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Mang Xiao (芒硝), mirabilite (sodium sulfate), purges accumulation and softens hardened stool, and drains heat; it is also used topically to reduce swelling.
Latin / Pharmaceutical Name
Natrii Sulfas (mirabilite)
Common English Name
Glauber's salt / mirabilite
Taste
Salty, bitter
Temperature
Cold
Channels Entered
Stomach, Large Intestine
Actions & Functions
- Purges accumulation and softens hardened, dry stool
- Clears heat and reduces swelling (topical, e.g. breast distension)
Indications
Constipation with hard, dry stool and heat; and (topical) swollen, painful breasts and skin swellings.
Dosage
6-12 g, dissolved in the strained, hot decoction (not boiled).
Common Combinations
With Da Huang to soften stool and drain heat (Da Cheng Qi Tang).
Cautions & Contraindications
Contraindicated in pregnancy; avoid in cold from deficiency.
