Relapse NCT06609369 | Yale University | Phase 2 |
| Recruiting | Opioids, Low Nicotine Cigarettes, and Chronic Pain NCT06747871 | Duke University | N/A |
| Recruiting | Nonendoscopic Screening for Barrett's Esophagus in Veterans Without Chronic Reflux NCT06746623 | Louis Stokes VA Medical Center | N/A |
| Recruiting | Symptoms and Functions in Patients With COPD and Chronic Bronchitis Switching From CIG to THS NCT07108166 | Philip Morris Products S.A. | N/A |
| Recruiting | Effect of Cannabis on E-Cigarette Use Behavior NCT06609109 | Johns Hopkins University | Phase 1 |
| Recruiting | Reach Through Equitable Implementation in Utah NCT06881069 | University of Utah | N/A |
| Completed | Modern Nicotine Oral Product Abuse Liability NCT06777784 | RAI Services Company | N/A |
| Recruiting | Effect of Cannabis on Cigarette Use Behavior NCT06609083 | Johns Hopkins University | Phase 1 |
| Active Not Recruiting | E-cigarette Switching Older Adults NCT06534905 | University of Maryland, Baltimore | N/A |
| Recruiting | A Study Evaluating the Use of an Indoor Air Quality Monitor to Promote a Smoke-free Home NCT06693700 | Memorial Sloan Kettering Cancer Center | N/A |
| Enrolling By Invitation | Salvation Army Tobacco Quit Line Referral Implementation Trial NCT06689774 | University of Wisconsin, Madison | N/A |
| Recruiting | Effects of Relighting on Smoke Toxicant Deliveries and Subjective Smoking Measures NCT06295757 | Masonic Cancer Center, University of Minnesota | N/A |
| Recruiting | Noncombustible Nicotine Delivery Systems as Potential Harm Reduction Tools for Persistent Cigarette Smokers NCT06372899 | Abramson Cancer Center at Penn Medicine | N/A |
| Terminated | Remote Trial - Tobacco Product Standard (VLNC) NCT06442384 | Masonic Cancer Center, University of Minnesota | N/A |
| Recruiting | The Role of Flavor in the Substitutability of E-cigarettes for Combustible Cigarettes Among Persistent Smokers NCT06264154 | Abramson Cancer Center at Penn Medicine | N/A |
| Completed | CSD231005 Nicotine Pouch Biomarkers of Exposure NCT06303115 | RAI Services Company | N/A |
| Enrolling By Invitation | Modeling Tobacco Regulatory Impacts in Appalachia Using the Experimental Tobacco Marketplace NCT06234722 | Mikhail N Koffarnus | N/A |
| Completed | Little Cigar and Cigarillo Warnings to Reduce Tobacco-Related Cancers and Disease - Eye Tracking NCT06546618 | UNC Lineberger Comprehensive Cancer Center | N/A |
| Recruiting | The Efficacy of Conventional Screening Versus mHealth Screening in Early Detection of Oral Potentially Maligna NCT06535867 | Memorial Sloan Kettering Cancer Center | — |
| Recruiting | Clinical Management of Cardiovascular Risk Factors in Adult Patients: A Before-and-After Interventional Study NCT07447362 | Universidad Católica San Antonio de Murcia | N/A |
| Completed | Chatbot Counselling for Smoking Cessation in Youths NCT06470776 | The University of Hong Kong | N/A |
| Recruiting | Impact of Semaglutide on Tobacco Use and Related Health Behaviors NCT06986993 | University of Oklahoma | Phase 4 |
| Recruiting | Developing a Positive Approach to Substance Use Prevention in North American Indian Adolescents NCT05380765 | University of Rhode Island | N/A |
| Completed | Room Air Levels of Harmful and Potentially Harmful Constituents After Heated Tobacco Product Use and Cigarette NCT06476405 | Altria Client Services LLC | — |
| Completed | Tobacco Cessation at FDNY NCT05997225 | Albert Einstein College of Medicine | Phase 4 |
| Recruiting | Integrating CHWs Into Prenatal Care for Maternal Smoking Cessation NCT06438549 | Loma Linda University | N/A |
| Completed | Attitudes and Smoking Perceptions in the Real Environment NCT06617520 | University of Oklahoma | N/A |
| Recruiting | Trial of a Harm Reduction Strategy for People With HIV Who Smoke Cigarettes NCT05642715 | Montefiore Medical Center | N/A |
| Completed | Feasibility Study - Filter Ventilation NCT04514471 | Masonic Cancer Center, University of Minnesota | N/A |
| Completed | Pharmacokinetic and Subjective Effects of Heated Tobacco Products NCT06356610 | Altria Client Services LLC | N/A |
| Recruiting | Journey of Transformation Curriculum for Native American Youth NCT05731713 | University of Washington | N/A |
| Completed | A Mobile App Based Cognitive Dissonance Intervention for Smoking Cessation NCT05797155 | Oregon Research Behavioral Intervention Strategies, Inc. | N/A |
