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. 2001 Dec;52(6):693–698. doi: 10.1046/j.1365-2125.2001.01502.x

Table 2.

Total daily oral morphine equivalent conversion table.

Drug Dose × conversion factor
Pethidine (oral) ×0.125
Pethidine (i.v.) ×0.4
Methadone ×1.5
Oxycodone ×1.5
Buprenorphine ×50
Codeine ×0.16
Dextropropoxyphene ×0.1
Morphine (i.v.) ×3
Morphine (oral) ×1