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

Assess Biomarkers of Tobacco Exposure and Nicotine Pharmacokinetics in Smokers After a 5-Day In-Clinic Confinement Switch to an Electronic Cigarette or Nicotine Gum

NCT02323438
View directory record Official record
Conditions
Smoking
Interventions
Usual Brand Cigarette, Electronic Cigarette #1, Electronic Cigarette #2, Leading U.S. Nicotine Gum
Other
Lead sponsor
R.J. Reynolds Vapor Company
Industry
Eligibility
21 Years to 60 Years
Enrollment
153 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 31, 2018 · Synced Sep 25, 2026, 10:58 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Using Nicotine to Reverse Age-related Auditory Processing Deficits

NCT04971954
View directory record Official record
Conditions
Auditory Perceptual Impairment, Aging
Interventions
Nicotine gum, Placebo gum
Other
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional

A Systematic Oral Care Program in Post-Mechanically Ventilated, Post-Intensive Care Patients

NCT03886623
View directory record Official record
Conditions
Methicillin-resistant Staphylococcus Aureus, Methicillin-Sensitive Staphylococcus Aureus Infection
Interventions
4-day systematic oral hygiene, Standard of Care oral care
Procedure · Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 21, 2019 · Synced Sep 25, 2026, 10:58 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Abuse Liability and Appeal of Oral Nicotine Products

NCT06506162
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Flavor, Nicotine concentration
Other
Lead sponsor
University of Southern California
Other
Eligibility
21 Years to 25 Years
Enrollment
320 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Socket Preservation Procedure Studying Soft and Hard Tissue Outcomes

NCT03497403
View directory record Official record
Conditions
Ridge Preservation, Bone Regeneration
Interventions
Socket preservation control, Socket preservation experimental
Procedure
Lead sponsor
Harvard School of Dental Medicine
Other
Eligibility
20 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 12, 2018 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Results available

Quit For Life (QFL): Smoking Cessation Among Chinese Smokers Living With HIV

NCT05020899
View directory record Official record
Conditions
Smoking Cessation, HIV Infections
Interventions
Sessions with a trained counselor, Cell phone messages, Offered nicotine replacement therapy, Self-help guide for quitting smoking
Behavioral · Other
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years and older
Enrollment
109 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 11, 2024 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Assess the Ingestion of Dentifrice by Children

NCT02409836
View directory record Official record
Conditions
Healthy Individuals
Interventions
Marketed Dentifrice, Marketed Flavored Dentifrice
Drug
Lead sponsor
Procter and Gamble
Industry
Eligibility
2 Years to 12 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1993
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 6, 2015 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Clinical Study to Evaluate the Effectiveness of an Experimental Toothpaste in Improving Gum Health and Reducing Plaque Accumulation

NCT07255040
View directory record Official record
Conditions
Dental Plaque, Gingivitis
Interventions
Test Dentifrice, Parodontax Complete Protection, Colgate Cavity Protection
Drug
Lead sponsor
HALEON
Industry
Eligibility
18 Years and older
Enrollment
284 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 25, 2026, 10:58 PM 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 25, 2026, 10:58 PM EDT
Terminated Phase 2 Interventional

Efficacy & Safety of RPh201 Treatment in Patients With Previous Nonarteritic Anterior Ischemic Optic Neuropathy (NAION)

NCT03547206
View directory record Official record
Conditions
Nonarteritic Anterior Ischemic Optic Neuropathy
Interventions
RPh201 Cohort A, Placebo Cohort A, RPh201 Cohort B, Placebo Cohort B
Drug · Other
Lead sponsor
Regenera Pharma Ltd
Industry
Eligibility
50 Years and older
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
15
States / cities
Palo Alto, California • Pasadena, California • Orange, Connecticut + 12 more
Source: ClinicalTrials.gov public record
Updated Oct 11, 2020 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Phase 4 Interventional

Dissemination of Tobacco Tactics for Hospitalized Smokers

NCT01309217
View directory record Official record
Conditions
Smoking Cessation
Interventions
Tobacco Tactics Intervention, Usual Care
Behavioral · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
1,528 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
6
States / cities
Grand Rapids, Michigan • Livonia, Michigan • Muskegon, Michigan + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 17, 2014 · Synced Sep 25, 2026, 10:58 PM EDT
Terminated Not applicable Interventional Results available

Analysis of Aldehyde Biomarkers of Exposure and Host Response

NCT00482690
View directory record Official record
Conditions
Smoking Cessation
Interventions
nicotine polacrilex, nicotine transdermal system, nicotine inhaler
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 6, 2023 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Phase 4 Interventional Results available

