Lemon Eucalyptus essential oil has been used historically to open the lungs. In a trial double blind study, of 32 steroid dependent asthmatics, the people using eucalyptus gradually reduced steroid dosage to a greater extent than placebos. Eucalyptus is used in cough drops and cough syrups. Cold remedies also use eucalyptus monoterpenes commercially. Studies using eucalyptus for bronchitis indicated it helped prevent the worsening of symptoms in articles in Phytotherapy Research The camphoraceous aroma encourages deep inhalation, which can lessen respiratory symptoms or prevent them from worsening, so many studies are not definitive. People who like it enjoy the multifaceted aromas of mint, and the smell of forests, promoting relaxation and helping them clear their thoughts. The essential oil is not for internal use.
Eucalyptus in aroma blends can easily overwhelm other aromas. Use it sparingly. A little goes a long way.
Eucalyptus, especially citriodora, is a common insect repellent for mosquitoes and used for other household insect repellent.
It should not be used, other than cough drops and cold over the counter medicines, if nursing, pregnant, young children under 10, people with liver or kidney disease.
The most concerning fact about eucalyptus, is it's effect on the environment. It is a heavy feeder, absorbing all the nutrients and moisture, leaving the soil unusable for further productive use, especially food agriculture.
For External Use Only.