Synopsis

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

Glehnia littoralis, known as "bei sha shen" in Traditional Chinese Medicine (TCM), has a long history of use for respiratory conditions, particularly dry coughs and throat irritation. In TCM, it is considered to nourish the lungs and clear heat, making it a common ingredient in formulas to address coughs characterized by dryness or spasticity. Classical texts, such as the Ben Cao Gang Mu (Compendium of Materia Medica), describe its use for "lung yin deficiency" symptoms, which often include dry, irritating coughs. Contemporary TCM practice continues to employ Glehnia littoralis as a moistening and soothing agent for chronic coughs that lack significant phlegm.

Scientific studies on Glehnia littoralis are limited. While a few laboratory investigations suggest anti-inflammatory and immunomodulatory properties, robust clinical trials supporting its efficacy for spastic cough specifically are lacking. Most of the available data focus on its traditional usage and its chemical constituents (such as coumarins and polysaccharides), which may have some theoretical relevance to cough relief. However, the primary justification for its use in treating spastic cough remains rooted in traditional practice rather than modern scientific validation.

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