Synopsis

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

Arisaema, commonly known as Jack-in-the-pulpit or "Tian Nan Xing" in Traditional Chinese Medicine (TCM), has a long history of use for treating congestion, particularly in the context of respiratory ailments such as phlegm accumulation, cough, and chest congestion. Classical TCM texts describe Arisaema as having properties that help "transform phlegm" and "disperse wind," which relates to its traditional application for conditions involving mucus or obstructed airways. The tuber is often processed to reduce toxicity and is included in herbal formulas targeting phlegm-dampness syndromes. There is, however, limited scientific research validating these effects in modern terms. While some in vitro and animal studies suggest anti-inflammatory and expectorant effects of compounds found in Arisaema, robust clinical trials in humans are lacking. Furthermore, the plant contains potentially toxic substances (notably calcium oxalate crystals), and improper use can cause irritation or poisoning. Thus, its application is rooted primarily in traditional practice, supported by centuries of anecdotal use and TCM theory, rather than rigorous scientific evidence. Caution is warranted due to its toxicity, and it should only be used under the guidance of a qualified practitioner.

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