Health Risks of Cannabis Edibles Highlighted by Experts

Introduction to Cannabis and Its Components

Cannabis, derived from the leaves and flowers of cannabis plants, contains over 100 chemical compounds known as cannabinoids. The two primary active ingredients are tetrahydrocannabinol (THC) and cannabidiol (CBD). The effects of cannabis on the brain and body include feelings of intoxication, drowsiness, and impaired concentration and memory, primarily attributed to THC. In contrast, CBD is associated with anti-anxiety, analgesic, and anti-inflammatory effects.

Uses of Cannabis

Cannabis is utilized both recreationally and medicinally, with some evidence supporting its benefits for conditions like multiple sclerosis, chronic pain, and nausea from cancer treatments.

Legalization of Cannabis Edibles in Canada

Regulatory Background

Cannabis must be heated to activate its cannabinoids, as the raw plant does not produce effects. Users typically consume cannabis through smoking, vaping, or ingesting edibles—food, drinks, or oils infused with cannabis. The regulation of cannabis use varies globally; in Canada, medicinal cannabis was legalized in July 2001 and recreational use followed in June 2018. The controlled production and sale of cannabis edibles became legal in October 2019, but this form of cannabis has raised specific health concerns, as noted by experts in the Canadian Medical Association Journal.

Health Risks Associated with Cannabis Edibles

Popularity and Consumption Patterns

Cannabis edibles have gained significant popularity in Canada. According to the National Cannabis Survey in 2019, 27% of individuals who used cannabis in the prior three months reported consuming edibles, often through homemade or illegal sources. Although edibles are often perceived as safer than smoking due to the absence of smoke inhalation, they carry distinct health risks.

Delayed Onset of Effects

One major concern is the delayed onset of effects from cannabis edibles compared to smoking. Users may feel the effects of smoked cannabis within minutes, whereas edibles can take up to four hours to manifest, potentially lasting up to eight hours. This delay increases the risk of overdose due to overconsumption and prolongs impairment.

Varying Responses and Accidental Ingestion

Responses to cannabis edibles can vary significantly among individuals, which heightens the risk of overdose, particularly for new users unfamiliar with these products. Additionally, the appealing appearance of some edibles can lead to accidental ingestion by children or pets. Following the legalization of cannabis edibles in Colorado, there was a notable 70% increase in accidental exposure cases among children from 2013 to 2017.

Risks for Specific Populations

Older adults and young adults may face unique risks associated with cannabis edibles. Many older adults use cannabis to manage chronic health issues, but it has been linked to mental impairment, increased risk of falls, heart rhythm disturbances, and adverse interactions with other medications. A recent survey revealed that young adults often mistakenly believe cannabis edibles can improve mood, anxiety, and sleep, despite evidence indicating potential impairments to brain development and mental health.

Regulatory Measures Addressing Health Risks

New Regulations for Edibles

Recent regulations aimed at cannabis edibles have introduced dosage limitations and requirements for standardized dosing information. The sale of cannabis edibles is restricted from combining with other psychoactive substances, such as nicotine or alcohol. Additionally, edibles must be packaged in plain, child-resistant containers and include standardized symbols and health warnings. There are strict controls on marketing claims and manufacturing processes.

Role of Health Professionals

Health professionals are encouraged to educate the public about the potential health risks associated with cannabis edibles. Experts Dr. Jasleen Grewal and Dr. Lawrence Loh from the University of Toronto recommend that physicians routinely inquire about patients’ use of cannabis edibles to provide adequate counseling on child safety, risks of overconsumption, and possible interactions with other substances.

Driving and Consumption Advisory

Physicians should strongly advise against driving after consuming cannabis edibles and discourage the use of illicit or homemade products, which may vary greatly in THC content and could be contaminated with harmful substances. The authors emphasize the importance of population monitoring to assess the effects of legalized cannabis edibles.

References

Grewal JK, Loh LC. Health considerations of the legalization of cannabis edibles. CMAJ. January 6, 2020 192(1)E1-E2. Doi: https://doi.org/10.1503/cmaj.191217
Canadian Medical Association Journal. Press release 6 Jan 2020. Cannabis edibles present novel health risks. https://www.eurekalert.org/pub_releases/2020-01/cmaj-cep123019.php
Canadian Public Health Association Resources and Services. Cannabasics https://www.cpha.ca/cannabasics