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Sterimar Hypertonic Congestion Relief Nasal Spray – 100ml

Sterimar Hypertonic Congestion Relief Nasal Spray – 100ml

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  • ✔️ Relieves nasal congestion using drug-free hypertonic sea water
  • ✔️ Reduces swollen nasal tissue through natural osmotic action
  • ✔️ Suitable for adults and children aged 3 years and over
  • ✔️ No rebound congestion — safe for extended daily use
  • ✔️ Clears thick mucus to restore easier, freer breathing

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Is Sterimar Hypertonic Nasal Spray Right for Your Blocked Nose?

 

A blocked nose is miserable. Whether it's a cold, hay fever, or sinusitis making it hard to breathe, finding something that actually works — without harsh chemicals — matters. Sterimar Hypertonic Congestion Relief Nasal Spray 100ml is a drug-free, preservative-free sea water nasal spray designed to relieve nasal congestion by clearing excess mucus and reducing swelling in the nasal passages. It's suitable for adults and children aged 3 and over, making it a versatile option for the whole family. If you're also managing allergy-related symptoms, you might find our allergy and hay fever range useful alongside this spray.

Nasal congestion is one of the most common complaints seen in UK pharmacies. The NHS notes that a blocked nose is typically caused by swollen blood vessels in the nasal lining, often triggered by infection, allergens, or irritants. Sterimar's hypertonic formula — containing 2.3% sodium chloride derived from natural sea water — works with your body's own physiology rather than against it.

 

How Does Sterimar Hypertonic Nasal Spray Work?

 

The science behind this spray is straightforward. A hypertonic nasal spray contains a higher concentration of salt than your body's own fluids. This concentration difference creates an osmotic gradient — meaning fluid is drawn out of the swollen nasal tissue and into the nasal cavity, where it can be blown away. The result? Reduced swelling, thinner mucus, and easier breathing.

  • The 2.3% sodium chloride solution is more concentrated than standard isotonic saline (0.9%), making it more effective at reducing mucosal oedema.
  • It helps thin and loosen thick, sticky mucus so it can drain more easily.
  • The micro-diffusion spray delivers a fine, even mist that coats the nasal lining without causing discomfort.
  • It contains no decongestant drugs, so there is no risk of rebound congestion (rhinitis medicamentosa) with regular use.

 

Who Should Use Sterimar Hypertonic Congestion Relief Spray?

 

This spray is a good fit for anyone dealing with nasal congestion who wants a drug-free option. It's particularly useful if you've been told to avoid decongestant medications — for example, if you have high blood pressure or are pregnant. That said, always check with your pharmacist or GP if you're unsure.

  • Adults with nasal congestion caused by colds, flu, or sinusitis
  • Hay fever and allergy sufferers experiencing a blocked or runny nose
  • Children aged 3 years and over (under medical guidance for younger children)
  • People who cannot use medicated decongestant sprays due to health conditions or medication interactions

 

How Does Sterimar Hypertonic Compare to Isotonic Nasal Sprays?

 

Feature Sterimar Hypertonic (2.3% NaCl) Isotonic Saline Spray (0.9% NaCl)
Salt concentration 2.3% (hypertonic) 0.9% (isotonic)
Primary use Active congestion relief Daily nasal hygiene and moisturising
Suitable for blocked nose Yes — draws fluid from swollen tissue Mild benefit only
Drug-free Yes Yes

 

Is Sterimar Hypertonic Nasal Spray Safe to Store and Use Long-Term?

 

Storage is simple. Keep the spray below 25°C, away from direct sunlight, and store it upright. Do not freeze it. The can is pressurised, so keep it away from heat sources and do not puncture it. Once opened, the spray can be used until the expiry date printed on the packaging — there's no need to discard it after a set number of days, unlike some liquid nasal rinses.

Unlike medicated decongestant sprays, this hypertonic nasal spray does not carry a risk of dependency or rebound congestion, which makes it suitable for longer-term use when symptoms persist. If you're managing a cold alongside other symptoms, our cold and flu range has additional products that may help. Always read the label before use.

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.

Sterimar Hypertonic Congestion Relief Nasal Spray – 100ml specifications
Treatment category Nasal congestion relief
Mechanism of action Osmotic reduction of nasal mucosal oedema via hypertonic saline
Effective for Blocked nose, sinusitis, hay fever, colds
Suitable for Adults and children aged 3 years and over
Active ingredient Sodium chloride 2.3% (natural sea water)
Pack size 100ml
UK classification General Sale List (GSL)
Drug class Nasal saline preparation (non-medicated)
Preparation Pressurised nasal spray
Route of administration Intranasal

Specifications of Sterimar Hypertonic Congestion Relief Nasal Spray – 100ml

 

What Is Sterimar Hypertonic Nasal Spray and What Is It Used For?

