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Opticrom Allergy Eye Drops - 10ml

Opticrom Allergy Eye Drops - 10ml

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  • ✔️ Relieves itchy, red, watery eyes caused by allergies
  • ✔️ Contains sodium cromoglicate 2% to stabilise mast cells
  • ✔️ Suitable for adults and children aged 6 and over
  • ✔️ Effective for both seasonal and perennial allergic conjunctivitis
  • ✔️ Preventative action builds with regular four-times-daily use

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What Are Opticrom Allergy Eye Drops?

 

If your eyes turn red, itchy, and watery every time pollen season arrives — or when you're around cats, dust, or other allergens — you'll know just how disruptive allergic conjunctivitis can be. Opticrom allergy eye drops offer a clinically established, over-the-counter solution for exactly this problem. Each 10ml bottle contains sodium cromoglicate 2%, a well-studied mast cell stabiliser that has been used to manage allergic eye symptoms for decades. Available from our eye care range at Cured Pharmacy, this product is suitable for adults and children aged 6 and over.

Allergic conjunctivitis affects a significant proportion of the UK population, particularly during spring and summer when airborne pollen counts are at their highest. The condition causes inflammation of the conjunctiva — the thin membrane covering the white of the eye — leading to that familiar combination of itching, redness, and watering. Opticrom is designed to be used regularly throughout the allergy season, not just when symptoms flare.

 

How Do Opticrom Allergy Eye Drops Work?

 

The active ingredient, sodium cromoglicate, works by stabilising mast cells in the conjunctival tissue. Mast cells are immune cells that, when triggered by an allergen, release histamine and other inflammatory mediators — the chemicals responsible for the itching, redness, and swelling you experience. By preventing mast cell degranulation, sodium cromoglicate stops this cascade before it starts.

  • Allergen (e.g. pollen, pet dander) contacts the eye surface
  • Sodium cromoglicate stabilises mast cells in the conjunctiva
  • Histamine release is inhibited
  • