Synonym(s)
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Insecticides obtained from chrysanthemum flowers(e.g. Chrysanthemum cinerariaefolium). See below Antiparasitosa. Chemically, they are optically active esters of chrysanthemum acid or pyrethric acid and the hydroxyketones pyrethronolone, cinerolone and jasmolone.
Used in human medicine against head lice, crabs, clothes lice and scabies mites. Pyrethrum extracts were formerly used to kill insects. See pyrethrum below.
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As contact insecticides, they are highly toxic to cold-blooded and warm animals such as insects, mites or worms. Pyrethrins act as a nerve and muscle poison. They are not toxic to humans because they are not absorbed.
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Due to high production costs, pyrethrins are usually replaced by their synthetic analogues, the pyrethroids.
Prof. Dr. med. Peter Altmeyer
Prof. Dr. med. Martina Bacharach-Buhles