Indications
Eucalyptol (also called 1,8-cineole) is the main active part of eucalyptus oil. It is used:
- As capsules, to help loosen mucus and ease breathing in chest and sinus infections such as acute bronchitis and sinusitis
- In steam inhalations, chest rubs and nasal products, to relieve a blocked nose and chesty cough from colds
- In some mouthwashes and throat products
How It Works
Eucalyptol helps the tiny hairs lining the airways move mucus out more effectively, makes mucus easier to clear, and has a mild anti-inflammatory effect. Its strong smell also gives a feeling of clearer breathing.
Dosage and Administration
- Capsules (adults): follow the product label or the doctor’s advice; capsules are commonly taken 2 to 3 times a day before meals, swallowed whole with a cool drink.
- Inhalation: add the amount stated on the label to a bowl of hot (not boiling) water and breathe in the steam with the eyes closed.
- Chest rubs: rub a small amount on the chest and back; do not put it in or under the nose.
- Children: use only products made for children, as directed. Capsules are not for children unless a doctor advises.
Never swallow eucalyptus oil or liquid eucalyptol meant for inhalation or rubbing.
Interactions
Eucalyptol may change how the liver breaks down some medicines, though this is rarely important at normal doses. Tell the doctor or pharmacist about other medicines you take, especially if using capsules regularly.
Contraindications
- Allergy to eucalyptol or eucalyptus
- Inhalations and rubs near the face of babies and young children (under 2 years), as they can trigger breathing spasms
- Capsules in people with inflammatory bowel or stomach disease or serious liver disease
Side Effects
Capsules may cause stomach upset, nausea, burping with a eucalyptus taste or diarrhoea. Rubs can irritate the skin, and vapours can irritate the eyes. Allergic reactions are rare.
Get urgent medical help if there is swelling of the face or throat, difficulty breathing or wheezing, or a widespread rash. If a child swallows eucalyptus oil or liquid eucalyptol, this is an emergency even if they seem well.
Pregnancy and Lactation
Avoid capsules during pregnancy and breastfeeding unless a doctor advises. Short use of inhalations is generally considered low risk, but ask a doctor or pharmacist first. Do not apply rubs to the breasts while breastfeeding.
Precautions and Warnings
- Keep away from the eyes and broken skin.
- People with asthma may find strong vapours trigger wheezing.
- See a doctor if symptoms last more than a week, or if there is high fever, breathlessness or coughing up blood.
Overdose
Swallowing eucalyptus oil or liquid eucalyptol can be poisonous, even in small amounts in children. It can cause burning in the mouth, vomiting, drowsiness, unsteadiness, fits and breathing problems. Do not make the person vomit. Go to an emergency department straight away and take the product with you.
Therapeutic Class
Mucolytic and decongestant (plant-derived respiratory preparation).
Storage
Store below 30°C, away from heat, flames and light, with the container tightly closed and out of the reach of children.
Prepared by the Oshud Alo team from standard drug references. For information only; always follow your doctor's advice.