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Table 1 Opioids involved in overdose deaths in Canada [19]

From: Naloxone interventions in opioid overdoses: a systematic review protocol

Opioids involved in overdose deaths in Canada
Fentanyl-related opioids • Fentanyl
• Carfentanil
• Norfenanyl
• Acetylfentanyl
• Butyryfentanyl
• Furanyl-fentanyl
• 3-methylfentanyl
• Despropinyl-fentanyl
Non-fentanyl related opioids • Heroin
• Codeine
• U-47700
• Tramadol
• Morphine
• Tapentadol
• Oxycodone
• Loperamide
• Meperidine
• Methadone
• Hydrocodone
• Normeperidine
• Dihydrocodeine
• Hydromorphone
• Monoacetylmorphine
• Buprenorphine metabolites