| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| N | NERVOUS SYSTEM | 神经系统 |
| N02 | ANALGESICS | 镇痛药 |
| N02A | OPIOIDS | 阿片碱类 |
| N02AA | Natural opium alkaloids | 天然阿片生物碱类 |
| N02AA03 | hydromorphone | 二氢吗啡酮 4 mg 直肠给药 |
| N02AA03 | hydromorphone | 二氢吗啡酮 4 mg 注射 |
| N02AA03 | hydromorphone | 二氢吗啡酮 20 mg 口服 |