Dan Fan (Chalcanthite)——Shen Nong Ben Cao Jing (Shen Nong’s Herbal)
The Processing of Dan Fan
The blue vitriol or manmade hydrous blue vitriol (CuSO4 •5H2O) of the family Vitriol.
Most area in China.
Mined all the year round.
The actual smell and taste
Big, blue, transparent, brittle and without impurities.
Grinded or grinded after calcined in the fire.
The Effect of Dan Fan
Bitter, astringent, cold; toxic; liver, stomach, spleen, and gallbaldder meridians entered.
Induce vomiting, remove toxicity and dry dampness, corrode to eliminate putridity.
A. Inflammation of throat and epilepsy due to excessive wind-phlegm, and be poisoned by mistaking
It is a common used emetic herh because of its strong action of promoting vomiting. It is indicated for all the diseases of which the vomiting promoting should be used. For inflammation of throat, acute throat troubles, the tract obstructed by phlegm and the drag-saw-liked voice, it is combined with wind-extinguishing and phlegm-dispelling herbs, For instance, it is used with Jiang Can in the formula Er Sheng San from Ji Sheng Fang. For epilepsy due to wind-phlegm, it is smashed into powder and taken with warm vinegar singly from Tan Shi Xiao Er Fang. For be poisoned by mistaking, it could be dissolved in warm water to promote vomiting to dispel toxin.
B. Aphtha, ulcerative gingivitis, blepharitis
It can remove toxin and dry dampness when it is used externally with its low concentration pharmaceutical preparation. For aphtha, it could be smashed into powder with Chan Su and externally applied which is recorded in Sheng Hui Fang. For ulcerative gingivitis, it could be smashed into powder after calcined and pasted on the affected area, or combined with dampness-drying and heat-clearing herbs. For instance, it is used with Er Cha and Hu Huang Lian in the formula Dan Fan San from Shen Shi Zun Sheng Fang. For blepharitis, it could be smashed into powder after calcined and dissolved in water for douche.
C. Unruptured carbuncles, sores, multiple abscess; necrotic tissue
It can corrode and eliminate putridity when it is used externally with its high concentration pharmaceutical preparation. For pervade swollen of sores, it could be smashed into powder for external application from Zhi Zhi Fang. For pain due to necrotic rissue, incessantly of pus and bleeding, it could be smashed into powder for external aplication to corrode and eliminate putridity.
Dosage and Administrations
Internal use 0.3~0.6 g for pills or dissolved in warm water; an appropriate dosage for external usage: Puff with its powder or paste with it, or dissolve it in water for douche.
It is contraindicated in the case of the weak constitution. Internal use of the herb could impair the mucosa of mouth or stomach, therefore, it is better for external use.