Amitraz is an acaricide and insecticide indicated for the treatment of generalized demodicosis in dogs and for the control of ticks and mites in cattle and sheep. There is little information available in the human literature about the toxicology of the product. In this study, the clinical and laboratory features of amitraz poisoning in 11 children are presented. The age range of the patients was 2-1/2 to 6 years. Accidental ingestion of an improperly stored liquid pesticide was determined in all patients. Unconsciousness (100%), drowsiness (100%), and myosis (84%) were the most common abnormal signs; 45%, 27%, and 18% of patients had bradycardia, respiratory insufficiency, and hypotension, respectively. All of the patients were treated with atropine, gastric lavage, activated charcoal, and supportive care. Although the patients had a prompt response to therapy, three patients required multiple doses of atropine during a 24-h period. This study revealed that clinical poisoning by oral route emerged within 30-90 min and that central nervous system (CNS) depression, which is the most important sign, resolved within 8-1/2-14 h. All cases were discharged.
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