While many species of eucalyptus exist, the leaves and oil of Eucalyptus globulus are most commonly used medicinally, according to the University of Maryland Medical Center. Its components are included in traditional and commercial preparations for treating sinus congestion and other symptoms of upper respiratory disorders. Use herbal remedies only under the supervision of a health care provider qualified in botanical medicine.
Decongestant Uses
Eucalyptus oil helps loosen phlegm, so inhaling the vapors may be beneficial for treating bronchitis, coughs and the flu, as noted by the UMMC. Some people apply eucalyptus oil ointments to the nose and chest to relieve sinus and bronchial congestion. Although the oil and one of its chemical components, eucalyptol, are included in a variety of preparations, Medline Plus cautions that there is limited scientific research on its effectiveness as a decongestant.
Product Types
Many products are available if you'd like to try eucalyptus for sinus congestion or other cold and flu symptoms. Vicks VapoRub and Mentholatum Ointment both contain eucalyptus oil, for example, and the substance is included in many lozenges and cough syrups. Eucalyptus tea also is available commercially, or you can make it with fresh eucalyptus leaves, for relieving sinus and bronchial congestion and for soothing sore throats.
Homemade Preparations
For a vapor bath to relieve congestion, add 5 to 10 drops of eucalyptus oil to 2 cups boiling water, then place a towel over your head and inhale the steam. If you'd like to make your own topical eucalyptus preparation, add 15 to 30 drops of oil to 1/2 cup of your favorite carrier oil--sesame or olive oil, for example.
Considerations with Children
Be cautious about using eucalyptus for treating congestion in youngsters, advises the UMMC. Children should not take the leaves or oil internally, although those seven years of age and older can use cough drops containing eucalyptus. Using eucalyptus as a steam or chest rub is generally safe for children, but never apply a eucalyptus preparation on the face of children under age two, as it can cause breathing spasms in these little ones.
Caution
Some people experience allergic skin reactions after applying eucalyptus oil products topically. This may be more likely in people with other allergies or with asthma. Additionally, eucalyptus oil could trigger an asthma attack in people with this health condition. Taking even a small amount of undiluted eucalyptus oil internally can be dangerous, warns Medline Plus. Drinking large amounts of eucalyptus leaf tea can cause kidney and liver damage, although one cup three times daily is generally considered safe.
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