Synopsis

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

Licorice root (Glycyrrhiza glabra) has been used in traditional medicine systems, especially in Chinese, Ayurvedic, and Greco-Arabic (Unani) medicine, as a remedy for coughs and other respiratory ailments. Its traditional use stems from the belief that licorice root soothes mucous membranes, reduces throat irritation, and acts as an expectorant to help clear mucus from the airways. Ancient texts and pharmacopeias frequently mention licorice as part of herbal mixtures for cough, bronchitis, and sore throat, supporting its status as a time-honored remedy.

Modern pharmacological studies suggest that licorice contains glycyrrhizin and other saponins, which may exhibit anti-inflammatory, demulcent (soothing), and mild antitussive (cough-suppressing) properties. Some in vitro and animal studies indicate that licorice extracts can decrease airway inflammation and possibly inhibit cough reflex sensitivity. However, high-quality clinical trials in humans are limited and generally small in scale, with inconsistent results. Most available clinical evidence is based on combination herbal formulas rather than licorice root alone, making it difficult to attribute efficacy specifically to licorice.

Overall, while licorice root’s use for spastic (irritable, persistent) cough is strongly supported by traditional practice and some pharmacological plausibility, the direct scientific evidence in humans is moderate and not robust. Caution is advised in long-term use due to potential side effects such as hypertension and hypokalemia.

More about licorice root
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Other ingredients used for Cough (spastic)

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