Synopsis

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

Coltsfoot (Tussilago farfara) has a long history of traditional use for treating coughs, especially those associated with "dampness" or excessive phlegm in traditional medicine systems such as Traditional Chinese Medicine (TCM) and European herbalism. The leaves and flowers of coltsfoot have been used in teas, syrups, and lozenges as an expectorant and demulcent, intended to soothe the throat and help expel mucus. In TCM, coltsfoot (kuan dong hua) is classified as a herb that transforms phlegm and stops cough, particularly where there is dampness or phlegm accumulation in the lungs.

Scientific evidence for the efficacy of coltsfoot in treating cough is limited. Some phytochemical analyses have identified mucilage, flavonoids, and other compounds with potential anti-inflammatory and soothing properties, which could theoretically help with cough symptoms. However, rigorous clinical trials are lacking, and much of the support for its use comes from traditional practice and anecdotal evidence rather than robust scientific data. Additionally, concerns have been raised regarding the presence of hepatotoxic pyrrolizidine alkaloids in coltsfoot, which has led to restrictions in some countries.

In summary, coltsfoot's use for cough (damp) is well-supported by tradition, but current scientific validation is limited and does not robustly confirm its efficacy or safety. Caution is advised due to potential toxicity.

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