text: Results: The administration of << prallethrin >> 1.6% w/w created significant increased changes in the levels of total WBC, lymphocytes, RBC, [[ hemoglobin ]], packed cell volume, platelets, mean corpuscular volume, and mean corpuscular hemoglobin in rats after 24, 48, and 72 h of continuous inhalation; however, there was a significant reduction in neutrophils at transient reduction in the monocytes after 24 and 48 h to return to normal after 72 h.