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 ...

Rid also contains an ingredient called piperonyl butoxide. This helps the pyrethrum extract work better because it prevents lice from breaking the pyrethrum extract down. The Environmental ...

Head lice affect more than 100 million people worldwide annually. Permethrin (1% formulation) is efficacious but resistance is emerging. Malathion (0.5% formulation) is an alternative, but ...

ALTHOUGH synergized pyrethrins have been used for fly control for many years, there is no published record of Musca domestica L. becoming resistant to this insecticide in the field.

Discussions about loss of effectiveness of head lice drugs containing pyrethrin or pyrethroid due to possible development of resistance are frequently published. However, in 2016, a randomized ...