Pharmaceutical Latin: Cortex Fraxini
Common English: Fraxinus Bark
Korean Ash Bark
Ash Bark
Herbs that Clear Heat and Purge Fire: Herbs that Clear Heat and Dry Dampness
Taste Temperature Entering Meridians Dosage
Large Intestine
Tincture: 1-3ml
Actions Indications/Syndromes

Clears Heat, resolves toxicity and dries Dampness (Stops diarrhea and dysentery - astringes)

Diarrhea, dysenteric disorders and vaginal discharge due to Damp-Heat


Drains Liver Fire and benefits the eyes

Liver Fire affecting the eyes with redness and swelling of the eyes, styes or superficial visual obstruction, leukoma

Disperses Wind-Dampness

Wind-Damp-Heat Bi

Calms wheezing, stops coughs and resolves Phlegm

Wheezing and coughs due to Lung Heat, bronchitis

  • Use caution for those with Spleen and Stomach Deficiency Cold.
  • Antagonizes Fr. Evodiae Rutaecarpae Wu Zhu Yu.

Rx. Pulsatillae
Bai Tou Weng
Cx. Phellodendri
Huang Bai

Rx. Sophorae Flavescentis
Ku Shen
Rx. Aucklandiae
Mu Xiang

Cx. Moutan
Mu Dan Pi

Hot dysenteric disorders due to Heat toxin searing the Stomach and Intestines.

Dysentery with severe tenesmus.

Damp-Heat vaginal discharge.

Rz. Coptidis
Huang Lian
Hb. Lophatheri
Dan Zhu Ye

Rx. Pulsatillae
Bai Tou Weng

Rx. Pulsatillae
Bai Tou Weng
Rz. Coptidis
Huang Lian

Redness and swelling of the eyes, sties, or superficial visual obstruction.

Cools Heat toxin and dries Dampness to treat Hot type red and white dysenteric disorders.

Diarrhea or dysentery with tenesmus due to Damp-Heat.

Sm. Cassiae
Jue Ming Zi
Hb. Equiseti Hiemalis
Mu Zei
Flos Chrysanthemi
Ju Hua



Eye redness and swelling due to Liver Fire.



  1. It is used primarily in formulas for Damp-Heat affecting the Large Intestine and Gallbladder.
  2. It is cold and drying to clear Damp-Heat, but also astringent to stop diarrhea.
  3. It can treat Wind-Damp Heat Bi, superficial visual obstruction, lack of Jing in males, vaginal discharge in females and childhood convulsions.
  4. It can be used as an eye wash.
  5. Charred Fraxinus Qin Pi Tan is less cold and more easily enters the Blood to stop bleeding and alleviate dysenteric disorders. It is often used for passage of mucus, pus and Blood in the stool in dysenteric disorders. It can also be used for Intestinal Wind and irregular uterine bleeding.