Table 4.

Equianalgesia conversion factor

Opioid	Equianalgesia dosage of 10 mg oral morphine (mg)
Hydromorphone [18]	2.5
Oxycodone [18]	6.7
Propoxyphene [17]	0.74
Hydrocodone [18]	10
Tramadol [19]	100
Codeine [18]	67