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Chemical classification of opioids.
| Classification and definition | Names/Brand names |
|---|---|
| Natural - Alkaloids contained in the resin of the opium poppy | Morphine |
| Codeine | |
| Thebaine | |
| Semi-Synthetic - Created from natural opiates | Hydrocodone—Vicodin |
| Hydomorphone—Dilaudid | |
| Oxycodone—Oxycontin | |
| Oxymorphone—Opana | |
| Diacetylmorphine—Heroin | |
| Synthetic - Man-made drugs that mimic the effect of opioids | Fentanyl—Duragesic |
| Methadone—Methadose | |
| Meperidine—Demerol | |
| Pentazocine—Talwin |