Identifying Optimal Smoking Cessation Intervention Components (Cessation)

NCT01116986
View directory record Official record
Conditions
Smoking, Smoking Cessation, Nicotine Dependence
Interventions
Counseling before quit attempt, Minimal In-person counseling during quit attempt, Intensive in-person counseling during the quit attempt, Minimal phone counseling during the quit attempt, Intensive phone counseling during the quit attempt, Long Term Nicotine Patch+ Nicotine Gum During Quit Attempt, Short Term Nicotine Patch + Nicotine Gum during the quit attempt, Pre-Quit Nicotine Gum, Pre-Quit Nicotine Patch, Pre-Quit Nicotine Patch + Pre-Quit Nicotine Gum
Behavioral · Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 99 Years
Enrollment
637 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 10, 2015 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Return of Bowel Function After One or Two Level Anterior Lumbar Interbody Fusion With Chewing Gum

NCT03945461
View directory record Official record
Conditions
Spondylosis, Spondylolisthesis, Neurogenic Claudication, Foraminal Stenosis
Interventions
Chewing gum
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 85 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 25, 2024 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional

Evaluation of Cessation Preferences of Menthol Smoker

NCT02020005
View directory record Official record
Conditions
Smoking Cessation
Interventions
Non-flavored 2mg nicotine gum, Non-flavored 4mg nicotine gum, Mint-flavored 2mg nicotine gum, Mint-flavored 4mg nicotine gum, Non-flavored nicotine inhaler, Mint-flavored nicotine ihaler
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Potential of Stannous Fluoride Toothpaste to Reduce Gum Disease

NCT02750943
View directory record Official record
Conditions
Gingivitis
Interventions
Stannous Fluoride, Sodium Monofluorophosphate
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
253 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Oct 25, 2017 · Synced Sep 25, 2026, 10:58 PM EDT
Not yet recruiting Phase 1Phase 2 Interventional

The Effect of Dexamethasone on Short Term Patient Response: IV vs Oral Administration

NCT07832110
View directory record Official record
Conditions
Post Operative Pain, Acute, Periodontitis
Interventions
Dexamethasone IV injection, Dexamethasone Capsule, Placebo IV administration, Placebo capsule
Drug · Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional

PD Study to Assess Phosphate Binding Characteristics of K2CG Chewing Gum

NCT01319578
View directory record Official record
Conditions
Hyperphosphatemia, Chronic Kidney Disease
Interventions
K2CG chewing gum
Other
Lead sponsor
Denver Nephrologists, P.C.
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 14, 2011 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Dental Implants and Mouth Rinse

NCT02002442
View directory record Official record
Conditions
Reduction in Bacterial Counts Through the Use of Mouthwash
Interventions
Mouthwash
Other
Lead sponsor
Tufts University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 4, 2018 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional

Innovations to Prevent Relapse Among Low-income African American Smokers

NCT03982576
View directory record Official record
Conditions
Smoking Cessation
Interventions
Nicotine replacement therapy (NRT), CS-CBT intervention, Path2Quit, Relapse prevention program, SmokefreeTXT
Other · Behavioral
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Results available

Patch Study - Intervention for HIV Positive Smokers

NCT02982772
View directory record Official record
Conditions
Smoking Cessation, HIV
Interventions
Combination Therapy, Standard Care Intervention
Other
Lead sponsor
dr. maria miguez
Other
Eligibility
18 Years and older
Enrollment
488 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 5, 2021 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional

Project Phoenix: Pilot Intervention for Smokers Who Are Not Ready to Quit Smoking

NCT03405129
View directory record Official record
Conditions
Smoking Cessation, Motivation
Interventions
Phoenix, NRT order button, Factoid
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years and older
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 10, 2023 · Synced Sep 25, 2026, 10:58 PM EDT
Not yet recruiting Not applicable Interventional

Early Time-Restricted Eating for Cardiovascular Health

NCT07634926
View directory record Official record
Conditions
Hypertension, Breakfast Skipper
Interventions
Early Time-Restricted Eating (eTRE)
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
60 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 25, 2026, 10:58 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Empowering LGBTQ+ Tobacco Cessation Pilot

NCT05365633
View directory record Official record
Conditions
Smoking Cessation
Interventions
Empowerment activity-enhanced tobacco cessation assistance
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 14, 2025 · Synced Sep 25, 2026, 10:58 PM EDT