Synopsis

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

Mullein (Verbascum thapsus) has a long history of use in traditional herbal medicine for the treatment of coughs, particularly those that are dry, spastic, or irritating. Historical sources from Europe and North America describe the use of mullein leaves and flowers in teas, syrups, and tinctures for soothing respiratory irritation, suppressing cough reflex, and promoting expectoration. The plant contains mucilage, which can coat mucous membranes and reduce irritation, as well as saponins and flavonoids, which may have mild anti-inflammatory and antispasmodic effects.

Modern scientific studies on mullein's efficacy for cough are limited. Some in vitro studies suggest mullein extracts possess anti-inflammatory, antimicrobial, and mild antitussive properties, but there is a lack of robust clinical trials in humans. Thus, the evidence supporting its use remains primarily traditional and anecdotal, though its safety profile is generally favorable when used appropriately. In summary, mullein is traditionally used for spastic cough, with some plausible mechanisms, but scientific validation remains modest.

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