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The Side Effects of Eucalyptus Lavender Oil

author image Juniper Russo
Juniper Russo, an eclectic autodidact, has been writing professionally since 2008. Her work has appeared in several online and print-based publications, including Animal Wellness. Russo regularly publishes health-related content and advocates an evidence-based, naturopathic approach to health care.
The Side Effects of Eucalyptus Lavender Oil
Dried eucalyptus and lavender. Photo Credit: Drue Overby/iStock/Getty Images

The essential oils of lavender flower and eucalyptus leaf are frequently combined for use in aromatherapy. Lavender oil and eucalyptus may help to relieve depression, anxiety, pain, inflammation and congestion. Eucalyptus and lavender oils are associated with few side effects when they are used as a component of aromatherapy. However, both products are extremely toxic if they are taken internally. Consult your health care provider before using eucalyptus lavender oil if you have a serious medical condition.

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Skin Irritation

Some people develop a rash after skin exposure to eucalyptus and lavender oil. This reaction is most common in people with pre-existing allergies to either plant.

Respiratory Irritation

Eucalyptus and lavender are both traditionally used to ease symptoms of cough and asthma. However, these oils may worsen symptoms. People who are allergic to lavender or eucalyptus may develop an irritation of the eyes and nose after exposure to the plants during aromatherapy.

Digestive Problems

Neither lavender oil nor eucalyptus are safe to take internally, even in small amounts. Low doses of either oil can cause diarrhea, severe abdominal pain, vomiting and rectal bleeding.


When taken internally, eucalyptus lavender oil can cause acute poisoning, leading to severe or life-threatening problems. Symptoms of poisoning include dizziness, fatigue, skin discoloration, seizures, difficulty breathing, muscle weakness, slurred speech and blurred vision. Seek immediate medical attention if you experience these symptoms.

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