Table 2

Morphine equivalent conversion factors

Opioid drug

Oral morphine equivalent dose


Buprenorphine

Multiplied by 60


Butorphanol

Multiplied by 7


Codeine

Divided by 12


Dihydrocodeine

Divided by 10


Fentanyl (patch)

Multiplied by 150


Hydrocodone

Multiplied by 1.5


Hydromorphone (oral)

Multiplied by 5


Hydromorphone (parenteral)

Multiplied by 10


Levorphanol

Multiplied by 6


Meperidine

Divided by 12


Methadone

Multiplied by 10


Morphine (parenteral)

Multiplied by 2


Oxycodone

Multiplied by 1.5


Oxymorphone

Multiplied by 10


Pentazocine

Divided by 4


Propoxyphene

Divided by 24


Tramadol

Divided by 5


Cepeda et al. BMC Palliative Care 2010 9:14   doi:10.1186/1472-684X-9-14

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