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Anatomical Therapeutic Chemical Classification System (ATC)

In the Anatomical Therapeutic Chemical (ATC) classification system, the active substances are divided into different groups according to the organ or system on which they act and their therapeutic, pharmacological and chemical properties. Drugs are classified in groups at five different levels.

The system has fourteen main anatomical/pharmacological groups or 1st levels.

ATC Groups

Group
Title
A
Alimentary tract and metabolism
B
Blood and blood forming organs
C
Cardiovascular system
D
Dermatologicals
G
Genito urinary system and sex hormones
H
Systemic hormonal preparations, excl. Sex hormones and insulins
J
Antiinfectives for systemic use
L
Antineoplastic and immunomodulating agents
M
Musculo-skeletal system
N
Nervous system
P
Antiparasitic products, insecticides and repellents
R
Respiratory system
S
Sensory organs
V
Various