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Relative Potency of Opioids
| ANALGESIC | POTENCY RELATIVE TO MORPHINE | DURATION OF ACTION (HOURS) |
|---|---|---|
| Codeine Dihydrocodeine | 1/10 | 3-6 |
Pethidine 1/8 2-4 Tapentadol 1/3 4-6 Hydrocodone (not United Kingdom) 2/3 4-8 Oxycodone 1.5(2)c 3-4 Methadone 5-10d 8-12 Hydromorphone 4-5 (5-7.5)d 4-5 Buprenorphine (SL) 80 6-8 Buprenorphine (TD) 100 (75-115)c Formulation dependent (72-168) Fentanyl (TD) 100 (150)c 72