Evidence supporting the use of: Marshmallow
For the health condition: Pertussis

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Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Marshmallow (Althaea officinalis) has a long history of use in traditional herbal medicine for soothing respiratory tract irritations, including coughs such as those seen in pertussis (whooping cough). The root contains mucilage, a gelatinous substance thought to coat and soothe inflamed mucous membranes in the throat and respiratory passages. Historical texts and traditional herbal compendia from Europe and the Middle East describe marshmallow tea or syrup as a remedy for dry, irritating coughs and bronchial conditions.

However, scientific validation for its use specifically in pertussis is lacking. Most modern studies on marshmallow focus on its demulcent (soothing) effects and mild anti-inflammatory properties in general coughs and sore throats, not on the Bordetella pertussis infection itself. There are no clinical trials demonstrating a reduction in severity, duration, or transmission of pertussis with marshmallow use. Thus, its application to pertussis remains within the realm of tradition rather than evidence-based medicine. In summary, marshmallow is used based on historical precedent as a symptomatic soother rather than as a direct treatment for the underlying infection.

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