| Enrolling By Invitation | A Patient-Oriented Research Mentoring Program in Tobacco Dependence and Implementation Science Research NCT05852860 | Abramson Cancer Center at Penn Medicine | N/A |
| Completed | Pharmacokinetics and Comparative Bioavailability of Nicotine From Two Variants of NP2, NP2-4mg and NP2-6mg, Co NCT06171490 | Philip Morris Products S.A. | N/A |
| Completed | Changes in Biomarker of Exposure in Adults Who Smoke Cigarettes Switching From Cigarettes to Heated Tobacco Pr NCT06179290 | Altria Client Services LLC | N/A |
| Unknown | FRESHAIR4Life: Building the Case for Action NCT06074939 | Leiden University Medical Center | — |
| Recruiting | Motivational Interviewing and Mindfulness-Oriented Recovery Enhancement NCT06033599 | Rutgers, The State University of New Jersey | Phase 3 |
| Enrolling By Invitation | Enhancing Equity in Smoke-free Housing NCT06042361 | Harvard School of Public Health (HSPH) | N/A |
| Completed | Randomized Controlled Trial to Evaluate the Impact of ZYN Nicotine Pouch Products on Cigarette Usage and BoExp NCT06568900 | Swedish Match AB | N/A |
| Completed | Health and Wellness After Preterm Birth NCT05756634 | Children's Hospital of Philadelphia | N/A |
| Completed | Predictors and Consequences of Combustible Cigarette Smokers' Switch to Standardized Research E-Cigarettes NCT03277495 | University of Illinois at Chicago | N/A |
| Unknown | Characterization of the Pattern of Consumption and Withdrawal Syndrome From Dual Cannabis and Tobacco Use NCT05512091 | Cristina Martínez Martínez | — |
| Completed | Little Cigar and Cigarillo Warnings Among US Adults Who Use LCCs NCT05849051 | UNC Lineberger Comprehensive Cancer Center | N/A |
| Completed | Integrating Tobacco Use Cessation Into HIV Care and Treatment in Kisumu County, Kenya NCT05351606 | University of California, San Francisco | Phase 4 |
| Active Not Recruiting | A Pragmatic Trial of Chronic Disease Approaches to Ameliorate Tobacco Related Cardiovascular Disease Health Di NCT05671380 | University of Minnesota | N/A |
| Completed | Ketamine and Motivational Enhancement Therapy for the Treatment of Tobacco Use Disorder NCT05796791 | Medical University of South Carolina | EARLY_Phase 1 |
| Recruiting | Linking Brain Network Dynamics to Imminent Smoking Lapse Risk and Behavior NCT05572671 | Penn State University | N/A |
| Recruiting | Cardiovascular Effects of Very Low Nicotine Content Cigarettes NCT05707871 | Wake Forest University Health Sciences | EARLY_Phase 1 |
| Recruiting | Deep rTMS Modulating Insula Synaptic Density and Smoking Behavior in Schizophrenia NCT05724810 | Stony Brook University | N/A |
| Recruiting | Overcoming Nicotine Dependence to Enable Quitting NCT05513872 | Rush University Medical Center | Phase 1 / Phase 2 |
| Withdrawn | Effect of Switching From Cigarette Smoking to THS on Systemic Endothelial Function in Subjects With Establishe NCT05566678 | Philip Morris Products S.A. | N/A |
| Completed | A Brief Digital Screening Tool to Address Tobacco and E-cigarette Use in Pediatric Medical Care NCT05366790 | St. Justine's Hospital | N/A |
| Completed | Nicotine Pharmacokinetics and Subjective Effects of Oral Nicotine Products Relative to Smokeless Tobacco in Ad NCT06691386 | Altria Client Services LLC | N/A |
| Terminated | Effect of Switching From Cigarette Smoking to THS on Disease Progression in Mild to Moderate COPD Subjects Wit NCT05569005 | Philip Morris Products S.A. | N/A |
| Completed | QuitGuide for American Indians: Aims 2 & 3 NCT05447156 | Masonic Cancer Center, University of Minnesota | N/A |
| Completed | The Abuse Liability of a Novel Heated Tobacco Product (IQOS) and Its Feasibility as a Menthol Cigarette Substi NCT05499377 | Virginia Commonwealth University | N/A |
| Completed | Reduced Exposure to HPHC in Smokers Switching From Cigarettes to Different Versions of THS NCT05599451 | Philip Morris Products S.A. | N/A |
| Unknown | Choose2Quit: Improving Equity in Smoking Cessation for Low Income Adults NCT05612152 | Oregon Health and Science University | N/A |
| Recruiting | Oral Cannabidiol for Tobacco Cessation NCT05445804 | Johns Hopkins University | Phase 1 |
| Completed | Testing Legally Feasible Options Studies 2/3 NCT05604508 | RAND | N/A |