 

Sterimar Hypertonic Congestion Relief Nasal Spray is a drug-free, preservative-free nasal spray containing 2.3% sodium chloride derived from natural sea water. It is used to relieve nasal congestion — that uncomfortable blocked feeling in your nose — caused by a range of conditions including the common cold, sinusitis, rhinitis, and hay fever. It works by drawing excess fluid out of swollen nasal tissues, helping to thin mucus and restore easier breathing. It is available over the counter without a prescription and is classified as a General Sale List (GSL) medicine in the UK.

 

What Do You Need to Know Before Using Sterimar Hypertonic Nasal Spray?

 

Before using this spray, there are a few important things to be aware of. It is generally well tolerated, but certain situations require extra caution.

Do not use this spray if:

  • You are allergic to any of the ingredients (sodium chloride, sea water components)
  • Your child is under 3 years old, unless a doctor or pharmacist has specifically advised it
  • You have had recent nasal or sinus surgery — seek medical advice first
  • You have a known condition affecting nasal anatomy that could be worsened by pressurised sprays

Warnings and precautions:

  • Avoid spraying directly onto the nasal septum — angle the nozzle slightly outward
  • If symptoms persist for more than 10 days, or worsen, consult your GP
  • Keep out of reach of children
  • The canister is pressurised — do not puncture, incinerate, or expose to temperatures above 50°C

Drug interactions:

  • No known drug interactions have been identified for this product
  • It does not contain any active pharmaceutical ingredients that would interact with other medicines

 

How Should You Use Sterimar Hypertonic Nasal Spray?

 

Using this spray correctly makes a real difference to how well it works. Follow these steps each time you use it.

  1. Blow your nose gently to clear any loose mucus before you start.
  2. Hold the spray upright and remove the protective cap.
  3. Tilt your head slightly forward and insert the nozzle into one nostril.
  4. Press the pump firmly and breathe in gently through your nose at the same time.
  5. Remove the nozzle and breathe out through your mouth.
  6. Repeat in the other nostril.
  7. Blow your nose gently again to remove loosened mucus.
  8. Replace the cap after use and store the spray upright.
Indication Age Group Dose Frequency
Nasal congestion (cold, sinusitis, hay fever) Adults and children 3+ years 1–2 sprays per nostril Up to 4 times daily
Nasal congestion Under 3 years Only on medical advice As directed by a doctor

 

What Are the Possible Side Effects of Sterimar Hypertonic Nasal Spray?

 

Side effects with this spray are uncommon. Because it contains no drugs or preservatives, the risk of adverse reactions is low. However, as with any nasal spray, some people may notice mild effects, particularly when first using it.

Common side effects:

  • Mild stinging or burning sensation in the nose immediately after use
  • Temporary increase in nasal discharge as mucus is loosened
  • Sneezing shortly after application

Less common side effects:

  • Nasal dryness if used very frequently
  • Mild irritation of the nasal lining

If you experience any unexpected or severe reaction, stop using the spray and speak to your pharmacist or GP. You can also report suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. For broader symptom management during a cold or allergy season, our ear, nose and throat range includes a variety of supportive products.

 

How Should You Store Sterimar Hypertonic Nasal Spray?

 

Correct storage keeps the spray effective and safe to use throughout its shelf life. If you're also managing children's symptoms, our baby and toddler range has age-appropriate products worth exploring.

  • Store below 25°C in a cool, dry place
  • Do not freeze
  • Keep away from direct sunlight and heat sources
  • Store upright at all times
  • Do not puncture or incinerate the pressurised canister, even when empty
  • Keep out of reach and sight of children
  • Do not use after the expiry date printed on the packaging

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 Sterimar Hypertonic Nasal Spray online in the UK?

You can buy Sterimar Hypertonic Congestion Relief Nasal Spray 100ml directly from Cured Pharmacy, a GPhC-registered UK online pharmacy. It is available without a prescription as an over-the-counter product. Simply add it to your basket and choose your preferred delivery option at checkout.

How does Sterimar Hypertonic Nasal Spray work in the body?

Sterimar Hypertonic Nasal Spray contains a 2.3% sodium chloride sea water solution, which is more concentrated than your body's own fluids. This concentration difference creates an osmotic effect, drawing excess fluid out of swollen nasal tissues and reducing congestion. It also helps to thin and loosen thick mucus so it can drain away more easily.

