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If you are concerned about your own or someone else¡¯s use of cannabis, alcohol, or another drug, please contact Health Link at 811 (1-866-408-5465 for internet phone users) or the Addiction Helpline at 1-866-332-2322.

Cannabis Health Effects

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Cannabis Health Effects

How Does Cannabis Affect My Health?

Using cannabis can cause both short-term and long-term health effects.

Short-Term Cannabis Use Can:

  • Increase your heart rate and blood pressure
  • Make your eyes red/bloodshot, as the blood vessels expand
  • Cause you to feel drowsy, slow your reaction times, and decrease your coordination
  • Make it harder to focus, concentrate, remember, and make decisions
  • Cause dizziness, headaches, and vomiting
  • Affect your ability to drive or operate equipment
  • Change your mood and judgement

Using Cannabis Often (Daily or Near-Daily) Over a Long Period of Time (Months/Years) Can:

  • Cause harm to your lungs if inhaled (smoking or vaping). Cannabis smoke contains many of the same toxins found in tobacco smoke
  • Cause chronic bronchitis, wheezing, and phlegm
  • Trigger severe nausea and repeated vomiting (called Cannabis Hyperemesis Syndrome or CHS)
  • Reduce your attention span, and ability to learn and make decisions
  • Cause memory loss
  • Lead to addiction
  • Increase your risk of heart attack and stroke
  • Increase your risk for testicular cancer, which could lead to low sperm count and infertility

Cannabis & Mental Health

Using cannabis can:

  • Increase your risk for mental disorders like schizophrenia, especially if you have a family history
  • Worsen symptoms of bipolar disorder, depression, and anxiety
  • Increase your risk for thoughts of suicide and suicide attempts

Learn more about the .

All Forms of Cannabis Have Health Risks

The only way to completely avoid health risks related to cannabis is not to use it.

Cannabis & Your Medications

Cannabis can interact with other medicines you take, which could affect your health. If you choose to use cannabis for medical or non-medical purposes, talk to your health care provider.

Medications that interact with cannabis include:

  • ADHD medicine
  • Allergy medicine
  • Antibiotics and anti-fungal medicine
  • Anti-depressants/anti-anxiety medicine
  • Anti-seizure medicine
  • Blood thinners
  • Cold & flu medicine
  • Heart medicine
  • HIV/AIDS medicine
  • Pain medicine
  • Sleeping pills

More Information

  • - Government of Canada
  • - MyHealth.Âé¶¹Ó³»­
  • - First Nations Health Authority