Sinomarin Cold & Flu relief is a 100% natural, nasal decongestant, specific for the relief of nasal symptoms of influenza and the common cold. The effectiveness of Sinomarin Cold & Flu relief due to the decongestant effect (by osmosis) of seawater hypertonic solution (2.3% NaCl) and the anti-inflammatory and antimicrobial properties and actions in the upper respiratory tract, essential oils of eucalyptus and mint as extract and thyme.