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Olbas Oil 30ml - Inhalant Decongestant Oil - Relief from Catarrh, Colds

Olbas Oil 30ml - Inhalant Decongestant Oil - Relief from Catarrh, Colds

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  • ✔️ Relieves nasal congestion and catarrh from colds fast
  • ✔️ Versatile use: inhalation, steam, or topical chest rub
  • ✔️ Suitable for adults and children over 3 months (children's version)
  • ✔️ Plant-derived essential oil blend — no drowsy antihistamine effects
  • ✔️ Compact 30ml bottle ideal for home and travel use

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What Is Olbas Oil Decongestant and How Can It Help You?

 

When a cold or bout of catarrh leaves you feeling blocked up and miserable, finding something that actually works matters. Olbas oil decongestant is a well-established, plant-derived inhalant oil that has been used in the UK for decades to ease nasal congestion, relieve catarrh, and help you breathe more freely. Available without a prescription, it offers a non-drowsy option for adults and older children who need symptomatic relief from colds, sinusitis, and hay fever-related congestion. You can browse our full range of cold and flu remedies if you're looking for additional support alongside this product.

Olbas Oil 30ml contains a carefully selected blend of essential oils — including eucalyptus, cajuput, clove, juniper berry, menthol, mint, and wintergreen oil. Each of these has a long history of use in traditional inhalation therapy. The NHS recognises steam inhalation with aromatic oils as a method some people find helpful for easing the discomfort of nasal congestion caused by colds and similar upper respiratory conditions.

 

How Does Olbas Oil Work to Relieve Congestion?

 

The mechanism behind Olbas Oil is primarily physical and sensory rather than pharmacological in the conventional sense. When you inhale the vapour, the volatile compounds in the oil interact with receptors in your nasal passages and airways, producing a cooling, clearing sensation that can make breathing feel noticeably easier. Here's what happens step by step:

  • Volatile essential oil molecules are released into the air when the oil is applied to a tissue, added to hot water, or rubbed onto the chest.
  • Menthol and eucalyptus compounds activate cold-sensitive receptors (TRPM8 receptors) in the nasal mucosa, creating a sensation of improved airflow.
  • Cajuput and clove oils contribute mild anti-inflammatory and soothing properties to the inhaled vapour.
  • Steam inhalation (when drops are added to hot water) also helps to humidify and loosen thick mucus, making it easier to clear.

It's worth noting that while the sensation of relief is real and well-reported, the oils work symptomatically — they don't treat the underlying viral infection causing your cold.

 

Who Is Olbas Oil Suitable For?

 

Olbas Oil is suitable for a wide range of people dealing with upper respiratory symptoms. That said, it's not appropriate for everyone, so it's important to check before use.

  • Adults and teenagers experiencing nasal congestion from colds or sinusitis
  • People with hay fever-related nasal symptoms (used alongside other allergy treatments)
  • Adults suffering from catarrh or a blocked nose due to seasonal illness
  • Children aged 3 months and over — using the specific Olbas for Children formulation, not the standard adult product

It is not recommended for use in children under 3 months of age. People with asthma or other respiratory conditions should exercise caution, as strong inhalants can occasionally trigger bronchospasm. If you have any concerns, speak to your pharmacist before use.

 

How Does Olbas Oil Compare to Other Inhalant Decongestants?

 

Feature Olbas Oil 30ml Vicks VapoRub
Form Liquid inhalant oil Topical ointment/rub
Key ingredients Eucalyptus, menthol, cajuput, clove, juniper, mint, wintergreen Camphor, eucalyptus oil, menthol
Routes of use Inhalation (tissue/steam) and topical chest rub Topical chest/back rub only
Suitable for children Children's version available (3 months+) Not for children under 2 years

 

How Should You Store Olbas Oil and Is It Right for You?

 

Store Olbas Oil below 25°C, away from direct sunlight, and keep it out of reach of children. The bottle should be kept tightly closed when not in use, as the volatile oils evaporate readily. If you're managing seasonal nasal symptoms alongside other conditions, you might also find it useful to explore our allergy and hay fever range for complementary options.

