The World Health Organization's ATC classification organizes medical drugs based on therapeutic properties, chemical composition, and anatomy. It helps make essential medicines readily available globally and is widely used in the pharmaceutical industry.
| Level | Code | Title | |
|---|---|---|---|
| 1 | R | Respiratory system | |
| 2 | R07 | Other respiratory system products | |
| 3 | R07A | Other respiratory system products | |
| 4 | R07AA | Lung surfactants | |
| 5 | R07AA30 | Combinations |
