| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| C | CARDIOVASCULAR SYSTEM | 心血管系统 |
| C02 | ANTIHYPERTENSIVES | 抗高血压药 |
| C02A | ANTIADRENERGIC AGENTS, CENTRALLY ACTING | 起中心作用的抗肾上腺素能药 |
| C02AB | Methyldopa | 甲基多巴类 |
| C02AB02 | methyldopa (racemic) | 甲基多巴（消旋） 2 g 口服 |