Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Bupleurum falcatum, a medicinal herb commonly used in traditional Chinese and East Asian medicine, is primarily justified for use in rhinitis by traditional practice rather than robust scientific validation. In traditional Chinese medicine (TCM), Bupleurum (Chai Hu) is used as part of multi-herb formulas to "soothe the liver," "harmonize the exterior and interior," and "disperse wind-heat," which are believed to correspond, in some cases, with symptoms of allergic rhinitis such as nasal congestion and inflammation. Formulations like Xiao Chai Hu Tang and others sometimes include Bupleurum for respiratory symptoms.

However, direct scientific evidence supporting Bupleurum falcatum as an effective single-agent treatment for rhinitis (including allergic or non-allergic rhinitis) is limited. Some laboratory studies suggest potential anti-inflammatory and immunomodulatory effects of Bupleurum extracts, which could theoretically be beneficial in rhinitis, but clinical trials specifically investigating its efficacy for rhinitis in humans are scarce or lacking. Most research involves either animal models or in vitro studies, and often Bupleurum is used in combination with other herbs, making it difficult to attribute effects specifically to this plant.

In summary, while Bupleurum falcatum has a long history of use in traditional medicine for symptoms overlapping with rhinitis, the direct scientific evidence supporting its use for this specific condition is weak, justifying a low evidence rating.

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