Response appears to depend on the pyrethrum compound used. Patch tests for allergic reaction are an important tool in determining an individuals sensitivity to these compounds. Many of the natural and synthetic compounds can produce skin irritation, itching, pricking sensations and local burning sensations. Reproductive Effects Rabbits that received pyrethrins orally at high doses during the sensitive period of pregnancy had normal litters. Overall, pyrethrins appear to have low reproductive toxicity.
More information is needed.
No information was found. No carcinogenic status has been established for pyrethrins or pyrethroids. In mammals, tissue storage has not been recorded. At high doses, pyrethrum can be damaging to the central nervous system and the immune system. When the immune system is attacked by pyrethrum, allergies can be worsened.