| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| N | NERVOUS SYSTEM | 神经系统 |
| N04 | ANTI-PARKINSON DRUGS | 抗震颤麻痹药 |
| N04A | ANTICHOLINERGIC AGENTS | 抗胆碱能药 |
| N04AB | Ethers chemically close to antihistamines | 化学与抗组胺药近似的醚类 |
| N04AB01 | etanautine | 乙苯海拉明 |
| N04AB02 | orphenadrine (chloride) | 盐酸奥芬那君 0.2 g 口服 |
| N04AB02 | orphenadrine (chloride) | 盐酸奥芬那君 0.2 g 注射 |