Parenteral to oral conversion ratios of common opioids

Parenteral to oral conversion ratios of common opioids

Drug

Oral to parenteral ratio

Oral Morphine: Parenteral Morphine 3:1
Oral Hydromorphone : Parenteral Hydromorphone 5:1
Oral Levorphanol : Parenteral Levorphanol 1:1
Oral Methadone : Parenteral Methadone 2:1

 

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