How do I use Sterimar Hypertonic Nasal Spray step by step?

Start by blowing your nose gently to clear any loose mucus. Insert the nozzle into one nostril, tilt your head slightly forward, press the pump, and breathe in gently through your nose. Repeat in the other nostril, then blow your nose again to remove loosened mucus.

What is the correct dose of Sterimar Hypertonic Nasal Spray for adults?

Adults can use 1–2 sprays per nostril, up to 4 times daily, or as needed to relieve congestion. There is no strict maximum daily limit for a drug-free saline spray, but if you find you need it very frequently, it's worth speaking to your pharmacist. Always follow the instructions in the patient information leaflet supplied with the product.

Can children use Sterimar Hypertonic Nasal Spray?

Yes — Sterimar Hypertonic is suitable for children aged 3 years and over. For children under 3, you should seek advice from a pharmacist or GP before use, as the hypertonic concentration may be too strong for very young nasal passages. Our baby and toddler range includes gentler alternatives for younger children.

What is the best time to use Sterimar Hypertonic Nasal Spray?

There is no single "best" time — use it whenever your nose feels blocked or congested, up to 4 times a day. Many people find it particularly helpful first thing in the morning, before bed, and before taking other nasal medications, as clearing the nasal passages first can improve the effectiveness of other treatments. Using it before sleep may also help you breathe more comfortably through the night.

What are the side effects of Sterimar Hypertonic Nasal Spray?

Side effects are uncommon because the spray contains no drugs or preservatives. Some people experience a mild stinging or burning sensation immediately after use, a temporary increase in nasal discharge, or sneezing. These effects are usually short-lived and settle within a few minutes of application.

How do I manage any irritation caused by Sterimar Hypertonic Nasal Spray?

If you notice mild stinging after use, this is normal and usually passes quickly. Try angling the nozzle slightly away from the nasal septum (the central dividing wall) to reduce direct contact with sensitive tissue. If irritation persists or worsens, stop using the spray and speak to your pharmacist.

Is Sterimar Hypertonic Nasal Spray safe to use during pregnancy?

Because Sterimar Hypertonic contains no active pharmaceutical ingredients — only natural sea water — it is generally considered safe to use during pregnancy. However, as with any product used during pregnancy, it is always sensible to check with your GP or midwife before starting a new treatment. Nasal congestion is very common in pregnancy due to hormonal changes, and drug-free options like this spray are often recommended.

Who is eligible to use Sterimar Hypertonic Nasal Spray?

This spray is suitable for most adults and children aged 3 and over who are experiencing nasal congestion. It is particularly useful for people who cannot use medicated decongestant sprays — for example, those with high blood pressure, heart conditions, or who are pregnant. If you have had recent nasal surgery or have a structural nasal condition, speak to your doctor before use.

What happens if I use too much Sterimar Hypertonic Nasal Spray?

Unlike medicated decongestant sprays, there is no risk of rebound congestion or dependency with Sterimar Hypertonic. Using it more frequently than recommended is unlikely to cause serious harm, but excessive use could lead to nasal dryness or mild irritation. Stick to the recommended dose of up to 4 times daily for best results.

What are alternatives to Sterimar Hypertonic Nasal Spray?

Alternatives include isotonic saline nasal sprays (such as Sterimar Isotonic) for milder congestion or daily nasal hygiene, decongestant sprays containing xylometazoline or oxymetazoline for short-term use, and nasal corticosteroid sprays for allergy-related congestion. You can explore a range of options in our ear, nose and throat collection. Your pharmacist can help you choose the most appropriate product for your symptoms.

How long can you use Sterimar Hypertonic Nasal Spray for?

Unlike medicated decongestant sprays, which should not be used for more than 7 days continuously, Sterimar Hypertonic does not cause rebound congestion and can be used for as long as symptoms persist. If your congestion has not improved after 10 days, or if you develop a fever, facial pain, or green/yellow discharge, see your GP to rule out a bacterial sinus infection.

Can I use Sterimar Hypertonic Nasal Spray alongside other cold and flu medicines?

Yes — because Sterimar Hypertonic contains no active pharmaceutical ingredients, it does not interact with other medicines. It can be used alongside oral decongestants, antihistamines, or pain relief products. In fact, using it before applying a medicated nasal spray can help clear the nasal passages and improve absorption of the other treatment. Browse our cold and flu range for complementary products.

What does the latest research say about hypertonic saline nasal sprays?

