Originally native to Australia, eucalyptus trees are now grown all over the world and used for their medical properties. The healing power comes from eucalyptus oil, which is made from the tree’s oval-shaped leaves. For many years, eucalyptus oil has been used to relieve coughing. Today, some over-the-counter cough medications have eucalyptus oil as one of their active ingredients. Vapor-Eze Vapor Rub, for example, contains about 1.2 percent eucalyptus oil along with other cough suppressant chemicals. The popular rub is applied to the chest and throat to relieve cough symptoms from a common cold or flu. At Vapor-Eze, we are pioneers. Our state-of-the art line of vaporizers, humidifiers, and air purifiers has helped countless sufferers of colds, coughs and flu, and we want to do the same for you.