A non-toxic composition for the treatment and prevention of ectoparasite infestations is provided. In its most basic form, the composition comprises a combination of effective amounts of cinnamon oil, oregano oil and either citronella oil or lavender oil. Additional oils, including both citronella oil and lavender oil, in addition to peppermint oil, orange oil, tea tree oil and rosemary oil may be added to the composition while still maintaining the efficacy of the composition. The composition may be combined with a carrier agent and the combination may be applied to a subject to effect the elimination of ectoparasites and the prevention of new infestations. Preferably, the carrier agent is a shampoo, a conditioner, a non-aqueous spray, a body wash or a lotion.
