In the context of the opioid crisis in Canada, the following sites contain useful information helping understanding how opioid containing drugs should be used: 

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• https://www.quebec.ca/en/health/advice-and-prevention/alcohol-drugs-gambling/risks-of-opioid-use/?gclid=EAIaIQobChMIm7_P2pqr5AIVUuDICh1P6AwwEAAYASAAEgJi8_D_BwE

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• https://www.canada.ca/en/health-canada/services/substance-use/problematic-prescription-drug-use/opioids/get-the-facts.html

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• Product monographs for opioid containing products:

  • Doloral 1​ (morphine syrup)

  • Doloral 5 (morphine syrup)

  • Codeine phosphate syrup 5 mg/mL

  • Linctus codeinae

• Important Safety Information on Prescription
  Cough and Cold Products Containing Opioids and the Risk of Opioid Use
  Disorder in Children and Adolescents​

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