Cannabis health warning messages

Part 1: Health warning messages for cannabis products that are dried cannabis or cannabis accessories that contain dried cannabis

  • WARNING: Cannabis smoke is harmful. Harmful chemicals found in tobacco smoke are also found in cannabis smoke.
  • WARNING: Do not use if pregnant or breastfeeding. Using cannabis during pregnancy may harm your baby and result in low birth weight.
  • WARNING: Do not use if pregnant or breastfeeding. Substances found in cannabis are also found in the breast milk of mothers who use cannabis.
  • WARNING: Do not drive or operate machinery after using cannabis. More than 4,000 Canadians were injured and 75 died from driving after using cannabis (in 2012).
  • WARNING: Do not drive or operate machinery after using cannabis. After cannabis use, coordination, reaction time and ability to judge distances are impaired.
  • WARNING: Cannabis can be addictive. Up to half of people who use cannabis on a daily basis have work, social or health problems from using cannabis.
  • WARNING: Cannabis can be addictive. 1 in 11 people who use cannabis will become addicted.
  • WARNING: Cannabis can be addictive. Up to 1 in 2 people who use cannabis daily will become addicted.
  • WARNING: Regular use of cannabis can increase the risk of psychosis and schizophrenia. Higher THC content can increase the risk of psychosis and schizophrenia.
  • WARNING: Regular use of cannabis can increase the risk of psychosis and schizophrenia. Higher THC content can lower the age of onset of schizophrenia.
  • WARNING: Regular use of cannabis can increase the risk of psychosis and schizophrenia. Young people are especially at risk.
  • WARNING: Adolescents are at greater risk of harms from cannabis. Early and regular use increases the risk of psychosis and schizophrenia.
  • WARNING: Adolescents are at greater risk of harms from cannabis. Using cannabis as a teenager can increase your risk of becoming addicted.
  • WARNING: Adolescents are at greater risk of harms from cannabis. 1 in 6 people who start using cannabis in adolescence will become addicted.

Part 2: Health warning messages for all other cannabis products

  • WARNING: Do not use if pregnant or breastfeeding. Using cannabis during pregnancy may harm your baby and result in low birth weight.
  • WARNING: Do not use if pregnant or breastfeeding. Substances found in cannabis are also found in the breast milk of mothers who use cannabis.
  • WARNING: Do not drive or operate machinery after using cannabis. More than 4,000 Canadians were injured and 75 died from driving after using cannabis (in 2012).
  • WARNING: Do not drive or operate machinery after using cannabis. After cannabis use, coordination, reaction time and ability to judge distances are impaired.
  • WARNING: Cannabis can be addictive. Up to half of people who use cannabis on a daily basis have work, social or health problems from using cannabis.
  • WARNING: Cannabis can be addictive. 1 in 11 people who use cannabis will become addicted.
  • WARNING: Cannabis can be addictive. Up to 1 in 2 people who use cannabis daily will become addicted.
  • WARNING: Regular use of cannabis can increase the risk of psychosis and schizophrenia. Higher THC content can increase the risk of psychosis and schizophrenia.
  • WARNING: Regular use of cannabis can increase the risk of psychosis and schizophrenia. Higher THC content can lower the age of onset of schizophrenia.
  • WARNING: Regular use of cannabis can increase the risk of psychosis and schizophrenia. Young people are especially at risk.
  • WARNING: Adolescents are at greater risk of harms from cannabis. Early and regular use increases the risk of psychosis and schizophrenia.
  • WARNING: Adolescents are at greater risk of harms from cannabis. Using cannabis as a teenager can increase your risk of becoming addicted.
  • WARNING: Adolescents are at greater risk of harms from cannabis. 1 in 6 people who start using cannabis in adolescence will become addicted.

Updates for October 2019

This document is for informational purposes only and will not be in force until October 17, 2019.

Part 1: All of the cannabis health warning messages in this Part apply to cannabis products of all classes of cannabis listed in Schedule 4 to the Cannabis Act, with the exception of cannabis topicals.

  • WARNING: The smoke from cannabis is harmful. Toxic and carcinogenic chemicals found in tobacco smoke such as polyaromatic hydrocarbons, aromatic amines, and N-heterocyclics are also found in cannabis smoke.
  • WARNING: Do not use if pregnant or breastfeeding. Substances in cannabis are transferred from the mother to child and can harm your baby.
  • WARNING: Do not drive or operate heavy equipment after using cannabis. Cannabis can cause drowsiness and impair your ability to concentrate and make quick decisions.
  • WARNING: Frequent and prolonged use of cannabis containing THC can contribute to mental health problems over time. Daily or near-daily use increases the risk of dependence and may bring on or worsen disorders related to anxiety and depression.
  • WARNING: Adolescents and young adults are at greater risk of harms from cannabis. Daily or near-daily use over a prolonged period of time can harm brain development and function.
  • WARNING: The higher the THC content of a product, the more likely you are to experience adverse effects and greater levels of impairment. THC can cause anxiety and impair memory and concentration.
  • WARNING: It can take up to 4 hours to feel the full effects from eating or drinking cannabis. Consuming more within this time period can result in adverse effects that may require medical attention.
  • WARNING: The effects from eating or drinking cannabis can be long-lasting. The effects can last between 6 and 12 hours following use.

Part 2: The cannabis health warning message in this Part applies only to cannabis products that are cannabis topicals.

  • WARNING: Do not swallow or apply internally or to broken, irritated or itching skin. There may be health effects and risks associated with cannabis topicals that are not fully known or understood.
Report a problem or mistake on this page
Please select all that apply:

Thank you for your help!

You will not receive a reply. For enquiries, contact us.

Date modified: