(HealthDay News) — A study published online Dec. 23 in JAMA Psychiatry suggests that medical cannabis laws (MCLs) are linked to higher rates of cannabis use disorder (CUD) and cannabis poisoning, while recreational cannabis laws (RCLs) are associated with an increase in cannabis poisoning.
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Jayani Jayawardhana, PhD, from the University of Kentucky's College of Public Health, and her team analyzed the impact of state-level cannabis laws on CUD and cannabis poisoning in a longitudinal study involving adults aged 18 to 64 years.
Data from January 2011 to December 2021 were reviewed across all 50 states and the District of Columbia, focusing on trends before and after implementing MCLs and RCLs.
The study included 110,256,536 participants. Researchers found notable increases in CUD and cannabis poisoning linked to MCLs, with 31.09 and 0.76 diagnoses per 100,000 enrollees per quarter, respectively. In states with RCLs, cannabis poisoning rose by 0.34 per 100,000 enrollees per quarter.
However, opening medical cannabis dispensaries or allowing home cultivation of medical cannabis did not show significant associations.
Female participants and those aged 35 to 44 years exhibited higher relative increases in CUD linked to MCLs compared to males and other age groups.
The authors highlighted that these findings could place additional demands on healthcare systems, stressing the importance of pairing cannabis laws with effective policies and treatments to address adverse health effects.
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