Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Pinellia ternata (commonly known as Banxia in Traditional Chinese Medicine, TCM) has a long history of use in East Asian medicine, particularly for treating respiratory conditions such as cough, phlegm, and related disorders. In classical TCM texts, Pinellia ternata is often included in herbal formulas such as Er Chen Tang and Banxia Houpo Tang, which are traditionally prescribed to resolve "phlegm-dampness" and alleviate cough. The herb is believed to have properties that transform phlegm, dry dampness, and descend rebellious Qi, which are all considered important in addressing cough in TCM theory.

Modern pharmacological studies have investigated Pinellia ternata for its expectorant and antitussive effects, primarily in animal models. Some studies have found that extracts of Pinellia ternata can reduce cough frequency and promote the clearance of airway mucus in rodents, potentially through modulation of inflammatory pathways and mucous secretion. However, rigorous human clinical trials are lacking, and most evidence remains preclinical or derived from traditional usage. Safety concerns also exist due to the presence of toxic compounds in raw Pinellia ternata, necessitating proper processing before use.

In summary, the use of Pinellia ternata for general cough is primarily justified by traditional medical practices, with some preliminary scientific investigation, but high-quality clinical evidence in humans is limited.

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