Gastrointestinal Tract Metabolism (A)

Blood and Blood Forming Organs (B)

Cardiovascular System (C)

Calcium Channel Blocker

Cardiac Glycosides

Skin (D)

Genitourinary System (G)

Endocrine System (H)

Infections and Infestations (J, P, QI)

Antiviral Drugs

Malignant Disease (L01–L02)

Immune Disease (L03–L04)

Muscles, Bones, and Joints (M)

Brain and Nervous System (N)

Respiratory System (R)

Sensory organs (S)

other ATC (V)