Metabolism of opioid agonists.
| Drug . | Active metabolite . |
|---|---|
| Abbreviations: M6G, morphine-6-glucoronide; M3G, morphine-3-glucoronide | |
| Codeine | Morphine |
| Hydrocodone | Hydromorphone |
| Meperidine | Normeperidine |
| Oxycodone | Oxymorphone |
| Morphine | M6G and M3G |
| Hydromorphone | None |
| Oxymorphone | None |
| Fentanyl | None |
| Drug . | Active metabolite . |
|---|---|
| Abbreviations: M6G, morphine-6-glucoronide; M3G, morphine-3-glucoronide | |
| Codeine | Morphine |
| Hydrocodone | Hydromorphone |
| Meperidine | Normeperidine |
| Oxycodone | Oxymorphone |
| Morphine | M6G and M3G |
| Hydromorphone | None |
| Oxymorphone | None |
| Fentanyl | None |