| Enrolling By Invitation | Persistent Poverty Counties Pregnant Women With Medicaid NCT05415371 | University of Oklahoma | N/A |
| Terminated | Journey of Transformation Curriculum for Native American Adolescents NCT05274217 | University of Washington | N/A |
| Completed | Effects of an Oral Nicotine Product in Smokeless Tobacco Users NCT05280769 | Virginia Commonwealth University | N/A |
| Active Not Recruiting | Teachable Moment to Opt-out of Tobacco: Interactive Voice Response Quit Line for Veteran Active Smokers With L NCT04574518 | VA Office of Research and Development | N/A |
| Completed | Quit or Switch: E-cigarette Study NCT05525078 | Medical University of South Carolina | N/A |
| Completed | Cigarette and E-cigarette Nicotine Content in an Electronic Tobacco Marketplace (ETM) NCT05320887 | Wake Forest University Health Sciences | N/A |
| Completed | Tobacco, Alcohol, Prescription Drug, and Illicit Substance Use- Electronic Spanish Platform NCT05476588 | Baylor Research Institute | N/A |
| Completed | Improving Tobacco Treatment Rates for Cancer Patients Who Smoke NCT04738643 | Abramson Cancer Center at Penn Medicine | N/A |
| Completed | CSD200902: Assessment of Indoor Air Quality for a Heated Tobacco Product With Four Non-Combusted Cigarette Var NCT05363254 | RAI Services Company | N/A |
| Completed | Tobacco Cessation Treatment Preferences Among Veteran Smokers NCT05277207 | VA Office of Research and Development | Phase 4 |
| Completed | CSD201301: Study to Assess Elements of Abuse Liability for Four P13 Nicotine Pouches NCT05294497 | RAI Services Company | N/A |
| Completed | CSD210903: A Study to Determine Subject Puffing Patterns of a Heated Tobacco Product With Four Non-Combusted C NCT05307822 | RAI Services Company | N/A |
| Active Not Recruiting | Development of UP2UTobacco for High School Youth NCT05396911 | University of Virginia | N/A |
| Completed | Responses to Regulated E-Cigarette Advertisements NCT05207033 | University of Massachusetts, Worcester | N/A |
| Unknown | Examining Effects of Domain Specific Episodic Future Thinking on Cannabis Use NCT05324813 | Michael Sofis | N/A |
| Completed | Media Literacy for High School Tobacco Prevention NCT05120466 | University of Pittsburgh | N/A |
| Completed | CSD201201: Study to Assess Elements of Abuse Liability for Electronic Nicotine Delivery System P12 NCT05210699 | RAI Services Company | N/A |
| Completed | CSD201202: A Study to Assess Nicotine Uptake From Electronic Nicotine Delivery System P12 NCT05239884 | RAI Services Company | N/A |
| Completed | Pittsburgh and Rural Area High School Tobacco Prevention NCT05081843 | University of Pittsburgh | N/A |
| Completed | Sugars in Cigarettes NCT05308316 | Masonic Cancer Center, University of Minnesota | N/A |
| Completed | CSD201203: A Study to Determine Subject Puffing Patterns of a Non-cylindrical, Closed, Electronic Nicotine Del NCT05118139 | RAI Services Company | N/A |
| Terminated | Testing Feasibility of Care Coordination and Motivational Interviewing for Women With a Recent Preterm Birth NCT05120843 | Children's Hospital of Philadelphia | N/A |
| Completed | CSD201004: An Actual Use Study of P10 and P13 Nicotine Pouches Among U.S. Adult Smokers NCT05184920 | RAI Services Company | — |
| Completed | BAT3221032: A Study to Evaluate the Effects of Switching From Cigarette Smoking to Using One of Five Variants NCT05142436 | British American Tobacco (Investments) Limited | N/A |
| Completed | Identify the Usefulness of In-person and Virtual Quit Smoking Programs NCT05181072 | Morgan State University | N/A |
| Completed | CSD200907: A Study to Assess Elements of Abuse Liability for a Heated Tobacco Product With Four Non-Combusted NCT05114863 | RAI Services Company | N/A |
| Active Not Recruiting | Implementing Tobacco Use Treatment in HIV Clinics Vietnam NCT05162911 | New York University | N/A |
| Completed | Be A Quitter: Illinois Small Business EX Program Dissemination NCT07097194 | University of Illinois at Urbana-Champaign | N/A |
| Completed | Mixed Presentation on Social Media NCT05066126 | University of Pennsylvania | N/A |
| Completed | CSD201001: Study to Assess Elements of Abuse Liability for Three Nicotine Pouches NCT05129657 | RAI Services Company | N/A |
