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 | C03 | Diuretics | |
| 3 | C03E | Diuretics and potassium-sparing agents in combination | |
| 4 | C03EA | Low-ceiling diuretics and potassium-sparing agents | |
| 5 | C03EA03 | Epitizide and potassium-sparing agents |
