Essential Oils

Side Effect and Contraindications of Eucalyptus Oil

As with all natural health remedies, eucalyptus essential oil can be used in total safety, but there are some conditions that can lead to serious side effects. Eucalyptus oil can, for example, cause harm if ingested.

In order to prevent any problems and instead get the benefits of this great natural and traditional supplement, you should be aware that all humans and animals except koalas cannot ingest this plant. The oil and powder, however, can be safely used externally or inhaled by diluting them in water.

Eucalyptus Oil should not be ingested. Even the dose of a teaspoon can be lethal.

Contact with the eyes is to be avoided, so be careful during the fumigations: it is better to keep the eyelids closed during exposure to steam.

As for external use, a first preliminary tolerance test is recommended to rule out any complications. Dilute a few drops in sweet almond oil and apply it to a small portion of the skin.

Do not exceed the doses even if well tolerated, remembering that high doses can have dangerous side effects.

The side effect and precautions of the eucalyptus refer to the use of the essential oil, which can cause side effects if used in high doses.

The article recommends reading: Eucalyptus oil uses and benefits

Side effects

Following the intake of eucalyptus or its preparations, undesirable effects may arise, such as nausea, vomiting, epigastric burning, esophagitis, and diarrhea.

Furthermore, sensitization reactions can occur in sensitive individuals.

On the other hand, after an overdose of eucalyptus essential oil, serious symptoms can occur, such as: decreased blood pressure, circulatory disturbances, collapse, convulsions, and asphyxiation.


Avoid taking eucalyptus-based preparations in case of ascertained hypersensitivity to one or more components, in patients with inflammatory pathologies of the gastrointestinal tract or bile ducts and in patients with severe liver disorders.

The use of eucalyptus essential oil is subject to specific contraindications, especially with regard to sensitive subjects such as children under six years and women during pregnancy or breastfeeding, for which its use is not recommended.

The article recommends reading: How to make a DIY disinfectant spray with essential oils.