Mercurius Cyanide
Allen, Keynotes and Characteristics with Comparisons of Some of the Leading Remedies of the Materia Medica, 3rd ed., 1910, p. 189
Cyanide of Mercury. Hg{CN2)-
Keynotes
Malignant diphtheria with intense redness of fauces and great difficulty of swallowing; pseudo-membranous formation extends all over fauces and down throat ; putrid, gangrenous diphtheria, with phagedenic ulceration; membranous croup.
Great weakness; extreme prostration; cannot stand up from weakness.
When it corresponds to the genus epidemics, like every other remedy, is effective as a prophylactic.