Eucalyptus, a tropical evergreen native to the Australian continent, has been used for centuries as a treatment for coughs, colds and congestion. Today this plant's fragrant volatile oil is used as a complementary treatment for several diseases and conditions, including dental decay and ulcers. Whether applied topically or used in aromatherapy, eucyalyptus oil exerts a multifaceted effect on the human body. Oil of eucalyptus has been linked to several therapeutic benefits, as well as possible risks.
Antiseptic
According to the University of Maryland Medical Center (UMMC), eucalyptus oil contains cineole, which is a compound that effectively combats bacteria, viruses and fungi. When applied topically to the skin, eucalyptus oil may inhibit pathogens and treat active infections. Additionally, cineole destroys the bacteria responsible for bad breath and tooth decay, so it may be used in toothpaste and mouthwash.
Aromatherapy
UMMC notes that eucalyptus may be used in "fainting salts" designed to revive people who are unconscious. Aromatherapy practitioners may use eucalyptus oil to invigorate people suffering from fatigue and stress; its sharp aroma tends to cause feelings of alertness.
Expectorant
MedlinePlus acknowledges eucalyptus oil's long-standing reputation as a treatment for congestion. When inhaled, eucalyptus oil helps to loosen phlegm and promote its expulsion. The oil may also help to soothe irritated bronchial passages.
Insect Repellent
The eucalyptus tree developed its strong fragrance to deter insects and animals. Today, many outdoor enthusiasts have found that eucalyptus oil effectively repels insects like mosquitoes and ants. MedlinePlus notes that eucalyptus oil may also repel the ticks that carry Lyme disease and Rocky Mountain spotted fever, but there isn't enough scientific evidence to support this use.
Toxicity
Eucalyptus oil is toxic when ingested. MedlinePlus reports that consumed eucalyptus oil causes serious adverse effects like wheezing, muscle weakness, heart problems and vomiting. Without medical invertention, eucalyptus oil can lead to permanent organ damage and death.
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