| Completed | CSD210904: Study to Assess Actual Use of a Heated Tobacco Product With Four Non-Combusted Cigarette Variants i NCT05102786 | RAI Services Company | — |
| Completed | Comparing Nicotine Delivery, Subjective Effects, and Sensory Experiences of Tobacco Users Using Oral Nicotine NCT05030194 | Roswell Park Cancer Institute | N/A |
| Completed | CSD201002: Study to Assess Nicotine Uptake From P10 Nicotine Pouches NCT05081154 | RAI Services Company | N/A |
| Completed | The Effect of Sweet Flavoring on the Rewarding and Reinforcing Value of Cigarillo Use Among Young Adults NCT05092919 | University of Pennsylvania | EARLY_Phase 1 |
| Completed | The Effects of IQOS Use on Cigarette Smoking Behaviors NCT05076708 | University of Pennsylvania | EARLY_Phase 1 |
| Unknown | Strategies to Connect Patients at Federally Qualified Health Clinics With Evidence Based Tobacco Cessation Tre NCT03900767 | University of Utah | N/A |
| Completed | Patient Navigation-based Tobacco Harm Reduction Program Among Cancer Patients NCT04972916 | Milton S. Hershey Medical Center | N/A |
| Completed | Project HEALS (Helping and Empowering pAtients for Living a Life Smoke-free NCT05362318 | H. Lee Moffitt Cancer Center and Research Institute | N/A |
| Withdrawn | NYCHA Mindfulness-based Smoking Cessation Intervention NCT04334187 | NYU Langone Health | N/A |
| Completed | Telehealth-Filter Ventilation ( COMET2P1 ) NCT04969783 | Masonic Cancer Center, University of Minnesota | N/A |
| Active Not Recruiting | The Effect of Tobacco Products on Wound Healing NCT04870970 | University of Minnesota | — |
| Completed | Improving Tobacco Treatment Rates for Outpatient Cancer Patients Who Smoke NCT04737031 | Abramson Cancer Center at Penn Medicine | N/A |
| Recruiting | RTMS Targets Neural Circuits for Smoking Cessation NCT04903028 | Medical University of South Carolina | N/A |
| Completed | Study to Evaluate Changes in Smokers Using on!® Nicotine Pouches NCT05664672 | Altria Client Services LLC | N/A |
| Completed | A Study to Characterize Nicotine Pharmacokinetics and Subjective Effects of Nicotine Pouches in Adult Cigarett NCT04846088 | British American Tobacco (Investments) Limited | N/A |
| Completed | Pilot Randomised Controlled Trial of ToQuit Intervention in India NCT04782453 | Sangath | N/A |
| Enrolling By Invitation | Tobacco-Concurrent Addictions in At-Risk Youth in Ottawa NCT04812613 | Ottawa Hospital Research Institute | — |
| Unknown | Lung Macrophage Populations and Functions in Chronic Obstructive Pulmonary Disease (COPD)-Susceptible Smokers NCT04722835 | University of California, San Francisco | — |
| Completed | CSD210202: A Study to Assess Nicotine Uptake From Electronic Nicotine Delivery Systems NCT04751461 | RAI Services Company | N/A |
| Completed | Digital Media for Cancer Control (to Prevent Vaping and Smoking Behavior) NCT04867668 | George Washington University | N/A |
| Completed | A Study to Assess the Pharmacokinetics of Oral Nicotine Pouches and Lozenges in Healthy Adults NCT04755348 | British American Tobacco (Investments) Limited | N/A |
| Unknown | Eliciting Perceived Norms About Substance Use NCT04833972 | Massachusetts General Hospital | N/A |
| Completed | CORE: CO Monitoring for Reach and Efficacy in Tobacco Treatment for Cancer Patients NCT04675515 | Dartmouth-Hitchcock Medical Center | N/A |
| Completed | Addressing Psychological Risk Factors Underlying Smoking Persistence in COPD Patients: The Fresh Start-II Stud NCT04646174 | Rush University Medical Center | N/A |
| Completed | Lung Cancer Screening Navigation for Homeless People NCT04308226 | Massachusetts General Hospital | N/A |
| Completed | THC Crossover Study NCT04429568 | University of California, San Francisco | N/A |
| Completed | Shrinking the Size of the Tobacco Power Wall NCT04632030 | RAND | N/A |
| Completed | Smartphone Application Smoking Cessation Study NCT04623736 | University of Virginia | N/A |
| Unknown | Tobacco Cessation Among Smokers Under Alcohol and/or Cannabis Treatment NCT04841655 | Institut Català d'Oncologia | — |
| Completed | Families With Substance Use and Psychosis: A Pilot Study NCT04284813 | Mclean Hospital | N/A |
| Completed | Smoking in the Paris Fire Brigade and Comparison According to the Type of Service (Permanent or On-call) NCT04566198 | Direction Centrale du Service de Santé des Armées | — |
| Completed | IQOS (Non-Cigarette Tobacco Product) Pilot Study NCT04357379 | Medical University of South Carolina | N/A |
| Completed | Salt-Based E-cigarette NCT04238832 | Medical University of South Carolina | N/A |
| Enrolling By Invitation | Antibiotic Prophylaxis in High-Risk Arthroplasty Patients NCT04297592 | Mayo Clinic | Phase 4 |
| Completed | CSD190601: A Study to Determine Subject Puffing Patterns of Electronic Nicotine Delivery Systems in an Ambulat NCT04308434 | RAI Services Company | N/A |
| Completed | CSD190401: A Study to Assess Elements of Abuse Liability for Nicotine-containing Pouch Tobacco Products NCT04372290 | RAI Services Company | N/A |
| Completed | Engaging Sexual and Gender Minority Cigarette Smokers Into Social Media-based Treatment NCT04461288 | University of California, San Francisco | N/A |
| Unknown | Effectiveness of Tobacco Cessation Interventions in Sweden NCT04819152 | Lund University | — |
| Suspended | Influence of Tobacco Use on Cannabis Use NCT03766971 | New York State Psychiatric Institute | Phase 2 |
| Unknown | Comparative Tobacco Interventions for Individuals With Severe and Persisting Behavioral Health Disorders NCT04523948 | Rose Research Center, LLC | — |
| Completed | Testing Legally Feasible Options: Study 1 NCT04259749 | RAND | N/A |
| Completed | Reducing Tobacco Exposures Among African American Women and Children NCT03476837 | University of Arkansas | N/A |
| Completed | CSD190501: A Study to Determine Subject Puffing Patterns of an Electronic Nicotine Delivery System in an Ambul NCT04226404 | RAI Services Company | N/A |
| Unknown | Screening While You Wait 2: Alcohol and Tobacco Use NCT04594304 | Women's College Hospital | N/A |
| Completed | Connecting Alaska Native People to Quit Smoking NCT03645941 | Mayo Clinic | N/A |
| Completed | CSD190301: A Study to Assess Elements of Abuse Liability for Two Dissolvable Nicotine Lozenge Tobacco Products NCT04167384 | RAI Services Company | N/A |
| Completed | JUUL vs. Mod E-cigarette Study NCT04237272 | Medical University of South Carolina | N/A |
| Completed | CSD190203: A Study to Determine Subject Puffing Patterns of an Electronic Nicotine Delivery System in an Ambul NCT04104152 | RAI Services Company | N/A |
| Completed | Evaluating Selected Constituents in the Exhaled Breath Samples NCT04143256 | Juul Labs, Inc. | N/A |
| Completed | CSD190202: Study to Assess Elements of Abuse Liability for Two Electronic Nicotine Delivery Systems NCT04094363 | RAI Services Company | N/A |
| Withdrawn | A Community-University Approach to Preventing HIV NCT03938077 | University of Michigan | N/A |
| Completed | Expanding the Click City Tobacco Prevention Program to Include E-cigarettes and Other Novel Tobacco Products NCT03682900 | Oregon Research Behavioral Intervention Strategies, Inc. | N/A |
| Withdrawn | Effects of Electronic Cigarettes in Cigarette Smokers With Mild to Moderate COPD NCT03379025 | Massachusetts General Hospital | N/A |
| Completed | Changes in Biomarkers of Cigarette Smoke Exposure After Switching Either Exclusively or Partly to JUUL ENDS NCT04107779 | Juul Labs, Inc. | N/A |
| Completed | Addressing Psychological Risk Factors Underlying Smoking Persistence in COPD Patients: The Fresh Start Study NCT04043728 | Rush University Medical Center | N/A |
| Active Not Recruiting | Comparing an Opt-out to an opt-in Approach for Smoking Cessation in VA Primary Care Clinics NCT03477435 | VA Office of Research and Development | N/A |
| Completed | CSD190101: A Study to Assess Nicotine Pharmacokinetic Parameters After Use of Two Smokeless Tobacco Products NCT03993769 | RAI Services Company | N/A |
| Completed | CSD190102: A Study to Assess Nicotine Pharmacokinetic Parameters After Use of Two Smokeless Tobacco Products NCT03993782 | RAI Services Company | N/A |
| Completed | CSD190103: A Study to Assess Nicotine Pharmacokinetic Parameters After Use of Two Smokeless Tobacco Products NCT03993795 | RAI Services Company | N/A |
| Withdrawn | The Impact of E-liquid Nicotine Content on Reinforcement in Current Smokers NCT03186911 | Wake Forest University Health Sciences | N/A |
| Terminated | Impact of Cigarette and E-cigarette Flavors on Adult Smoking Behavior NCT04009850 | Yale University | N/A |
| Withdrawn | E-Cigarette and Cigarette Nicotine Delivery and Abuse Liability in Cigarette Smokers and Dual Users NCT03943706 | University of Oklahoma | — |
