Symptoms may also include incoordination, tremors, convulsions, paralysis, respiratory failure, and death. Human response to these two different types of pyrethroids has not yet been evaluated. Recovery from serious poisoning in mammals is fairly rapid. On broken skin, pyrethrum produces irritation and sensitization, which is further aggravated by sun exposure. However, humans can absorb pyrethrum more quickly through the lungs during respiration.
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.