The comparative effect of the combined drugs Feliferon and Azoksivet and the drug Globfel-4 for rhinotracheitis in felines on hematological parameters of white blood was studied. In our study on the treatment of viral rhinotracheitis, 16 cats were examined. During the experiment, all cats showed the following clinical signs: lethargy, fever, leakage from the eyes and nasal passages. The animals were kept in separate cages in accordance with the European Convention for the Protection of Vertebrates. The control group was given 1 ml subcutaneously, once a day every other day, with a course of 7 injections, immunoglobulin against rhinotracheitis, calicivirus and chlamydia - Globfel-4. The experimental group was treated with drugs Azoxivet intramuscularly in a course of 7 injections, once a day every other day, and Feliferon at a dose of 400,000 IU intramuscularly, once a day. The course of treatment was 7 days. Blood sampling was performed from the anterior saphenous vein of the forearm before and after therapy. The concentration of erythrocytes and hemoglobin was determined on an automatic hematology analyzer Mindray BC-2800. When treating cats with rhinotracheitis with Globfel-4, pronounced leukocytosis, absolute and relative lymphocytosis were noted. With the combined use of Azoxivet and Feliferon, these blood changes do not occur. When treating cats with rhinotracheitis with Globfel-4 or the combined use of Azoxivet and Feliferon, the absolute concentrations of monocytes and granulocytes increase within the physiological norm. The relative concentrations of these white blood phrases increase within the physiological norm only with the combined use of Azoxivet and Feliferon.