Pyrethroid
•Pyrethroid extracted from plant Chrysanthemum cinerariaefolium และ C. coccineum
•Example: pyrethrin, cinerin, jasmolin
•Normally use 0.1-0.6% concentration
•Easy absorb via GI and skin
•Pyrethroid can metabolized by human enzyme carboxyl esterase (not toxic to mammal)
•Mechanism toxicity: inhibit Na and K ion channals