Figure 2.

Distribution of serious (closed bars) and not serious (open bars) cases of actual drug-drug interactions in different Anatomical-Therapeutic-Chemical (ATC) drug classification groups. ATC groups: A – Alimentary Tract and Metabolism; B – Blood and Blood Forming Organs; C – Cardiovascular System Drugs; G – Genito Urinary System and Sex Hormones; H – Systemic Hormonal Preparations, Excluding Sex Hormones and Insulins, Genito Urinary System and Sex Hormones; J – Anti-infectives for Systemic Use; L – Antineoplastic and Immunomodulating Medications; M – Musculo-Skeletal System; N – Nervous System; V – Various.