| Completed | BRP1802 Smoking Abstinence Study NCT04979013 | RAI Services Company | N/A |
| Completed | Promoting Smoking Cessation in Lung Cancer Screening Through Proactive Treatment NCT03612804 | VA Office of Research and Development | N/A |
| Completed | Persistence Targeted Smoking Cessation in Serious Mental Illness (SMI) NCT03873337 | Rutgers, The State University of New Jersey | N/A |
| Completed | Impact of E-cigarette Characteristics on Reinforcement and Tobacco Use Patterns NCT03844672 | Medical University of South Carolina | N/A |
| Completed | E-Cigarette Effects on Markers of Cardiovascular and Pulmonary Disease NCT03863509 | University of Wisconsin, Madison | — |
| Completed | Electronic Cigarette Unit Price Manipulations in the Experimental Tobacco Marketplace NCT03843047 | Virginia Polytechnic Institute and State University | N/A |
| Completed | Development of a Mindfulness-Based Treatment for the Reduction of Alcohol Use and Smoking Cessation NCT03734666 | H. Lee Moffitt Cancer Center and Research Institute | N/A |
| Completed | Jail-Based Use of Smoking Cessation Treatment Study NCT03799315 | Hennepin Healthcare Research Institute | N/A |
| Completed | Connection to Health for Smokers NCT03680599 | University of California, San Francisco | N/A |
| Completed | Clinical Study Comparing 7 ENDS Products and 1 Combustible Cigarette Using 2 Delivery Methods. NCT03700112 | Juul Labs, Inc. | N/A |
| Completed | Baby Albert: Electronic Cigarette Pharmacokinetics (PK) and Abuse Liability NCT03637452 | University of Oklahoma | — |
| Completed | An Extended Facebook Intervention for Young Sexual and Gender Minority Smokers NCT03553992 | University of California, San Francisco | N/A |
| Completed | CSD1805: Study to Assess Nicotine Uptake and Product Use Behavior in Moist Snuff Consumers Using Two Moist Snu NCT03688776 | RAI Services Company | N/A |
| Completed | United States Pre-Market Tobacco Application Pharmacokinetics NCT03719391 | Juul Labs, Inc. | N/A |
| Completed | COMET2 Project 1 Filter Ventilation Study NCT03637972 | Masonic Cancer Center, University of Minnesota | Phase 3 |
| Completed | A Study to Characterize Puff Topography With Use of JUUL 5% Electronic Nicotine Delivery Systems (ENDS) in Adu NCT03596034 | Juul Labs, Inc. | N/A |
| Unknown | Assessing Tobacco Product Choice When the Cost of Menthol Cigarettes Increases NCT03612349 | Brown University | N/A |
| Completed | Evaluating and Improving the Sustainability of State-level Tobacco Control Programs in the United States NCT03598114 | Washington University School of Medicine | N/A |
| Completed | Comparing the Pharmacokinetics of Nicotine Salt Based ENDS in Healthy Smokers NCT03593239 | Juul Labs, Inc. | N/A |
| Completed | A Study to Assess Changes in Cigarette Consumption During a Switch to Very Low Nicotine Cigarettes NCT03571724 | 22nd Century Group, Inc. | N/A |
| Completed | A Study to Evaluate Changes in Smokers Using Oral Tobacco-derived Nicotine Products. NCT03692078 | Altria Client Services LLC | N/A |
| Completed | Clinical Outcomes of a Nationwide, Naturalistic E-Cig Trial (CONNECT) NCT03453385 | Medical University of South Carolina | N/A |
| Completed | A Laboratory Model of Increasing Delta-9-tetrahydrocannabinol (THC) Potency on Cigarette Smoking NCT02961309 | Battelle Memorial Institute | Phase 1 |
| Completed | Evaluation of Abuse Liability of Very Low Nicotine (VLN) Mentholated Cigarettes NCT03559725 | 22nd Century Group, Inc. | Phase 1 |
| Completed | A Guided Imagery Tobacco Cessation Intervention Delivered by a Quit Line and Website NCT02968381 | University of Arizona | N/A |
| Completed | A Facebook Intervention for Young Sexual and Gender Minority Smokers NCT03259360 | University of California, San Francisco | N/A |
| Completed | Evaluation of the Abuse Liability of Very Low Nicotine (VLN) Cigarettes NCT03559751 | 22nd Century Group, Inc. | Phase 1 |
| Terminated | Cross-Sectional Survey on the Use of Tobacco Products - Italy NCT03527004 | Philip Morris Products S.A. | — |
| Terminated | Cross-Sectional Survey on the Use of Tobacco Products - Germany NCT03527017 | Philip Morris Products S.A. | — |
| Terminated | Cross-Sectional Survey on the Use of Tobacco Products - London (UK) NCT03527030 | Philip Morris Products S.A. | — |
