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 | D | Dermatologicals | |
| 2 | D05 | Antipsoriatics | |
| 3 | D05A | Antipsoriatics for topical use | |
| 4 | D05AD | Psoralens for topical use | |
| 5 | D05AD01 | Trioxysalen |
