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 | A | Alimentary tract and metabolism | |
| 2 | A11 | Vitamins | |
| 3 | A11C | Vitamin A and D, incl. combinations of the two | |
| 4 | A11CC | Vitamin D and analogues | |
| 5 | A11CC20 | Combinations |
Note the following: The list of brand names is continuously updated, and thus does not include the total of products circulating worldwide.
