. 2018 Aug 14;6:e5405. doi: 10.7717/peerj.5405

Table 2. Drug classification according to the first level of ATC.

Anatomical groups	Frequency, n (%)
N: Nervous system	658 (24.3)
A: Alimentary tract and metabolism	569 (21.0)
B: Blood and blood forming organs	487 (18.0)
C: Cardiovascular system	396 (14.6)
J: Antiinfectives for systemic use	313 (11.6)
m: Musculo-skeletal system	84 (3.1)
R: Respiratory system	80 (3.0)
H: Systemic hormonal preparations, excl. sex hormones and insulins	56 (2.1)
D: Dermatologicals	26 (1.0)
V: Various	23 (0.9)
S: Sensory organs	10 (0.4)
P: Antiparasitic products, insecticides and repellents	2 (0.1)

Notes.

Abbreviations