| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| N | NERVOUS SYSTEM | 神经系统 |
| N02 | ANALGESICS | 镇痛药 |
| N02C | ANTIMIGRAINE PREPARATIONS | 抗偏头痛药 |
| N02CA | Ergot alkaloids | 麦角生物碱类 |
| N02CA01 | dihydroergotamine | 双氢麦角胺 1 mg 鼻腔给药 |
| N02CA01 | dihydroergotamine | 双氢麦角胺 4 mg 口服 |
| N02CA01 | dihydroergotamine | 双氢麦角胺 4 mg 注射 |