The book "Treatment of Internal Diseases in Conditions of Comorbidity," ed., Belyalova F.I., examines the clinical features of diagnosis and pharmacotherapy of pathology of internal organs in patients with comorbid diseases. Chronic and acute cardiovascular diseases, pathology of the respiratory system and digestive tract are described. Drugs that can affect the accompanying pathology are presented. For medical students, therapists, cardiologists, family doctors, gastroenterologists, pulmonologists.