Pyrethrins are natural insecticides that don’t harm humans, but reportedly can be harmful to pets—cats and fish in particular. Note that fungus gnat larvae won’t be affected by this ...

Overview: Pyrethrins/piperonyl butoxide is applied to the skin to treat tiny insects called lice. The most common side effects are red, itchy, or irritated skin. Before using this medicine ...

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 ...

Overview: Permethrin is applied to the skin as a cream or lotion. It is used to treat certain conditions caused by tiny insects, such as scabies and head lice. The most common side effect is a ...