Materia Medica by Allen

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 epidemicus, like every other remedy, is effective as a prophylactic.