Pot users who remember seeing mental health warnings are actually more likely to be high-risk daily users.
March 19, 2026
Original Paper
Chasing the High: Cannabis Mental Health Warning Label Recall is Associated with Greater, Not Lesser, High-Risk Use in a National Canadian Sample
SocArXiv · znrhe_v1
The Takeaway
While warning labels are designed to discourage dangerous behavior, this study found that Canadian users who recalled the mandatory THC-mental health warnings actually reported double the rate of harmful mental health impacts and were more likely to use the drug at work. The labels are reaching the intended audience but may be completely failing to change the behavior of those at highest risk.
From the abstract
Background: Canada mandates health warning labels on all cannabis products, including a warning linking frequent THC use to long-term mental health problems. Whether exposure to these warnings reduces high-risk use among cannabis consumers remains unknown. Methods: Data were drawn from the 2024 Canadian Cannabis Survey (n=11,666), focusing on 2,197 past-year cannabis users who reported seeing warning messages. Cross-tabulations and chi-square tests tested associations between recall of the THC m