Which plant is antiviral, diaphoretic, and anti-inflammatory, used for colds and respiratory infections?

• A. Rubus idaeus
• B. Sanguinaria canadensis
• C. Sambucus nigra
• D. Salix alba

Answer: (C)

Elderberry stands out because it combines antiviral activity with fever-promoting and anti-inflammatory effects, which fits the needs of colds and respiratory infections. The berries and flowers contain polyphenols, especially anthocyanins, that have demonstrated antiviral effects against influenza viruses in lab studies and have some clinical data suggesting quicker relief of flu symptoms when used early. In addition, elderberry preparations used hot as a tea or syrup can act as a diaphoretic, helping to induce sweating during fever, a traditional approach to fever management. Its anti-inflammatory properties further help ease mucosal inflammation in the upper respiratory tract, reducing congestion and discomfort.

Raspberry is more associated with astringent and demulcent actions and is not typically used for antiviral effects or fever promotion. Bloodroot is an irritant with limited respiratory use and carries safety concerns, not an antiviral or diaphoretic for colds. Willow bark is well known for anti-inflammatory and analgesic effects but does not provide antiviral action or a diaphoretic effect for fever.