Eucalyptol
Eucalyptol is a natural compound derived from eucalyptus oil, classified as a respiratory expectorant. It helps relieve symptoms of respiratory congestion by loosening and clearing mucus from the airways, making it easier to breathe.
Eucalyptol is an herbal expectorant used to relieve respiratory congestion and cough associated with colds and bronchial conditions.
Key facts at a glance
- ATC
- R05D
- RxNorm
- unknown
- Generic
- Eucalyptol
- Class
- atc-r05
- Brands
- Listerine Antiseptic, Listerine Ultraclean
- Availability
- otc
- Pregnancy
- C
- Lactation
- caution
- Half-life (h)
- 0
- Onset (min)
- 0
- Duration (h)
- 0
- Routes
- oral, topical, inhalation
- Forms
- mouthwash, topical cream, inhalant oil
- Regions
- United States, United Kingdom, Canada, Australia, Europe
- Monitoring
- none
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Used to relieve respiratory congestion, cough, and symptoms of common colds, bronchitis, and sinusitis. Often found in cough drops, chest rubs, and inhalation vapors.
Acts as an expectorant by stimulating respiratory secretions and helping to loosen and expel mucus from the airways. Also provides a cooling sensation that helps relieve nasal congestion.
Generally used topically or inhaled; oral ingestion in high amounts may cause toxicity. Avoid use in young children and infants. Those with eucalyptus allergies should avoid this product.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 28, 2026. · Read our editorial policy