Self‐reported THC content and associations with perceptions of feeling high among cannabis consumers

Abstract

Introduction Few studies have examined consumer knowledge and communication of tetrahydrocannabinol (THC) content among cannabis consumers, including potential differences by cannabis legislation. The study sought to: (i) examine self‐reported knowledge of THC content across 10 cannabis products; (ii) examine self‐reported intoxication levels; and (iii) examine association between self‐reported THC levels and intoxication levels. Methods Repeat cross‐sectional surveys were conducted in Canada and the United States in September–November 2020 as part of the International Cannabis Policy Study. Respondents were past 12‐month cannabis consumers, aged 16–65 (n = 13,689). A weighted logistic regression model examined the association between expected intoxication of dried flower, jurisdiction and frequency of cannabis use. Results Across all 10 cannabis products, approximately two‐thirds of consumers did not know the quantitative THC level of the cannabis product they last used. Qualitative levels of THC (e.g., ‘low’ or ‘high’ THC) showed moderate correspondence with quantitative self‐reported THC levels for most products. Approximately half of consumers across all products reported achieving their desired intoxication level at last use, with higher levels among more frequent consumers and Canadian consumers of dried flower (F = 2.54, p = 0.019). Discussion and Conclusions Overall, comprehension of THC levels in cannabis products is low among consumers in both illegal and legal markets.

Adverse outcomes of cannabis use in Canada, before and after legalisation of non-medical cannabis: cross-sectional analysis of the International Cannabis Policy Study

“…The range of products associated with adverse events suggests that events are not attributable to a single product type or mode of administration; rather, consumers appear to have difficulty identifying and consuming the appropriate dose to avoid overconsumption. [41][42][43] Edibles were the third most commonly used product associated with adverse events prior to legalisation; however, the proportion of adverse events associated with edibles decreased from 38% in 2018 to 4% in 2021. This decrease in edibles' association with adverse events occurred despite substantial increases in the use of edibles among Canadians who consume cannabis over the same period.…”