Pyrethrins/piperonyl butoxide is commonly used to treat tiny insects called lice that are found on the head, body, or pubic area (sometimes called crabs). Pyrethrins/piperonyl butoxide may also ...

This insecticide can help prevent some mosquito and tick bites. But you must use it properly. Permethrin-treated clothing—designed to kill or disable bugs upon contact—has been available to ...

Armitage, R., Bayliss, G. S., Gramshaw, J. W., Haslam, E., Hamworth, R. D., Jones, K., Rogers, H. J., and Searle, T., J. Chem. Soc., 1842 (1961).