The double meaning of pharmakon, both “healing drug” and “poison,” sums up the ambiguity of Greek snake-power. Snakes crystallize the double-edgedness of pharmaka.
Padel argues that pharmakon’s irreducible semantic duality—cure and toxin simultaneously—finds its emblematic expression in the snake, making the term the master figure for the ambivalence of Greek magical and healing power.
, In and Out of the Mind Greek Images of the Tragic Self, 1994thesis