Also known as the amur cork, phellodendron is a type of tree. The name "huang bai" comes from the bright yellow color of the plant's inner bark, which is used in herbal preparations. The bark is peeled from the tree during the late spring (after the rough outer bark is removed), then allowed to dry in the sun. The bark can be used either raw, or after being fried with salt.
In traditional Chinese medicine, phellodendron bark is considered to have bitter and cold properties, and is associated with the Kidney and Bladder meridians. Its main functions are to drain damp heat and kidney fire. Among the conditions it is used to treat are diarrhea, dysentery, swollen joints in the legs, and jaundice. Phellodendron bark is often used in conjunction with other herbs, such as atractylodes, akebia stems, and plantain seeds.
The typical dosage of phellodendron bark is between 3 and 12 grams of powdered herb, boiled in water and taken as a bolus or infusion. It is often used with other herbs (depending on the condition being treated).
Sliced, dried phellodendron bark can be found at some Asian markets and herbal shops. Many stores also sell phellodendron powders and capsules.
Phellodendron should not be taken by patients diagnosed with spleen and/or stomach problems. High doses of phellodendron may cause nausea and vomiting; in these instances, patients should discontinue use. In addition, the American Herbal Products Association has given phellodendron bark a class 2B rating due to its high berberine content, meaning that it should not be taken by women during pregnancy.
As of this writing, there are no known drug interactions with phellodendron bark. As always, make sure to consult with a licensed health care provider before taking phellodendron or any other herbal remedy or dietary supplement.
References
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