Duccius[?] - inscriptions, notably a tombstone of Lucius Duccius Rufinus at York[2] (http://museums.ncl.ac.uk/archive/arma/contents/iconog/tombston/cent1/uk/york/duccius.htm)
... can have very distressing side effects. Illegitimate treatments, e.g. herbal medicines, do not have these side effects -- they have no effect.
Distrust of ...