Clinical evidence supports the use of hypertonic saline nasal irrigation and sprays for reducing nasal congestion and improving quality of life in patients with sinusitis, rhinitis, and upper respiratory tract infections. Research published in peer-reviewed literature suggests hypertonic solutions may be more effective than isotonic saline at reducing mucosal oedema and clearing mucus. The NHS recommends saline nasal sprays as a first-line, drug-free option for managing nasal congestion.

How Should You Use Sterimar Hypertonic Congestion Relief Nasal Spray?

Using the spray correctly ensures you get the most out of each application. Always read the patient information leaflet before first use, and make sure the nozzle is clean before and after each session.

Follow these steps each time you use the spray:

What Is the Correct Dose of Sterimar Hypertonic Nasal Spray?

The dose varies slightly depending on age. Always use the lowest effective dose and do not exceed 4 applications per nostril per day unless advised by a healthcare professional.

When Is the Best Time to Use Sterimar Hypertonic Nasal Spray?

You can use this spray at any time of day when your nose feels blocked or congested. Many people find it most helpful first thing in the morning to clear overnight mucus build-up, and again before bed to help breathe more comfortably during sleep.

If you are also using a medicated nasal spray — such as a corticosteroid or antihistamine nasal spray — use Sterimar Hypertonic first to clear the nasal passages. This can help the medicated spray reach the nasal lining more effectively.

How Long Can You Use Sterimar Hypertonic Nasal Spray For?

Because this spray contains no active pharmaceutical ingredients, it does not carry the risk of rebound congestion (rhinitis medicamentosa) that is associated with medicated decongestant sprays. This means you can use it for as long as your symptoms persist without concern about dependency.

If your nasal congestion has not improved after 10 days of regular use, or if you develop additional symptoms such as a high temperature, facial pain, or discoloured nasal discharge, stop using the spray and consult your GP to rule out a bacterial infection or other underlying condition.

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 Sterimar Hypertonic Nasal Spray?

Because Sterimar Hypertonic contains no drugs or preservatives — only natural sea water — side effects are uncommon and generally mild. Most people tolerate it very well, even with regular use. The most frequently reported effects are related to the higher salt concentration coming into contact with sensitive nasal tissue.

  • Mild stinging or burning sensation in the nose immediately after application
  • Temporary increase in nasal discharge as mucus is loosened and begins to drain
  • Sneezing shortly after use

These effects typically resolve within a few minutes and do not usually require you to stop using the spray.

What Are the Less Common Side Effects of Sterimar Hypertonic Nasal Spray?

A small number of people may notice less common effects, particularly if they use the spray very frequently or if their nasal lining is already irritated from a cold or allergy.

  • Nasal dryness or a dry sensation at the back of the throat
  • Mild irritation or redness of the nasal lining
  • Discomfort if the nozzle is directed at the nasal septum rather than the outer nasal wall

Adjusting the angle of the nozzle slightly outward — away from the central septum — can help reduce localised irritation.

What Are the Serious Side Effects of Sterimar Hypertonic Nasal Spray?

Serious side effects are extremely rare with this product. However, if you experience any of the following after use, stop immediately and seek medical advice:

  • Severe nasal pain or significant nosebleed that does not settle
  • Signs of an allergic reaction, such as swelling of the face, lips, or throat, difficulty breathing, or a widespread rash
  • Worsening of nasal symptoms rather than improvement after several days of use

Allergic reactions to the ingredients in this spray are very rare, but they are possible. If you suspect an allergic reaction, seek urgent medical attention.

What Should You Do If You Experience Side Effects?

For mild side effects such as stinging or sneezing, no action is usually needed — these settle quickly on their own. If nasal dryness becomes bothersome, try reducing the frequency of use or switching to an isotonic saline spray for a few days. You should report any suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk, even if you are not certain the spray caused them.

Always speak to your pharmacist if you are unsure whether a symptom you are experiencing is related to this product. They can advise on whether to continue, adjust your use, or seek further medical assessment.

Can Sterimar Hypertonic Nasal Spray Interact With Other Medicines?

No known drug interactions have been identified for Sterimar Hypertonic Nasal Spray. Because it contains only sodium chloride and water — with no active pharmaceutical compounds — it does not interfere with the absorption, metabolism, or action of other medicines. It can safely be used alongside oral antihistamines, decongestants, corticosteroid nasal sprays, and antibiotics without concern about interactions.

If you are ever unsure about using this spray alongside a specific medication, your pharmacist is the best person to ask.

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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