Testing warning labels on cannabis packaging to see what design helps people notice risks
Official title: Developing and Testing Warning Labels for Retail Cannabis Products
Run by University of Oklahoma · NCT07701304 · Data updated 2026-11-12
Researchers are testing different cannabis warning labels to see which designs make people notice health risks and think about their use more carefully.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 21 Years and up |
| Sex | All |
| Enrollment | 450 (estimated) |
| Sponsor | University of Oklahoma Academic / other |
| Locations | 1 site (Oklahoma City, Oklahoma) |
| Status | Recruiting |
| Started | May 19, 2026 |
| Main results expected | December 31, 2026 |
| Study ends | December 31, 2026 |
| Registry record updated | July 27, 2026 |
| Trial ID | NCT07701304 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults 21+ who currently use cannabis and live in states with legal retail cannabis markets, proficient in English, and able to participate online.
✕Probably not a fit
Individuals who do not use cannabis or who do not reside in legal retail states may not benefit from the study results.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This study uses a discrete choice experiment delivered online to residents of states with legal retail cannabis. Participants who are 21 or older and have used cannabis in the last 30 days will evaluate imagined product packaging with varying warning features. The goal is to identify a combination of label design elements that most effectively raise risk awareness and influence use intentions. The survey presents 16 randomized choice sets, each containing four product images, ensuring balanced representation of attribute levels. Results could inform regulatory guidance for cannabis packaging and risk communication.
Why it matters
Potential benefit: If successful, findings could guide regulators and manufacturers in designing more effective health warnings on cannabis products.
How similar studies have gone: Prior work using discrete choice experiments has helped inform risk communication design in other products, though cannabis-specific packaging research is developing.
Who can join: the full rules
Show full inclusion / exclusion criteria
Eligibility for participation includes: 1) being 21 years of age or older, 2) being able to speak and understand English, 3) self-reported having consumed cannabis in the last 30 days (any mode, e.g., flower, vape, edible, etc.), and 4) residing in a U.S. state or jurisdiction where retail (i.e., non-medical) cannabis use is legal.
Where it's running
-
University of OKlahoma
Oklahoma City, Oklahoma, United States Recruiting
Study contacts
- Principal investigator: Zachary Massey, PhD — University of Oklahoma
- Study coordinator: Zachary Massey, PhD
- Email: Zachary-Massey@ou.edu
- Phone: 405-271-6872
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.