What is Olbas Oil Decongestant?
Olbas Oil Decongestant is a blend of essential oils used to relieve blocked nose and congestion. It works by releasing vapours that help clear the airways and make breathing easier.
Who is Olbas Oil Decongestant suitable for?
This product may be suitable for:
- Adults
- Children over 3 months (for inhalation only, check packaging)
- People with colds, flu, or sinus congestion
Do not use this product if you are allergic to any of the ingredients.
How to use Olbas Oil Decongestant
Always use this product as directed on the packaging.
- Add a few drops to a tissue and inhale the vapours
- Or add to hot water and inhale the steam
- Do not apply directly to the skin unless stated
- Avoid contact with eyes
How to store Olbas Oil Decongestant
- Store in a cool, dry place
- Keep below 25°C
- Keep the bottle tightly closed
- Keep out of sight and reach of children
- Do not use after the expiry date on the packaging
Side effects
Like all medicines, Olbas Oil can cause side effects, although not everybody gets them.
Possible side effects include:
- Skin irritation such as burning, redness or rash
- Hypersensitivity reactions
- Stinging sensation on the skin
- Eye irritation if vapours or liquid come too close
- Mild coughing or throat irritation if inhaled too strongly
- Rare allergic reactions such as swelling of the face, lips or tongue, or difficulty breathing
Stop using the product and seek urgent medical attention if you experience signs of a serious allergic reaction.
Prolonged or excessive use may cause headaches, nausea or worsening irritation of the nose and throat.
When to seek medical advice
Speak to a healthcare professional if:
- Symptoms worsen
- Symptoms do not improve after 7 days
- A child develops breathing difficulties
- The product is accidentally swallowed
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As a general sale product, no prescription is required. You can purchase directly.
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Our Clinical Authors
This page has been written by a registered UK pharmacist and reviewed by our clinical team to ensure it is accurate, clear and reflects current clinical guidance.
Last medically reviewed: 06 July 2026
Last updated: 06 July 2026