Historically, neem has been used to rid the body of all forms of parasites. Scientists have since proved that neem quickly kills external parasites and may kill internal parasites as well (Singh et al., 1979); (Obaseki and Jegede-Fadunsin, 1986); (Rochanakij, 1985).
There are numerous Ayurvedic preparations and home remedies using neem for this purpose throughout India. In fact, simple water extracts of neem leaves are preferred over standard treatments for lice and scabies.