Synopsis

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

Aerva lanata, commonly known as mountain knotgrass, holds a significant place in traditional medicine systems such as Ayurveda and Siddha. The herb is often cited in classical texts and folk remedies as a treatment for various respiratory conditions, including dry cough. Its use is typically in the form of decoctions or infusions, sometimes combined with other herbs, to soothe coughs and clear respiratory passages. The traditional rationale is based on its purported expectorant, demulcent, and anti-inflammatory properties, which are believed to help relieve irritation and dryness in the throat.

However, modern scientific validation supporting its effectiveness specifically for dry cough is limited. While some pharmacological studies have indicated that Aerva lanata possesses anti-inflammatory, antimicrobial, and antioxidant properties, there is a lack of direct clinical evidence or controlled studies confirming its efficacy for dry cough. Most support for its use in this context is derived from ethnobotanical surveys and traditional knowledge rather than rigorous scientific evaluation. Therefore, while the herb continues to be used for this indication in traditional practice, the overall level of evidence remains low, meriting a rating of 2 out of 5.

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