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Side effects of eucalyptus oil

Eucalyptus oil may cause irritation, nausea or severe reactions if misused. High doses can be toxic. Infants, pregnant women and those with asthma or liver conditions should avoid it without medical advice.

  • 18 Jun 2025
  • 5 min read
  • 80 views

Eucalyptus oil, extracted from the leaves of the eucalyptus tree, is widely used in traditional and alternative medicine. It's often applied for respiratory issues, muscle pain and skin conditions due to its anti-inflammatory and antimicrobial properties. However, despite its popularity, eucalyptus oil can cause side effects, especially when used in large amounts or without proper guidance. Understanding these potential reactions is essential for safe use.

In this blog, we will cover the potential side effects of eucalyptus essential oil.

Eucalyptus oil side effects

Here are some common side effects of eucalyptus oil on the body:

  • Skin irritation: Direct application without dilution can cause redness, burning, itching or a rash. These are common signs of a local allergic reaction. A patch test is recommended before first use.
  • Nausea, vomiting or diarrhoea: Ingesting eucalyptus oil can upset the digestive system, leading to abdominal pain, nausea, vomiting or diarrhoea, even in small amounts.
  • Dizziness or drowsiness: Inhaling concentrated vapours or ingesting the oil may cause light-headedness, dizziness or drowsiness.
  • Muscle weakness and ataxia: High doses can impair muscle coordination, balance and speech, a condition known as ataxia.
  • Seizures: Though rare, seizures may occur if large quantities are ingested, especially in children or those with neurological conditions.
  • Low blood pressure and irregular heartbeat: In severe cases, eucalyptus oil can lead to hypotension (low blood pressure) or arrhythmia (irregular heart rhythm).
  • Multi-organ failure: Extremely high doses can be toxic and may result in life-threatening complications involving multiple organs.

Who should not use eucalyptus oil?

Certain groups should avoid its use due to the risk of adverse reactions:

  • Infants and young children: Eucalyptus oil can cause serious breathing and nervous system problems and should never be used on or near babies and toddlers.

  • Pregnant and breastfeeding women: Due to a lack of conclusive safety studies, it's best to avoid eucalyptus oil during pregnancy and breastfeeding unless advised by a healthcare provider.
  • People with asthma or epilepsy: The strong aroma may trigger asthma symptoms or provoke seizures in sensitive individuals.
  • Individuals with liver conditions: Since eucalyptus oil is metabolised in the liver, people with liver disease may be more vulnerable to its toxic effects.

Conclusion

Eucalyptus oil may offer relief for various health concerns, but it can also lead to side effects ranging from mild skin irritation to serious complications. If you notice any unusual symptoms after using it, consult a doctor promptly. Regular medical visits for such concerns can often be covered under health insurance plans, reducing out-of-pocket expenses and ensuring timely care.

For older adults, side effects can be more severe. Choosing a reliable senior citizen health insurance policy helps ensure access to specialist consultations, emergency care and ongoing treatment, providing peace of mind and financial protection.


Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis, or treatment. Please consult your general physician or another certified medical professional for any questions regarding a medical condition. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.

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