| Completed | Identify Biomarkers of Tobacco Exposure and Nicotine Uptake From JUUL 5% in Adult Smokers NCT03463837 | Juul Labs, Inc. | N/A |
| Unknown | Investigation of Cigarette Cravings in Smokers NCT04843969 | Marco Leyton | N/A |
| Completed | Electronic Cigarette Use in Young Adult Men and Women NCT03089541 | Yale University | N/A |
| Terminated | Electroretinogram: a New Human Biomarker for Smoking Cessation Treatment NCT03213418 | New York State Psychiatric Institute | N/A |
| Active Not Recruiting | Post Acute Cardiac Event Smoking (PACES) Study NCT03413423 | Hennepin Healthcare Research Institute | N/A |
| Completed | Faith Based Pilot Intervention to Reduce Tobacco Use Among Somali Males NCT03379142 | University of Minnesota | N/A |
| Terminated | Pregnancy, Mindfulness, and Massage NCT03276208 | Yale University | N/A |
| Unknown | Address Tobacco Use Among Adolescents in Hong Kong NCT03264144 | The University of Hong Kong | N/A |
| Unknown | Tobacco Use and Uptake of COVID-19 Vaccinations NCT05479383 | Finnish Institute for Health and Welfare | — |
| Withdrawn | Mechanisms of Ethnic/Racial Differences in Lung Cancer Due to Cigarette Smoking Clinical and Biomarkers Core NCT03352635 | University of Minnesota | — |
| Completed | EMA for Tobacco Control Policy Research NCT03235713 | The University of Hong Kong | — |
| Completed | Provider Training in Increasing Patient Tobacco Cessation Counseling and Referrals for Patients With Cancer Un NCT03135782 | OHSU Knight Cancer Institute | N/A |
| Completed | Helping Poor Smokers Quit NCT03194958 | Washington University School of Medicine | N/A |
| Completed | CSD170201: A Study to Evaluate the Exposure to Tobacco Constituents From Two Moist Snuff Products NCT03153761 | RAI Services Company | N/A |
| Completed | CSD170202: A Study to Evaluate the Exposure to Tobacco Constituents From Two Moist Snuff Products NCT03158428 | RAI Services Company | N/A |
| Completed | The Lung Screening, Tobacco and Health Project NCT03200236 | Georgetown University | Phase 3 |
| Completed | Evaluation of a Brief Tobacco Intervention in the US Military NCT03196102 | University of Virginia | N/A |
| Completed | Minocycline and Tobacco Craving in Smokers With Schizophrenia NCT02968602 | University of Maryland, Baltimore | Phase 4 |
| Completed | Characterization of Selected Aerosol Constituents Levels in the Exhaled Breath of Adult e-Vapor Users NCT04881942 | Altria Client Services LLC | N/A |
| Completed | Impact of Switching to Non-Menthol Cigarettes Among Smokers NCT03075839 | Yale University | N/A |
| Completed | Mobile-based Peer Mentoring for Smoking Cessation NCT03048786 | University of California, San Francisco | N/A |
| Unknown | Tobacco Treatment TrAining Network in Greece & Cyprus NCT03040349 | University of Crete | N/A |
| Withdrawn | Integrated Smoking Cessation and Mood Management for ACS Patients NCT03029923 | The Miriam Hospital | N/A |
| Completed | Biomarkers of Exposure and Biomarkers of Potential Harm in Adult Smokers Who Completely Switch to E-vapor Prod NCT04800211 | Altria Client Services LLC | N/A |
| Completed | Preventing Cigarette Use Among Urban Youth Via an M-Health Primary Care Preventive Intervention NCT03855410 | University of Michigan | N/A |
| Completed | BRP1602: Evaluation of Technical and Logistical Feasibility to Measure Lung Permeability NCT06105424 | RAI Services Company | N/A |
| Completed | Air Quality Feedback to Reduce Second-hand Smoke (SHS) Exposure in the Home NCT03151421 | Institut Català d'Oncologia | N/A |
| Completed | Metabolism-informed Care for Smoking Cessation NCT03227679 | Vanderbilt University Medical Center | N/A |
| Completed | CSD1601: A Study to Evaluate the Exposure to Tar and Nicotine From Two Cigarette Products That Contain a Menth NCT04529551 | RAI Services Company | N/A |
| Completed | Snuff Use, Smoking, Periodontitis and Mortality: 30-year Cohort Study From Sweden NCT03918902 | University of Helsinki | — |
| Completed | Snuff Use, Smoking, Periodontal Health and Premature Death: 30-year Study NCT03614871 | University of Helsinki | — |
| Completed | A Mobile Intervention to Promote Cessation in HIV-infected Smokers NCT02432482 | Montefiore Medical Center | N/A |
| Completed | QuitAdvisorDDS: A Point-of-Care Tobacco Cessation Tool for Dental Settings NCT02570646 | Jamie Studts | N/A |