As an olbas oil decongestant, this product is intended for short-term symptomatic use. It does not treat the underlying cause of your cold or infection. If symptoms persist beyond 7 days or are accompanied by a high fever, seek medical advice promptly.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Olbas Oil 30ml - Inhalant Decongestant Oil specifications
Treatment category Inhalant decongestant / catarrh relief
Mechanism of action Volatile essential oil inhalation activating nasal cold receptors; steam inhalation loosens mucus
Effective for Nasal congestion, catarrh, colds, hay fever-related congestion
Suitable for Adults and children (children's formulation for ages 3 months+)
Active ingredients Eucalyptus oil, cajuput oil, clove oil, juniper berry oil, menthol, mint oil, wintergreen oil
Pack size 30ml
UK classification General Sale List (GSL)
Drug class Inhalant decongestant (herbal/essential oil blend)
Preparation Liquid essential oil blend
Route of administration Inhalation; topical (chest/back rub)

Specifications of Olbas Oil 30ml - Inhalant Decongestant Oil

 

What Is Olbas Oil and What Is It Used For?

 

Olbas Oil 30ml is a General Sale List (GSL) medicine containing a blend of plant-derived essential oils. It is used as an inhalant decongestant to provide symptomatic relief from nasal congestion, catarrh, and the blocked, stuffy feeling associated with colds, sinusitis, and hay fever. It can be used via steam inhalation, applied to a handkerchief for direct inhalation, or rubbed sparingly onto the chest or back as a topical decongestant. The NHS advises that steam inhalation is one approach people use to ease the discomfort of a blocked nose during a cold, though it does not shorten the duration of illness.

 

What Do You Need to Know Before Using Olbas Oil?

 

Before using Olbas Oil, it's important to be aware of the following contraindications and warnings:

  • Do not use on or near the face of children under 3 months of age
  • Do not apply directly inside the nostrils of infants or young children
  • Avoid contact with eyes — the vapour and oil can cause significant irritation
  • Use with caution if you have asthma or chronic obstructive pulmonary disease (COPD), as strong inhalants may trigger bronchospasm in sensitive individuals
  • Do not apply to broken, inflamed, or sensitive skin
  • If you are pregnant or breastfeeding, consult your GP or pharmacist before use
  • Keep out of reach of children — essential oils are toxic if swallowed

In terms of drug interactions, Olbas Oil is used topically and by inhalation at low doses, and no clinically significant drug interactions have been established at recommended use levels. However:

  • Inform your pharmacist if you are using any other topical medicines on the same area of skin
  • Do not use simultaneously with other strong inhalants without pharmacist advice

 

How Should You Use Olbas Oil?

 

Always use Olbas Oil exactly as directed on the packaging. Do not exceed the recommended number of drops. Here are the step-by-step instructions for the most common methods of use:

  1. For inhalation via handkerchief: place 2–3 drops onto a clean handkerchief and inhale the vapour as needed throughout the day.
  2. For steam inhalation: add 3–4 drops to a bowl of hot (not boiling) water. Lean over the bowl, cover your head with a towel, and inhale the steam for up to 10 minutes. Take care to avoid scalding.
  3. For topical use (adults only): apply a small amount to the chest or back and rub in gently. Do not apply near the face of children.
  4. For use on a pillow: place 1–2 drops on the corner of a pillowcase to aid breathing during sleep.
Indication Age Group Dose Frequency
Nasal congestion / catarrh Adults & children over 3 months (children's version) 2–3 drops on handkerchief As needed
Steam inhalation Adults & older children (with supervision) 3–4 drops in hot water Up to 3 times daily
Topical chest rub Adults only Small amount rubbed in Up to 3 times daily
Pillow inhalation Adults & older children 1–2 drops on pillowcase corner At night as needed

If you're also managing ear, nose, or throat symptoms more broadly, our ear, nose and throat range includes a variety of complementary products that may help.

