Recreational Cannabis
Tools to help inform and guide your conversations with patients about recreational cannabis.
Recreational Cannabis
Tools to help inform and guide your conversations with patients about recreational cannabis.

Harm Reduction

Lower-Risk Cannabis Use Guidelines

A summary of ten recommendations for lower-risk cannabis use:

  1. Abstinence is the most effective way to avoid cannabis use-related health risks
  2. Cannabis use should not be started early in life (i.e. definitively avoid use before 16 years old)
  3. Choose low-potency tetrahydrocannabinol (THC) or balanced THC-to-cannabidiol (CBD)-ratio cannabis products
  4. Do not use synthetic cannabinoids
  5. Avoid combusted cannabis inhalation; give preference to non-smoking use methods
  6. Avoid deep or other risky inhalation practices
  7. Avoid high-frequency (e.g., daily or near-daily) cannabis use
  8. Do not drive while impaired by cannabis
  9. Populations at higher risk for cannabis use-related health problems should avoid use altogether
  10. Avoid combining previously mentioned risk behaviors (e.g., early initiation and high-frequency use).

Full paper is available here:

Fischer B, Russell C, Sabioni P, van den Brink W, Le Foll B, Hall W, et al. Lower-Risk Cannabis Use Guidelines: A Comprehensive Update of Evidence and Recommendations. Public Health Policy. 2017;107(8):e1-e12.


Special Risk Populations

Cannabis may not be suitable for all patients. Several publications from Health Canada, the CFPC, and others, have identified a set of special risk populations in the context of both medical and recreational cannabis use:

  • Women who are pregnant, breastfeeding, or planning to become pregnant
  • Children and youth under 25 years
  • Individuals with current, past, or family history of psychosis
  • Individuals with current, past, or family history of substance use disorder

NOTE: Risks to Mental Health
Growing evidence also shows that cannabis use increases the risk of psychosis and psychotic disorders for the general population (not just for those with a history of, or predisposition to psychosis or psychotic disorders).

For a detailed overview of the risks of cannabis use in the populations listed above and links to position statements from the relevant medical societies, visit our Cannabis and Special Risk Populations page

Cannabis and Driving

Information to help you understand the new laws around cannabis-impaired driving, discuss the risks with patients, and understand your responsibilities.

Cannabis-Related Healthcare Visits

Marijuana Decriminalization: The Colorado Emergency Department Experience

Toxicologist and Emergency Medicine physician Dr. Kennon Heard draws from the experience of emergency departments in Colorado to comment on the factors that have contributed to the rise of cannabis-related visits to the ER.

He addresses the pharmacology of cannabis and offers practical advice to help Ontario’s Emergency Medicine physicians better prepare for and manage the following cannabis-related presentations:

  • Accidental pediatric ingestion
  • Cyclic vomiting
  • Cannabis intoxication
  • Burns
  • Synthetic cannabinoid overdoses

Video Lecture

PDF Reference Document

Key Tools

Organization Title Description

Canadian Public Health Association

Cannabasics - Information Package

Fact sheets for health and social service providers that give an overview of cannabis plants and products, methods of consumption, and information to better understand harm reduction.

Centre for Effective Practice

Non-Medical Cannabis Resource

Printable resource designed to help providers discuss non-medical cannabis use with their patients in a safe and non-judgmental environment.

Centre for Addiction and Mental Health (CAMH)

Canada’s Lower-Risk Cannabis Use Guidelines

Handout for healthcare professionals summarizing the ten recommendations from the Lower Risk Cannabis Use Guidelines.

Ontario Medical Association

Talking to Patients About Recreational Cannabis

Overview of health risks associated with recreational cannabis use and considerations to guide a conversation with patients about recreational cannabis.

Ontario Medical Association

What You Should Know About Recreational Cannabis - Infographic

Infographic that reviews the basics of cannabis and the risks and harms associated with cannabis use.

Updated: May 27, 2019