Chaihu 柴胡 formulas & guiding out the old to bring in the new

Chaihu formulas are frequently used in contemporary clinics.  One of the most frequently used formulas, Xiaoyao San 逍遙散 (Free Wanderer Powder), is a relatively recent development in the history of Chinese medicine.  It first appeared, as far as I can tell, in the 11th century.  However, in the intervening time and perhaps especially in the […]

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