Synopsis

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

Licorice (Glycyrrhiza spp.) has a long history of use in traditional medicine systems, particularly in Traditional Chinese Medicine (TCM), Ayurveda, and Unani medicine, as a remedy for dry cough and other respiratory ailments. The root of the licorice plant is most commonly used, often in the form of teas, syrups, or decoctions. Traditional practices cite its demulcent (soothing) and expectorant properties, which are believed to help coat and soothe irritated mucous membranes in the throat and airways, thus reducing cough frequency and severity.

Scientific evaluations of licorice for cough are limited, but some laboratory and animal studies suggest anti-inflammatory, antimicrobial, and soothing effects, potentially owing to compounds like glycyrrhizin and liquiritin. However, robust clinical trials in humans specifically targeting dry cough are sparse. A few small clinical studies and case series have noted improvements in cough symptoms with licorice preparations, but these are not sufficiently rigorous to establish strong scientific validation. As a result, licorice’s use for dry cough is mainly justified by traditional and historical use rather than high-level scientific evidence.

It is important to note that excessive or prolonged licorice consumption can lead to serious side effects, such as hypertension and electrolyte imbalances, due to glycyrrhizin content. Thus, while licorice is traditionally used for dry cough, caution and moderation are advised, and individuals with underlying health conditions or those taking certain medications should consult a healthcare professional before use.

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