Recent Canadian studies have revealed significant health risks associated with cannabis use disorder, indicating a heightened risk of death and increased instances of psychosis. The studies, which are the largest to date on this topic, found that individuals diagnosed with cannabis use disorder—characterized by an inability to cease cannabis use despite its negative effects—experienced mortality rates nearly three times higher than those without the disorder over a five-year period.
Key findings from the research indicated that patients with cannabis use disorder were ten times more likely to die by suicide compared to the general population. Additionally, these individuals faced increased risks of death from trauma, drug overdoses, and lung cancer. Notably, the severity of cannabis use disorder was assessed to be roughly half as dangerous as opioid addiction and slightly less severe than alcohol use disorder.
Another report highlighted a correlation between cannabis use disorder and a rise in cases of schizophrenia and psychosis in Canada since the legalization of the drug. Experts, including Dr. Laura Bierut from Washington University, emphasized that the potency of modern cannabis strains significantly exceeds that of earlier decades, raising concerns over public health implications similar to those associated with alcohol consumption.
The studies suggest that approximately 30% of cannabis users may develop cannabis use disorder, although many individuals use cannabis recreationally without experiencing adverse effects. These findings contribute to an ongoing dialogue regarding the health impacts of cannabis use in the context of its legalization and normalization in society.
