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 | G | Genito urinary system and sex hormones | |
| 2 | G03 | Sex hormones and modulators of the genital system | |
| 3 | G03A | Hormonal contraceptives for systemic use | |
| 4 | G03AA | Progestogens and estrogens, fixed combinations | |
| 5 | G03AA04 | Megestrol and ethinylestradiol |
