| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| B | BLOOD AND BLOOD FORMING ORGANS | 血液和造血器官 |
| B03 | ANTIANEMIC PREPARATIONS | 抗贫血药 |
| B03B | VITAMIN B12 AND FOLIC ACID | 维生素B12和叶酸 |
| B03BA | Vitamin B12 (cyanocobalamin and analogues) | 维生素B12（氰钴胺及其类似药物） |
| B03BA03 | hydroxocobalamin | 羟钴胺 20 mcg 注射 |