Compositions comprising flavonoid-containing extracts from plants of the genus citrus and/or isolated citrus flavonoids and specific cationic surface active agents, and said composition for use as an agent for treating infestations with head lice

摘要

A method for treating an infestation of head lice in a patient in need thereof by killing the head lice and preventing a final development and a hatching of larvae from lice eggs. The method includes applying an effective amount of a composition on the hair of the patient. The composition includes about 0.1 to 1 wt.-% of at least one isolated Citrus flavonoid and 2 to 7 wt.-% of at least one cationic surface-active agent. The cationic surface-active agent is selected from a quaternary ammonium salt having one or two linear saturated C_8-26 alkyl chain(s), wherein the remaining alkyl residues are C_1-6 alkyl groups, and palmitamidopropyltrimonium chloride.