Compound |
Receptor types |
||
| m | k | s | |
| Morphine | Ag | Ag | -- |
| Naloxone | Ant | Ant | mixed |
| Pentazocine | Ant | Ag | Ag |
| Butorphanol | -- | Ag | Ag |
| Nalbuphine | Ant | pAg | mixed |
| Nalorphine | Ant | pAg | mixed |
| Buprenorphine | pAg | ? | -- |
Ag = agonist; Ant = antagonist; pAg = partial agonist: -- = nosignificant action.