Mercurius cyanatus
Kent, Lectures on Homœopathic Materia Medica, 1905, p. 663
Lecture
Given a Merc, base and diphtheria, when the membrane is greenish and inclined to spread through the nose and involve a large surface, the Cyanide of Mercury is needed. It has exudation more marked than any other form of Mercury. Malignant forms of diphtheria, rapidly forming, and with phagedenic ulceration.