Individual Herbs Notebook

Fei Zao Cao

Translation: Soap Grass

Pharmaceutical: Radix Saponariae
Taxonomy: Saponaria officinalis

Other names: Soapwort Root

Category: Herbs that Transform Phlegm



Properties: Bitter, slightly toxic

Meridans Entered:
Primary: Lung


Traditional Actions/Indications:
  1. Dispels Wind, eliminates Dampness and kills parasites
    External use for various skin diseases
  2. Dispels Phlegm, eliminates Dampness and promotes urination
    Internally for cough with phlegm or watery mucus

Suggested Daily Dosage: 0.5-1.5g internally, usually cold extracted overnight or added to a decoction after removing from the heat and being left to cool down. Externally can be extracted and used as a wash.


Cautions: Overdose can cause breakdown of red blood cells and severe irritation to the digestive tract leading to cramps, nausea, vomiting, and diarrhoea. Avoid contact with the eyes if used externally and it may cause irritation to the skin.


Notable Constituents:
Does not appear in any formulae listed on this site
Research Links & References: (click to display)