 

What Are the Possible Side Effects of Olbas Oil?

 

Like all medicines, Olbas Oil can cause side effects, although not everyone experiences them. The NHS advises that you should stop using any product and seek advice if you develop an unexpected reaction.

Common side effects:

  • Mild skin irritation or redness at the site of topical application
  • Temporary stinging or watering of the eyes if vapour comes into contact with them
  • Mild headache in some individuals sensitive to strong aromatic vapours

Less common side effects:

  • Allergic skin reaction (contact dermatitis) — particularly in those with known sensitivity to essential oils
  • Bronchospasm or worsening of breathing in people with asthma or COPD
  • Nausea if the vapour is inhaled in an enclosed space for a prolonged period

If you experience any signs of a serious allergic reaction — such as swelling of the face, lips, or throat, difficulty breathing, or a widespread rash — stop use immediately and seek emergency medical attention.

 

How Should You Store Olbas Oil?

 

  • Store below 25°C in a cool, dry place away from direct sunlight
  • Keep the cap tightly closed after each use to prevent evaporation of the volatile oils
  • Do not store near heat sources or open flames — the oil is flammable
  • Keep out of reach and sight of children at all times
  • Do not use after the expiry date printed on the bottle
  • Do not dispose of via wastewater or household waste — return unused medicine to your pharmacist

If you're looking for additional support during cold and flu season, you might also find our pain relief range helpful for managing associated headaches or body aches alongside your congestion symptoms.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Olbas Oil 30ml online in the UK?

You can buy Olbas Oil 30ml directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for just £7.49 with convenient home delivery. It is a General Sale List medicine, so no prescription is needed. It's also widely available in UK pharmacies and supermarkets, but ordering online saves you a trip when you're feeling under the weather.

How does Olbas Oil work as a decongestant in the body?

Olbas Oil works by releasing volatile essential oil compounds — particularly menthol and eucalyptus — that activate cold-sensitive receptors (TRPM8) in the nasal passages when inhaled. This creates a cooling sensation that makes breathing feel clearer and easier, even though the nasal passages themselves may not physically widen. Steam inhalation also helps to humidify and loosen thick mucus, making it easier to clear naturally.

How do I use Olbas Oil step by step?

The simplest method is to place 2–3 drops on a clean handkerchief and inhale the vapour as needed throughout the day. For a more intensive approach, add 3–4 drops to a bowl of hot (not boiling) water, lean over it with a towel over your head, and inhale the steam for up to 10 minutes — taking care to avoid scalding. You can also rub a small amount onto your chest or back as a topical decongestant, or place 1–2 drops on the corner of your pillowcase at night.

What is the correct dose of Olbas Oil for adults?

For adults, the standard dose is 2–3 drops on a handkerchief for inhalation, or 3–4 drops added to hot water for steam inhalation, used up to three times daily. For topical chest application, use a small amount and rub in gently — do not apply excessively. Always follow the directions on the product packaging and do not exceed the recommended dose.

Is Olbas Oil safe for children to use?

The standard Olbas Oil 30ml is not recommended for children under 3 months of age, and the adult formulation should not be applied directly to the face or nostrils of young children. For children aged 3 months and over, the specifically formulated Olbas for Children product is the appropriate choice, as it contains a gentler concentration of essential oils. Always supervise children during steam inhalation to prevent scalding.

Can I use Olbas Oil if I have asthma?

If you have asthma or any other chronic respiratory condition such as COPD, you should speak to your GP or pharmacist before using Olbas Oil. Strong aromatic inhalants can occasionally trigger bronchospasm in sensitive individuals, which could worsen breathing difficulties. Your pharmacist can help you identify a safer alternative if needed — you can also explore our ear, nose and throat range for other options.

Can I use Olbas Oil during pregnancy or while breastfeeding?

