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 | A11CC06 | Calcifediol |
| Active Ingredient | Description | |
|---|---|---|
| Calcidiol |
Vitamin D3 must undergo a two-step metabolic process to be active; the first step occurs in the microsomal fraction of the liver where Vitamin D is hydroxylated at position 25 (25-hydroxycholecalciferol or calcifediol); the second step takes place in the kidney where 1,25-dihydroxycholecalciferol or calcitriol is formed due to the activity of enzyme 25-hydroxycholecalciferol 1-hydroxylase. Vitamin D increases absorption of calcium and phosphorus in the intestine and improves normal bone formation and mineralization. |
Note the following: The list of brand names is continuously updated, and thus does not include the total of products circulating worldwide.
