Synopsis

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

Paris polyphylla, known as "Chonglou" in traditional Chinese medicine (TCM), has a long history of use in East Asian herbal practices. Its rhizome is traditionally used to "clear heat," "detoxify," and "reduce swelling," and it is sometimes included in polyherbal formulations for respiratory symptoms such as cough, phlegm, and lung congestion. However, its primary historical applications are for snakebites, abscesses, trauma, and certain types of cancer, with lung congestion being a secondary or indirect indication.

Scientific studies on Paris polyphylla focus mainly on its steroidal saponins (like polyphyllin D), which have demonstrated anti-inflammatory, antimicrobial, and cytotoxic effects in vitro and in animal models. Nevertheless, direct clinical evidence supporting its efficacy for treating lung congestion or respiratory infections in humans is lacking. No high-quality randomized controlled trials or pharmacological investigations specifically address the herb’s effects on lung congestion.

In summary, the use of Paris polyphylla for lung congestion is supported mainly by traditional texts and practice, with only indirect scientific support based on its general anti-inflammatory and antimicrobial properties. The overall evidence rating is moderate (2/5), primarily due to the absence of targeted clinical research for this specific indication.

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