Evidence supporting the use of: Asarum sieboldii
For the health condition: Cough (spastic)

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Synopsis

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

Asarum sieboldii, also known as "wild ginger" or "saishin," is traditionally used in East Asian medicine, particularly within Traditional Chinese Medicine (TCM) and Kampo (Japanese herbal medicine), to treat respiratory ailments such as cough, especially spasmodic or persistent cough. The herb is a common component of classic formulas like Ma Xing Shi Gan Tang and Shoseiryuto that have been prescribed for centuries to address coughs and related symptoms. Its use is rooted in the belief that it can "dispel wind-cold," warm the lungs, and relieve cough and asthma. However, scientific evidence substantiating these effects is limited. While some laboratory studies suggest Asarum species may have antitussive and anti-inflammatory properties, high-quality clinical trials in humans are lacking. Most contemporary pharmacological insights remain preliminary, and concerns about toxicity (notably due to aristolochic acids) have led to restrictions on its use in several countries. Consequently, while Asarum sieboldii is indeed used traditionally for spastic cough, the scientific validation is weak, and its continued use must be weighed against safety considerations.

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