R: Respiratory system
| Level 2 code | Description |
|---|---|
| R01 | Nasal preparations |
| R02 | Throat preparations |
| R03 | Drugs for obstructive airway diseases |
| R05 | Cough and cold preparations |
| R06 | Antihistamines for systemic use |
| R07 | Other respiratory system products |
February 8, 2026
| Level 2 code | Description |
|---|---|
| R01 | Nasal preparations |
| R02 | Throat preparations |
| R03 | Drugs for obstructive airway diseases |
| R05 | Cough and cold preparations |
| R06 | Antihistamines for systemic use |
| R07 | Other respiratory system products |