Mercurius Cyanatus is a homeopathic remedy for mouth ulcers, tongue pale. Free salivation. Fetor of breath, sore throat with hoarseness. Ulcerations of mouth have a gray membrane. Modalities:: WORSE from swallowing; speaking; after eating. SOURCE: Boericke Materia Medica
You can find Mercurius Cyanatus Pills at Remedy Source.