Synopsis

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

Sundew (Drosera species) has a long history of use in traditional herbal medicine, particularly in Europe, for respiratory tract conditions. Historically, sundew has been employed as a remedy for coughs, bronchitis, asthma, and other ailments involving respiratory irritation, and it occasionally appears in traditional treatments for influenza-like symptoms. The primary rationale for its use has been its reputed antitussive (cough-suppressing) and expectorant properties. However, scientific evidence supporting the use of sundew specifically for influenza is very limited. Several in vitro studies suggest that extracts of Drosera species may possess some antimicrobial and anti-inflammatory properties, but there is a lack of robust clinical trials demonstrating efficacy against influenza viruses in humans. Most modern references cite its traditional use for soothing coughs rather than directly treating the influenza virus. As such, while the use of sundew for influenza is rooted in traditional practice, contemporary scientific validation is minimal, and it is not recognized by evidence-based medical guidelines as an effective treatment for influenza. Therefore, its use for this condition is best characterized as traditional, with very weak supporting evidence.

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