| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| R | RESPIRATORY SYSTEM | 呼吸系统 |
| R06 | ANTIHISTAMINES FOR SYSTEMIC USE | 系统用抗组胺药 |
| R06A | ANTIHISTAMINES FOR SYSTEMIC USE | 系统用抗组胺药 |
| R06AA | Aminoalkyl ethers | 氨基烷基醚类 |
| R06AB | Substituted alkylamines | 取代烷基胺 |
| R06AC | Substituted ethylene diamines | 取代的乙二胺 |
| R06AD | Phenothiazine derivatives | 吩噻嗪衍生物类 |
| R06AE | Piperazine derivatives | 哌嗪衍生物类 |
| R06AK | Combinations of antihistamines | 抗组胺药的复方 |
| R06AX | Other antihistamines for systemic use | 系统用其它抗组胺药 |