Organophosphorus insecticides induce different clinical manifestations varying according to the different side groups attached to the phosphate, their rates of degradation, and their fat solubilities. In consequence of this variation, specific treatments are required for particular organophosphorus insecticides. We report a unusual case of intoxication with dimethyl organophosphorus insecticide in a 26-year-old woman. She manifested atypical and ultimately fatal symptoms including profound shock, refractory hyperglycemia, and hypothermia.