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 | C | Cardiovascular system | |
| 2 | C09 | Agents acting on the renin-angiotensin system | |
| 3 | C09D | Angiotensin II antagonists, combinations | |
| 4 | C09DB | Angiotensin II antagonists and calcium channel blockers | |
| 5 | C09DB09 |
