Objective Cannabis is increasingly used for medical purposes, particularly in countries like Canada where cannabis was recently legalized for recreational use. We aimed to assess self-medication with cannabis post-cannabis legalization among adults in the Canadian province of Quebec. Methods This is a cross-sectional online survey of a self-selected convenience sample conducted in Quebec, Canada, from November 2020 to January 2021. Individuals aged ≥ 21 years who endorsed using cannabis bought in legal recreational cannabis stores to self-medicate a health condition were included. Data were analyzed using descriptive statistics and stratified according to sex, age, and the type of cannabis use (exclusively medical versus medical and recreational use). Results Four hundred eighty-nine participants were included. The median age was 34 years, and 48% were women. About 25% reported exclusive medical use of cannabis. Treated conditions included anxiety (70%), insomnia (56%), pain (53%), depression (37%), and many others. Reasons for not consulting in cannabis clinics included lack of information (52%), the complexity of the process (39%), accessibility of cannabis clinics (23%), and others. Tetrahydrocannabinol (THC) dosage > 20% was reported by 32%. Smoking was the main route of use (81%). Possession of prescribed drugs was reported by 56%. Professionals consulted for information on cannabis included recreational cannabis store agents (36%), physicians (29%), and others. Overall, significant differences were observed for many of the comparisons according to sex, age, and the type of cannabis use. Conclusions Many conditions are self-medicated with cannabis. The use of high doses of cannabis, smoking as a preferred method of use, and concurrent use of other medications may pose some risks to individuals. Addressing the reported barriers to medical access to cannabis is urgently needed.

Objective Little is known about self-medication with cannabis post-recreational cannabis legalization in Canada. We aimed to establish a detailed portrait of self-medication with cannabis among adults in Quebec. Methods We conducted an online survey from November 2020 to January 2021 among individuals aged ≥ 21 years, who endorsed using cannabis bought in legal recreational cannabis stores to self-medicate a health condition. Data were analysed using descriptive statistics and stratified according to sex, age and the type of cannabis use (exclusively medical versus medical and recreational use). Results 489 participants were included. Median age was 34 years, and 48% were women. About 25% reported an exclusive medical use of cannabis. Treated conditions included anxiety (70%), insomnia (56%), pain (53%), depression (37%), and many other. Reasons for not consulting in cannabis clinics included lack of information (52%), complexity of the process (39%), accessibility of cannabis clinics (23%) and other.

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