| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| N | NERVOUS SYSTEM | 神经系统 |
| N01 | ANESTHETICS | 麻醉药 |
| N01A | ANESTHETICS, GENERAL | 全身麻醉药 |
| N01AF | Barbiturates, plain | 巴比妥类 |
| N01AF01 | methohexital | 美索比妥（甲己炔巴比妥） |
| N01AF02 | hexobarbital | 海索比妥 |
| N01AF03 | thiopental | 硫喷妥 |