Evidence supporting the use of: Licorice (unspecified)
For the health condition: Cough (spastic)

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Synopsis

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

Licorice (Glycyrrhiza glabra) has a long history of traditional use as a remedy for coughs, including spastic (or spasmodic) cough. In traditional systems of medicine such as Traditional Chinese Medicine (TCM), Ayurveda, and various European folk practices, licorice root was often included in herbal mixtures aimed at soothing the throat, reducing cough reflex, and easing respiratory irritation. The demulcent (soothing) properties of licorice are attributed to its glycyrrhizin content, which may help coat mucous membranes and relieve irritation, potentially lessening cough severity. Though traditional use is well documented, the scientific evidence supporting licorice for spastic cough is moderate. Some laboratory and limited clinical studies suggest that licorice extracts possess anti-inflammatory, antitussive, and soothing effects on airway tissues, but robust, high-quality clinical trials in humans are lacking. Most evidence remains anecdotal or from small studies with methodological limitations. Therefore, while licorice is widely recognized in traditional medicine for cough relief, and there are plausible mechanisms of action, the overall strength of scientific evidence does not yet fully validate its traditional uses for spastic cough.

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