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