Pyrethrins, known as pediculicides, are extracted from dried pyrethrum flowers (a member of the same genus as the chrysanthemum) and are used as an insecticide,especially to kill head and body lice in humans. They are frequently paired with piperonyl butoxide which makes the pyrethrins more effective. 1. Banlice Headlice Solutions - Information to help families and school communities beat the bugs and eliminate headlice. 2. MEDLINEplus: Pyrethrins and Piperonyl Butoxide - Features information about usage and precautions. 3. Rid lice - A parent's guide on eliminating head lice, and preventing their spread. 4. DrugDigest: Pyrethrin and Piperonyl Butoxide (RID) - FAQ for consumers in html format.

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