If you are pregnant or breastfeeding, you should consult your GP or pharmacist before using Olbas Oil, as some essential oils are not recommended during pregnancy. While the product is used externally and by inhalation at low doses, professional guidance is always advisable during pregnancy to ensure both your safety and that of your baby. Do not assume that a natural or plant-based product is automatically safe in pregnancy.

What are the side effects of Olbas Oil?

Side effects are uncommon when Olbas Oil is used as directed, but may include mild skin irritation or redness at the site of topical application, and eye irritation if the vapour or oil comes into contact with the eyes. In rare cases, people with sensitivity to essential oils may develop a contact allergic reaction. If you experience difficulty breathing, swelling, or a widespread rash, stop use immediately and seek medical attention.

How long can I use Olbas Oil for?

Olbas Oil is designed for short-term symptomatic relief and is not intended for prolonged daily use. If your cold or congestion symptoms have not improved after 7 days, or if they worsen at any point, you should consult your GP or pharmacist for further assessment. Persistent nasal congestion may indicate an underlying condition such as sinusitis or allergic rhinitis that requires a different treatment approach.

What are the alternatives to Olbas Oil for nasal congestion?

There are several alternatives depending on the cause of your congestion. Saline nasal sprays are a gentle, drug-free option suitable for most people including pregnant women. Decongestant nasal sprays containing xylometazoline or oxymetazoline provide faster relief but should not be used for more than 7 days. For hay fever-related congestion, antihistamines or corticosteroid nasal sprays may be more appropriate — browse our allergy and hay fever range for more options.

Can Olbas Oil be used for hay fever symptoms?

Yes, Olbas Oil can provide temporary symptomatic relief from the nasal congestion and blocked nose associated with hay fever, though it does not treat the underlying allergic response. For more targeted hay fever management, antihistamines or corticosteroid nasal sprays are typically recommended by the NHS. Olbas Oil works well as a complementary measure to ease congestion while other treatments take effect.

Is Olbas Oil flammable — can I use it near candles or heat?

Yes, Olbas Oil is flammable due to its essential oil content, and you should keep it away from open flames, candles, and other heat sources. When using steam inhalation, always use hot water rather than boiling water, and never add the oil directly to a lit oil burner or candle warmer. Store the bottle in a cool, dry place away from heat and direct sunlight.

What happens if Olbas Oil is accidentally swallowed?

Olbas Oil is for external and inhalation use only — it must not be swallowed. Essential oils are toxic if ingested, even in small quantities, particularly for children. If accidental ingestion occurs, contact the NHS 111 service or your nearest A&E immediately and take the product packaging with you. Do not induce vomiting unless specifically instructed to do so by a medical professional.

What does the latest research say about essential oil inhalants for colds?

Research into essential oil inhalants such as eucalyptus and menthol confirms that they activate TRPM8 cold receptors in the nasal mucosa, producing a genuine sensation of improved nasal airflow, though they do not physically increase the diameter of the nasal passages. The NHS acknowledges steam inhalation as a method some people find helpful for easing cold symptoms, while noting it does not reduce the duration of illness. Ongoing research continues to explore the anti-inflammatory properties of individual essential oil components.

Can I use Olbas Oil alongside other cold and flu medicines?

Olbas Oil can generally be used alongside other cold and flu remedies such as paracetamol or ibuprofen for pain and fever, as it works by a completely different mechanism. However, avoid using it at the same time as other strong topical inhalants on the same area of skin. If you are taking any prescribed medicines or have an underlying health condition, check with your pharmacist first — you can also explore our cold and flu range for complementary products.

How Should You Use Olbas Oil?

Olbas Oil is versatile and can be used in several ways depending on your preference and the severity of your symptoms. Always read the product label carefully before use and follow the instructions provided. Here is a step-by-step guide to the most common methods:

Never apply Olbas Oil directly inside the nostrils, and always keep it away from the eyes. If using steam inhalation, take care to avoid scalding from the hot water or steam.

What Is the Correct Dose of Olbas Oil?

