The effect of the drug Delcid 7.5 ® on the clinical, hematological and biochemical parameters of rabbits of the New Zealand breed, 6 months of age, when used in doses of 2 ml or 4 ml. Three times with a cutaneous application along the vertebral column from the head to the tail. The conducted studies allow us to conclude that after applying the drug in these doses for 3 days, there were no external signs of intoxication in rabbits. All the animals of the experimental groups were active. The reaction to external stimuli is preserved. Hematological parameters of peripheral blood (number of erythrocytes, leukocytes, hemoglobin, color index, the average hemoglobin content of PG in erythrocytes, mean corpuscular volume, the exponent of anisocytosis of red blood cells, etc.) of the experimental group after treatment in 5, 15, 25 days had no significant differences from those in the control group, this suggests that the applied drug to the skin along the spine from the withers to the rump at a dose of 2 and 4 ml has no Toxicological effect on peripheral blood. The leukogram of the peripheral blood of rabbits when using the drug did not differ from the control parameters. The analysis of biochemical parameters (activity of aminotransferase, alkaline phosphatase, lactate dehydrogenase, creatinine, urea, glucose, total protein, bilirubin, etc.) of the blood of the experimental groups when applying the drug Delcid 7.5 ® along the spinal column at the maximum therapeutic dose did not reveal statistically significant differences from the control, which indicates that the drug does not have a genotoxic effect, does not interfere with the kidneys and metabolism in the body of rabbits. The results of the conducted studies show that the insecticide-acaricide drug Delcid 7.5® for veterinary use, developed by NVC Agrovetzashchita LLC, is safe for rabbits, and therefore it can be recommended for studying the effectiveness of acarosis in rabbits and other animal species.