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 | G03F | Progestogens and estrogens in combination | |
| 4 | G03FB | Progestogens and estrogens, sequential preparations | |
| 5 | G03FB02 | Lynestrenol and estrogen |