The correct dose depends on your age and the method of use. Always use the minimum effective amount and do not exceed the doses shown below. Using more than recommended will not improve results and may increase the risk of irritation.

When Is the Best Time to Use Olbas Oil?

There is no single "best" time — Olbas Oil can be used whenever your congestion symptoms are most troublesome. Many people find it particularly helpful first thing in the morning when nasal congestion tends to be at its worst after a night of lying down. Using it on your pillowcase at night can also help you breathe more comfortably during sleep, which is especially useful when a cold is disrupting your rest.

Steam inhalation is often most effective when used in the evening as part of a wind-down routine, helping to clear the airways before bed. During the day, the handkerchief method is discreet and convenient for use at home or work.

How Long Can You Use Olbas Oil For?

Olbas Oil is intended for short-term use to relieve the symptoms of colds, catarrh, and congestion. Most people use it for the duration of their cold, which typically lasts 7–10 days according to the NHS. If your symptoms persist beyond 7 days without improvement, or if they worsen at any point, you should stop using the product and consult your GP or pharmacist.

Prolonged or excessive use of any inhalant is not recommended. If you find yourself relying on Olbas Oil regularly over several weeks, this may indicate an underlying condition such as chronic sinusitis or allergic rhinitis that requires a different treatment approach.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Olbas Oil?

Olbas Oil is generally well tolerated when used as directed, and most people experience no side effects at all. However, as with any product containing active essential oils, some individuals may notice mild reactions, particularly with topical use or prolonged inhalation in an enclosed space.

  • Mild skin redness or irritation at the site of topical application
  • Temporary stinging or watering of the eyes if vapour comes into contact with them
  • Mild headache in individuals sensitive to strong aromatic vapours
  • Temporary sneezing or increased nasal discharge on first inhalation

What Are the Less Common Side Effects of Olbas Oil?

Less commonly, some people may experience more noticeable reactions, particularly those with pre-existing sensitivities to essential oils or fragrance compounds. These reactions are not typical but are worth being aware of before you start using the product.

  • Contact dermatitis — an allergic skin reaction causing redness, itching, or a rash at the point of application
  • Nausea or dizziness if the oil is inhaled in a poorly ventilated, enclosed space for an extended period
  • Worsening of nasal symptoms in rare cases of sensitivity to specific essential oil components

What Are the Serious Side Effects of Olbas Oil?

Serious side effects are rare but can occur, particularly in people with underlying respiratory conditions or known allergies to essential oils. You should be aware of the following warning signs and act promptly if they occur.

  • Bronchospasm or sudden worsening of breathing — particularly in people with asthma or COPD
  • Signs of a serious allergic reaction (anaphylaxis): swelling of the face, lips, tongue, or throat; difficulty breathing; rapid heartbeat; or a widespread skin rash
  • Severe skin blistering or burns if the undiluted oil is applied to sensitive or broken skin

If you experience any of these serious reactions, stop using Olbas Oil immediately and seek emergency medical attention by calling 999 or attending your nearest A&E department.

What Should You Do If You Experience Side Effects of Olbas Oil?

For mild side effects such as skin irritation, wash the affected area thoroughly with soap and water and avoid further topical application. If eye irritation occurs, rinse your eyes gently with clean, lukewarm water for several minutes. For mild headache or nausea, move to a well-ventilated area and allow the symptoms to settle naturally.

If side effects are persistent, worsening, or causing you significant concern, contact your pharmacist or GP for advice. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Olbas Oil Interact With Other Medicines?

No clinically significant drug interactions have been established for Olbas Oil when used at recommended doses by inhalation or topical application. Because it is not taken orally, it does not enter the bloodstream in meaningful quantities and is therefore unlikely to interact with systemic medicines. However, you should avoid applying it to the same area of skin as other topical medicines, and inform your pharmacist of all medicines you are taking if you have any concerns. People with asthma using inhaled corticosteroids or bronchodilators should seek pharmacist advice before using any strong inhalant product.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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