Walnuts have a long history of medicinal use and have been used in folk medicine for a wide range of complaints.
Walnuts also contain a chemical called juglone that is also useful for dealing with mite infestations.
100ml 1:5 Alcohol Volume 50%. Take 10 – 15 drops 2 x daily.
See what Wikipedia says:
http://en.wikipedia.org/wiki/Walnut