Effectiveness of Combination of Atropine and Glycopyyrolate in the Treatment of Mixed Organophosphorus Poisoning Thunga G et al. - Pyrethroid insecticides are widely used, but there have been relatively few reports of systemic poisoning. Pyrethrum is regarded as the safest of the insecticides because of its high selectivity and toxicity for the insect nervous system and minimal dermal absorption. These reports have, however, shown that pharmacotherapy is difficult and that the duration of poisoning can be unexpectedly long. [more...]