With marijuana’s legalization for both medical and recreational use across North America, cases of cannabis poisoning are increasing. A recent study conducted by researchers at the University of Sydney found that rates of poisoning have gone up significantly with the spread of legalization. The rise in poisoning risk is especially pronounced in children, who are vulnerable to the effects of ingesting too much marijuana. The study suggests that the increase in poisoning cases could be attributed to the growing perception that marijuana is safe, as well as changes in patterns of use, such as the shift towards edibles that are attractive to young people. The researchers recommend implementing precautions such as halting the production and advertising of marijuana products that are designed to appeal to young users.
The Rise of Cannabis Poisonings
Causes and Effects of Cannabis Poisoning
The legalization of cannabis for both medical and recreational use has become increasingly common in North America. However, this shift has also resulted in a rise in cases of cannabis poisoning. Cannabis poisoning occurs when an individual ingests too much marijuana in one go, leading to various symptoms such as sleepiness, dizziness, high blood pressure, palpitations, lethargy, a fast heart rate, nausea, vomiting, agitation, and irritability. Children are particularly vulnerable, and in extreme cases, cannabis poisoning can even lead to comas.

Rise in Poisoning Rates After Legalization
A systematic review of published studies conducted by researchers from the University of Sydney revealed that the rates of cannabis poisoning have generally increased after the legalization or decriminalization of marijuana. The extent of this increase varied between studies, but on average, the risk of poisoning went up three to four times. The rise in poisoning cases among children was even more dramatic. The review included 30 studies, with the majority focusing on the United States (23 studies) and Canada (six studies). Only one study examined a jurisdiction outside of North America: Thailand. Nearly two-thirds of the studies (19) specifically focused on the risk of marijuana poisoning among children. Out of the 24 studies that examined the impact of legalization, all indicated an increase in the risk of poisoning.
Impact on Children
Children are at a higher risk of cannabis poisoning due to their smaller body size and limited ability to metabolize and eliminate the substance from their system. The rise in poisoning cases among children is particularly concerning. One of the main factors contributing to this increase is the growing popularity of edible cannabis products. Edibles are often made to look and taste like regular sweets, such as lollipops, making them highly attractive to young children. The packaging and marketing of these products also play a significant role in their appeal to young users. Government regulations and preventative measures are needed to address this issue and protect children from accidental poisonings.
Research Findings
Systematic Review of Published Studies
The systematic review conducted by the University of Sydney researchers examined 30 published studies on the impact of cannabis legalization on poisoning rates. The majority of studies were conducted in North America, making it challenging to draw conclusions about the global impact. However, the review provided valuable insights into the association between legalization and the increased risk of poisoning.
Variability in Poisoning Risk
The review found that the extent to which poisoning risk increased varied across studies, particularly when differentiating between recreational and medical marijuana use. Overall, poisoning risk was consistently higher when legalization involved medical marijuana use. The researchers hypothesized that the rising perception of marijuana as safe, coupled with changes in patterns of use, such as the increasing popularity of edibles, contributed to the overall increase in poisoning cases.
Focus on North America
The majority of the studies included in the review focused on North America, with only one study examining a jurisdiction outside of the region. Therefore, it is crucial to consider the cultural context and specific policies of each country when interpreting the findings. The impact of legalization on poisoning rates may differ in other countries with different regulatory frameworks and cultural attitudes towards marijuana.
Factors Contributing to Cannabis Poisonings
Increased Perception of Safety
The growing perception that marijuana is safe due to its legalization has contributed to the increase in poisoning cases. Many people, including parents, may underestimate the potential risks associated with marijuana use, especially for children. The normalization of marijuana use and the belief that it is a harmless substance have led to a false sense of security, leading to unintentional poisonings.
Changes in Patterns of Use
The shift towards using edible cannabis products instead of smoking marijuana has also played a significant role in the rise of poisoning cases. Edibles, such as candies and snacks infused with marijuana, are often made to resemble regular food items, making them appealing to both adults and children. The delayed onset and varying potency of edibles can increase the risk of users consuming more than intended, leading to poisoning.
Marketing and Packaging of Edibles
The marketing and packaging of edible cannabis products contribute to their attractiveness to young users. Companies often design these products to resemble regular sweets, with colorful packaging and appealing shapes. This marketing strategy can mistakenly entice children to consume the products, leading to accidental poisonings. Government regulations should be implemented to restrict the production and advertising of marijuana products that specifically target young users.
Preventative Measures

Government Regulations
Government regulations are crucial in addressing the rise in cannabis poisonings. These regulations should focus on product safety, packaging, and marketing restrictions. Packaging requirements, such as child-resistant containers, can help prevent accidental consumption by young children. Additionally, clear labeling indicating the presence of cannabis and proper dosing instructions can help educate consumers and reduce the risk of unintentional poisonings.
Educating Consumers
Educating consumers about the potential risks associated with marijuana use is essential in preventing poisonings. Public health campaigns should emphasize responsible use, proper storage of cannabis products, and the potential dangers of exposure to children. By providing accurate information, consumers can make informed decisions and take appropriate precautions to ensure their safety and the safety of those around them.
Child-Resistant Packaging
Child-resistant packaging is a critical preventative measure to safeguard children from accidental cannabis poisonings. Packaging that is difficult for young children to open or access can significantly reduce the risk of unintentional ingestion. Manufacturers and regulatory bodies should prioritize child-resistant packaging requirements for all cannabis products, especially edibles, which are particularly attractive to young children.
Perspectives on Cannabis Legalization

Advocacy for Sensible Regulations
Advocates for sensible regulations argue that the imposition of specific guidelines and safeguards can help mitigate the health risks associated with cannabis use. Implementing clear regulations on product safety, packaging, and marketing can ensure that consumers are well-informed and protected. Sensible regulations can strike a balance between allowing access to marijuana products and minimizing the potential harms, such as accidental poisonings.
Overdramatizing Health Risks
Some critics argue that the constant reference to cannabis-related events as “poisonings” may be sensationalized. They emphasize that many of these incidents are due to inadvertent exposure or over-consumption. While it is important to recognize and address the potential risks, it is equally important to avoid overstating the severity of the health risks associated with marijuana use. The focus should be on public education and responsible use, rather than instilling fear.
Comparisons to Other Legal Products
Advocates for cannabis legalization often compare the health risks associated with marijuana use to those of other legal products, such as alcohol or laundry detergent pods. They point out that the overwhelming majority of inadvertent or overindulgent cannabis exposures result in nominal health interventions. By highlighting the potential dangers of other commonly used legal products, proponents of legalization argue that marijuana should be treated with a similar perspective, emphasizing responsible use and risk reduction.

Conclusion
The rise of cannabis poisonings after legalization highlights the importance of balancing the benefits and risks associated with marijuana use. While legalization has provided access to cannabis for medical and recreational purposes, it has also resulted in an increase in poisonings, particularly among children. Government regulations, consumer education, and child-resistant packaging are essential preventative measures to address this growing issue. Ongoing research and monitoring are necessary to evaluate the effectiveness of these measures and ensure the safe use of cannabis. By understanding the causes and effects of cannabis poisonings, society can strive for responsible and informed marijuana use.