This group comprises all hormonal preparations for systemic use, except:
- Insulins, see A10.
- Anabolic steroids, see A14.
- Catecholamines, see C01C and R03C.
- Sex hormones, see G03.
- Sex hormones used in treatment of neoplastic diseases, see L02.
- Metreleptin used for treatment of complications of leptin deficiency in patients with generalised lipodystrophy is classified in A16AA.

Drugs acting on calcium homeostasis are classified in this group.
Vitamin-D preparations, see A11CC.

Paricalcitol and doxercalciferol indicated for the prevention and treatment of secondary hyperparathyroidism are classified here.
Oral formulations of calcifediol, solely approved for treatment of renal secondary hyperparathyroidism are classified here, while all other pharmaceutical formulations of calcifediol are classified in A11CC06.