A30-E Risks of Cannabis

Being high while driving:

Cannabis use slows your reaction time and your decision making skills. It also can make it harder to judge distances or time. Driving at a slower speed while high does not make it safer for you, for those in the vehicle and others on the road. Cannabis use increases the risk of a collision. When you use cannabis and alcohol together, it is even more dangerous.

Cannabis impairs your ability to operate a motor vehicle safely. Never drive while impaired!

Drug-impaired driving by cannabis use is a criminal offense in Canada.

Making decisions about cannabis use as a parent:
When making a decision about substance use, know the potential benefits and risks to your health, your relationships, your work or your finances.

As parents, there are many reasons to be cautious about your choices.

You are encouraged to keep learning about the effects of cannabis as new information becomes available. Discuss your concerns and questions
with your health care providers.

Who to call for information or help


Have a conversation with your health care provider.

If your health care provider wants to know more, here are resources you can provide:


Best Start by Health Nexus thanks the Centre of Excellence for Women’s Health for compiling the research for this resource. Thanks also to those who provided input during the development of this resource:

  • Andra Smith, Ph.D., University of Ottawa
  • Diane Buhler, Parent Action on Drugs
  • Alice Ordean, Medical Director, Toronto Centre for Substance Use in Pregnancy (T-CUP), St. Joseph’s Health Centre, Toronto and Associate Professor, Department of
  • Family and Community Medicine, University of Toronto
  • Nadia Minian, Centre for Addiction and Mental Health (CAMH)
  • Joanne Brown, Parent Action on Drugs
  • Judy Stanley, Public Health Nurse, Peterborough Public Health
  • Mary Mueller, Public Health Nurse, Region of Waterloo Public Health and Emergency Services
  • Rosa Dragonetti, Centre for Addiction and Mental Health (CAMH)
  • Shelley Charbonneau, Public Health Nurse, Chatham-Kent Public Health Unit
  • Sonali Sagare, Director, Jean Tweed Centre

Best Start by Health Nexus Lead: Marie Brisson

We would also like to thank the parents who provided input for this booklet.

This document has been prepared with funds provided by the Government of Ontario. The information herein reflects the views of the authors and does not necessarily reflect the views of the Government of Ontario. Best Start by Health Nexus and the Government of Ontario do not necessarily endorse the resources and programs cited throughout this guide.

Citation: Best Start by Health Nexus (2019). Risks of Cannabis on Fertility, Pregnancy, Breastfeeding and Parenting.
Toronto, Ontario, Canada: author