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Showing 1–24 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Health Warning Label Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Impact of E-cigarette Device Warnings

NCT05714982
View directory record Official record
Conditions
Vaping Behaviors
Interventions
Label with text health warning, Label with pictorial health warning, Label with neutral statements about vaping
Other
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
21 Years and older
Enrollment
1,369 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Developing and Evaluating Product Messaging

NCT04716010
View directory record Official record
Conditions
Cancer of Colon, Cancer of Rectum
Interventions
Control, Warning Labels, Tax, Combined Warning Labels and Tax
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
4,160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 17, 2023 · Synced Sep 3, 2026, 1:09 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Developing and Strengthening Cannabis Warnings: Warning Message Testing

NCT07699198
View directory record Official record
Conditions
Cannabis, Marijuana Use
Interventions
Constituents, Cognitive Functioning, Cardiovascular Health, Motor Vehicle Crashes, Dependence, Psychosis and Schizophrenia, Mental Health, Reproductive Health, Respiratory Health, Edibles, Cannabis Hyperemesis Syndrome, Control
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
1,500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impacts of Warning Labels on Ultra-Processed Foods

NCT06296355
View directory record Official record
Conditions
Health Behavior, Diet, Healthy
Interventions
Health Warning Label, Identity Warning Label, Barcode Label
Behavioral · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 55 Years
Enrollment
4,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 14, 2024 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Graphic Cigarette Warnings

NCT02247908
View directory record Official record
Conditions
Smoking
Interventions
Surgeon General's Warning, Graphic Warning
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
2,149 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
Oakland, California • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 13, 2016 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Cigarette Pack Constituent Disclosures

NCT02785484
View directory record Official record
Conditions
Cigarette Smoking Behavior
Interventions
Label with constituent disclosure message, Label with litter message
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years and older
Enrollment
784 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 7, 2017 · Synced Sep 3, 2026, 1:09 AM EDT
Active, not recruiting Not applicable Interventional

A Novel Remote Patient and Medication Monitoring Solution to Improve Adherence and PerSiStence With IBD Therapy

NCT05316584
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Crohn Disease, Ulcerative Colitis
Interventions
Remote monitoring
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 80 Years
Enrollment
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
5
States / cities
Baltimore, Maryland • New York, New York • Chapel Hill, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Front-of-package Warning Labels on Perceived Weight Stigmatization

NCT06179043
View directory record Official record
Conditions
Weight Stigma
Interventions
Nutrient warning labels, Text-only health warning labels, Graphic health warning labels, Control labels
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years and older
Enrollment
2,522 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 12, 2024 · Synced Sep 3, 2026, 1:09 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Developing and Testing Health Warning Labels on the ENDS Device

NCT04907136
View directory record Official record
Conditions
Electronic Cigarette Use
Interventions
Preferred ENDS, Preferred ENDS with HWL
Other
Lead sponsor
Florida International University
Other
Eligibility
21 Years to 35 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Impact of Sugar-Sweetened Beverage Health Warnings

NCT03511937
View directory record Official record
Conditions
Dietary Habits
Interventions
Sugar-Sweetened Beverage Health Warning Label, Neutral Label
Behavioral · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 29, 2021 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Are Sugar-Sweetened Beverage Information Labels Well-Targeted

NCT05038163
View directory record Official record
Conditions
Soft Drink Consumption, Sugar-sweetened Beverages, Information Labels
Interventions
Nutrition Facts, Text Warning, Graphic Warning
Other
Lead sponsor
National Bureau of Economic Research, Inc.
Other
Eligibility
18 Years and older
Enrollment
5,845 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Dec 10, 2024 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional

Testing the Influence of Different Sugary Drink Warning Label Designs

NCT03648138
View directory record Official record
Conditions
Obesity, Weight Gain, Diabetes Type 2
Interventions
Sugary drink warning labels
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
1,016 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 10, 2020 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Reactions to Warnings on Hookah Ads

NCT03723616
View directory record Official record
Conditions
Reactions to Warnings, Hookah Smoking
Interventions
Ads Only, Ads with text-only health warning labels (HWLs), Ads with text + graphic health warning labels (HWLs)
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years to 34 Years
Enrollment
2,588 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Improving Prescription Drug Warning Labels

NCT00846209
View directory record Official record
Conditions
Enhanced Text, Enhanced Text + Icon
Interventions
Enhanced drug labeling
Other
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 13, 2023 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Alcohol Labeling Study

NCT06835920
View directory record Official record
Conditions
Health Behavior
Interventions
Front-of-package health warning, Control label
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years and older
Enrollment
724 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
2
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Reactions to Social Media Warning Labels Among Teens and Young Adults

NCT07199660
View directory record Official record
Conditions
Screen Time Exposure
Interventions
Human-developed negative body image warning, Voluntary warning, Human-developed depression and anxiety warning, Human-developed addiction warning, Human-developed sleep warning, Human-developed mental health harms to young people warning, Human-developed warning that social media has not been proven safe, Control message, California's proposed social media warning, Artificial-intelligence-developed depression and anxiety warning, Artificial-intelligence-developed negative body image warning, Artificial-intelligence-developed addiction warning, Artificial-intelligence-developed sleep warning, Artificial-intelligence-developed mental health harms to young people warning, Artificial-intelligence-developed warning that social media has not been proven safe
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
13 Years to 29 Years
Enrollment
1,012 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of UPF Warning Labels on Social Media Among Teens and Young Adults

NCT07227519
View directory record Official record
Conditions
Nutrition, Healthy Diet, Food Preferences
Interventions
UPF Warning Labels, No Labels (Control)
Behavioral
Lead sponsor
University of Tennessee
Other
Eligibility
13 Years to 29 Years
Enrollment
1,012 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Developing and Testing Waterpipe-specific Health Warning Labels

NCT05317663
View directory record Official record
Conditions
Waterpipe Smoking, Health Warning Label, Harm Perception, Puffing Behaviour, Quitting Smoking, Health Risk Behaviors
Interventions
Test Health Warning Label (HWL), Test without Health Warning Label (no-HWL)
Behavioral
Lead sponsor
Florida International University
Other
Eligibility
21 Years to 35 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Online Study of the Effects of Sugary Drink Warning Labels on Consumption

NCT05079477
View directory record Official record
Conditions
Food Preferences
Interventions
Exposure to sugar-sweetened beverage warning labels, Exposure to calorie information
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
216 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 3, 2024 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Cigarette Pack Inserts for Smoking Cessation

NCT04075682
View directory record Official record
Conditions
Smoking Cessation
Interventions
Inserts with efficacy messages, Pictorial warnings on packs
Other
Lead sponsor
University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
387 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
2
States / cities
Ithaca, New York • Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated May 12, 2024 · Synced Sep 3, 2026, 1:09 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effects of Sugary Drink Warning Labels

NCT03654586
View directory record Official record
Conditions
Obesity, Diabetes, Weight Gain
Interventions
Sugary drink warning labels
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
337 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 22, 2021 · Synced Sep 3, 2026, 1:09 AM EDT
Recruiting Not applicable Interventional

Testing Warning Labels for Retail Cannabis Products Using a Discrete Choice Experiment

NCT07701304
View directory record Official record
Conditions
Cannabis Use, Risk Perception, Decision Making
Interventions
Discrete choice experiment (DCE) survey-experiment
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
21 Years and older
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jul 26, 2026 · Synced Sep 3, 2026, 1:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pictorial Warning Labels & Memory for Relative & Absolute Cigarette Health-risk Information Over Time in Adult Smokers

NCT03499340
View directory record Official record
Conditions
Smoking Cessation, Smoking, Cigarette
Interventions
text-only PWL, low arousal graphic PWL, high arousal graphic PWL, absolute risk, relative risk
Behavioral
Lead sponsor
Ohio State University
Other
Eligibility
19 Years to 64 Years
Enrollment
3,213 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 16, 2018 · Synced Sep 3, 2026, 1:09 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Evaluating the Impact of Psychotherapeutic Advertising Claims on Cannabis Purchasing

NCT07216911
View directory record Official record
Conditions
Anxiety, Depression, Cannabis Use
Interventions
CC, PAC, WL
Behavioral
Lead sponsor
Trustees of Dartmouth College
Other
Eligibility
21 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 3, 2026, 1:09 AM EDT