| Completed | Pediatric Health Promotion Program NCT03322501 | Georgetown University | N/A |
| Completed | The Effect of AAT Training in Smokers NCT02481752 | University of Texas at Austin | N/A |
| Completed | Policy-Related Survey - Territory-wide Telephone Survey on Tobacco Control NCT02760550 | The University of Hong Kong | — |
| Completed | Smoking Cessation for Cervical Cancer Survivors NCT02157610 | H. Lee Moffitt Cancer Center and Research Institute | N/A |
| Completed | Expansion of the COPD At-risk Module in 4 States BRFSS Telephone Health Surveys NCT02991391 | Duke University | — |
| Completed | Employee Wellness Survey NCT02673346 | Mayo Clinic | — |
| Completed | Effect of Cigarette Pack Warnings and Packaging Among Young Adult Smokers NCT03446170 | Georgetown University | N/A |
| Completed | Influence of Tobacco Smoking on the Development of Obstructive Sleep Apnea (OSA) NCT03574740 | Astes | — |
| Completed | Biomarker Feedback to Motivate Tobacco Cessation in Pregnant ALaska Native Women: Phase 2 NCT02018640 | Mayo Clinic | — |
| Completed | A Study to Evaluate Changes in Smokers Using An Oral Tobacco-Derived Nicotine Product NCT04079933 | Altria Client Services LLC | N/A |
| Completed | Smoking Cessation for Young Adult Pacific Islanders: Motivating Pacifika Against Cigarettes and Tobacco NCT03238456 | Claremont Graduate University | N/A |
| Unknown | Dissemination of a Tailored Tobacco Quitline for Rural Veteran Smokers NCT01892813 | Mark Vander Weg | Phase 3 |
| Completed | Substance Use and Lifestyle-related Health Problems in Ageing Patients in OMT Treatment NCT05182918 | Sorlandet Hospital HF | — |
| Completed | Practice-based Intervention for Vietnamese and Korean Patients NCT03064724 | Asian Health Services | N/A |
| Completed | Biomarker Feedback to Motivate Tobacco Cessation in Pregnant Alaska Native Women NCT01605643 | Mayo Clinic | — |
| Completed | Effectiveness of a School-based Tobacco Prevention Program for Middle School Students in Saudi Arabia NCT03579355 | King Abdulaziz University | N/A |
| Completed | Tobacco Impact on Quality of Life on Snus-use, Dual Use, Smoke Use and Non-using. NCT05409963 | Vastra Gotaland Region | — |
| Completed | Effect of a Perioperative Smoking Cessation Program on Smoking Cessation/Reduction and Perioperative Complicat NCT01260233 | London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's | N/A |
| Completed | Testing Counseling Styles to Motivate Smokers to Quit NCT01188018 | University of Missouri, Kansas City | Phase 3 |
| Completed | Effectiveness of Pedialink CEASE Module NCT01087177 | Massachusetts General Hospital | N/A |
| Completed | Asian Youth and Tobacco Control Survey NCT00642317 | M.D. Anderson Cancer Center | — |
| Completed | Smoking Cessation Program Among Adolescents in Vocational Training Centers NCT00973570 | Institut National de la Santé Et de la Recherche Médicale, France | N/A |
| Completed | Gabapentin for Smoking Cessation NCT00578552 | Mayo Clinic | Phase 2 |
| Completed | Enhancing Smoker Utilization of the Minnesota Quitline Through Support Persons NCT01311830 | Mayo Clinic | N/A |
| Completed | Interactive Psychopharmacologic Effects of Alcohol and Nicotine in Humans NCT00616746 | Yale University | EARLY_Phase 1 |
| Withdrawn | Monitoring and Outcome Measures in Asthmatics and Smokers During Pregnancy NCT00425880 | University of Kentucky | — |
| Completed | Tobacco Cessation Treatment for Pregnant Alaska Natives NCT00379444 | Mayo Clinic | Phase 1 / Phase 2 |
| Completed | Telephone and Web-based Teen Tobacco Cessation in HMOs NCT00311948 | Kaiser Permanente | Phase 3 |
| Completed | Strategies to Help Adult ED Patients Quit Smoking NCT00297466 | National Institute on Drug Abuse (NIDA) | N/A |
| Completed | Emergency Department Initiated Tobacco Treatment (EDITT) NCT00252902 | National Institute on Drug Abuse (NIDA) | Phase 1 / Phase 2 |
| Completed | A Study to Examine Health Behavior Change Strategies for Primary Care NCT01323023 | University of Colorado, Denver | — |
| Completed | An Intervention to Address Parental Smoking During the Postpartum Hospitalization. NCT00844818 | Massachusetts General Hospital | N/A |
| Terminated | Early Tobacco Abstinence - 5 NCT00224965 | National Institute on Drug Abuse (NIDA) | Phase 1 |