Regulatory Landscape of Cannabis Warning Labels in US States with Legal Retail Nonmedical Cannabis, 2024.

Objectives. To characterize regulatory practices related to nonmedical cannabis warning labels in states across the United States that have legalized retail nonmedical cannabis. Methods. In March 2024, we conducted a content analysis of regulations for nonmedical cannabis warning labels required on product packages in 20 states where, as of March 2024, adults could legally purchase nonmedical cannabis in retail environments. For each state, we examined requirements related to warning label content and characteristics. Results. Required warning label content and characteristics varied widely across states. Only 2 states required a warning about mental health risks (10%) and 2 states required a warning for high potency products on risk of psychosis (10%). No states required front-of-package warning placement, only 2 states required rotating warnings (10%), and 4 states required contrasting colors (20%). Warnings were often verbose (mean = 57 words), vague, and had small or no minimum font size. Conclusions. Opportunities exist for states to improve the alignment of their nonmedical cannabis warning label regulations with evidence that has been generated so far in cannabis effects, cannabis warning efficacy, and warning label design. (Am J Public Health. 2024;114(S8):S681-S684. https://doi.org/10.2105/AJPH.2024.307722).