Common violet, mainly by its content in mucilage, has soothing, antitussive and anti-inflammatory properties. Moreover, its content in saponins confer expectorant properties, whereas salicylic acid gives analgesic properties.
This same component along with methyl-salicylate, eugenol and beta-sisosterol are responsible for the antipyretic properties, so it can reduce fever.
Components of violet for cough
Malic-acid and quercetin provide it with bacteriostatic properties that prevent the growth of bacteria.