ReviewPreventive medicine reports2024
A systematic review of cannabis health warning research.
Review in Preventive medicine reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
20 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Health education interventions to reduce cannabis and tobacco smoking-related harms among people who use cannabis: a systematic review.Health education research · 2026Pooled it
- Assessing Responses to Cannabis Health Warnings Among Adults in U.S. Recreational States.American journal of preventive medicine · 2025Trial
- Impact of Delta-8-THC warning labels on perceived intoxication, harm, and susceptibility among adolescents.The International journal on drug policy · 2025Trial
- Exploring the effects of cannabis health warnings on protective health intentions among US adults in legal recreational states.The International journal on drug policy · 2024Trial
- Benefits and risks of consuming Cannabis sativa L. in food.Journal of food and drug analysis · 2026Review
- Characteristics of cannabis warnings in the United States: A content analysis.Preventive medicine reports · 2026Article
- International Policy Approaches for Higher THC Cannabis Products: Are They Applicable to the Australian Medicinal Cannabis Framework?Drug and alcohol review · 2026Review
- Perceptions of Cannabis Vaping Advertising Messages and Warnings Among US Young Adults.Substance use & addiction journal · 2026Article
- Knowledge about the health effects of cannabis before and after legalization of 'recreational' cannabis in Canada: findings from the International Cannabis Policy Study, 2018-2024.Journal of cannabis research · 2026Article
- Impact of Simple Versus Complex Cannabis Advertising Messages and Warnings on US Young Adults' Product Perceptions.Substance use & addiction journal · 2026Article
- Effects of textual warnings and warning symbols on cannabis advertisements on product perceptions among US young adults.Health education research · 2026Article
- Content Analysis of Derived Intoxicating Cannabis Vape Product Attributes and Marketing In an Online Retail Environment.Substance use & misuse · 2026Article
- Exploratory analysis of United States-based cannabis product health benefit claims on online marketplaces.Addiction (Abingdon, England) · 2025Article
- "Well, if they exist, I ignore them": A focus group study of recall and reactions to cannabis health warnings by cannabis consumers in the United States.Preventive medicine reports · 2025Article
- Profiles of cannabis use and expense-related factors among US young adults.Addictive behaviors · 2025Article
- Labeling of Cannabis Products From Licensed and Unlicensed Retailers in New York.American journal of preventive medicine · 2025Article
- Pictorial warning labels reduce sharing intentions, blunt self-relevance processes elicited by social media posts promoting cannabis edibles.The Journal of communication · 2025Article
- Perceptions of cannabis warnings and recommendations for improvement: a qualitative study with people who use cannabis from the United States.BMC public health · 2025Article
- Cannabis Access by Retailer Type in New York.Pediatrics · 2025Article
- Regulatory Landscape of Cannabis Warning Labels in US States with Legal Retail Nonmedical Cannabis, 2024.American journal of public health · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
Abstract
Background: Cannabis legalization provides an opportunity to communicate with consumers through mandated health warnings on cannabis packaging. However, research on cannabis health warnings is a nascent field. Therefore, a review is needed to synthesize cannabis health warning research and inform ongoing policy discussions. Methods: This paper used systematic review guidelines to search online databases, including PubMed Central, Scopus, Web of Science, Jstor, Communication and Mass Media Complete, Medline, PsycINFO, and Google Scholar. Search strings combined the terms "cannabis" or "marijuana" with "health warning" or "health warning message" or "warning label" or "health warning label" or "health information label." Results were synthesized narratively. Results: The search identified 90 research articles. After screening, 17 studies on the impact of cannabis health warnings were retained. Retained studies focused on the hypothetical effects of cannabis health warnings ( Conclusions: Health warnings on cannabis packaging are an important strategy to communicate risk to consumers. Mandating warnings increased notice, recall, and health knowledge. Warnings with pictures and describing specific risks were most effective, as was showing warnings without product branding.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.