Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Bupleurum falcatum, commonly known in traditional Chinese medicine (TCM) as Chai Hu, has a long history of use for various inflammatory conditions, including those affecting the respiratory tract. Its traditional applications often include formulas designed to "harmonize" the immune response, reduce fever, and alleviate symptoms associated with colds and respiratory allergies. While Bupleurum itself is not typically singled out as a primary agent for allergic rhinitis within TCM, it is a component of several herbal formulas (such as Xiao Chai Hu Tang) that are sometimes used for respiratory conditions, including rhinitis-like symptoms. The theoretical basis in TCM is its ability to disperse "Liver Qi" and clear heat, which are considered relevant to the manifestation of allergy symptoms in traditional paradigms. However, direct scientific evidence supporting Bupleurum falcatum for allergic rhinitis is sparse. Some laboratory studies have shown that extracts of Bupleurum possess anti-inflammatory and immunomodulatory properties, but clinical trials specifically targeting allergic rhinitis are lacking. Most modern references to its use for this condition are grounded in traditional practice rather than robust clinical evidence. Thus, while it is traditionally used in multi-herb formulas that may be applied to allergic rhinitis, the strength of evidence for its efficacy in this specific indication is weak (rated 1/5).

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