Information In the nose, the medicinal vapours provide a cooling sensation that helps to relieve the feeling of loaded breathing *. In the throat, VapoDrops provide a demulcent effect that soothes irritation **. * R. Ecceles, Menthol: Effects on nasal sensation of airflow and the drive to breathe. Current Asthma and Allergy Reports, 2003, 3:210-214 ** Demulcent Martindale The Complete Drug Reference, 36th Edition, 2009 pg 1547 Vicks VapoDrops contain Menthol as an active ingredient. When taken, the therapeutic vapours are quickly inspired into the airways and reach the nose and throat in seconds.