Synonym(s)
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Insecticides derived from Chrysanthemum flowers (e.g. Chrysanthemum cinerariaefolium). S.u. Antiparasitosa. Chemically these are optically active esters of chrysanthemum acid or pyrethric acid and the hydroxyketones pyrethronolone, cinerolone and jasmolone.
Use in human medicine against head lice, felt lice, clothes lice and itch mites. Pyrethrum extracts were formerly used for insect extermination. S.u. Pyrethrum.
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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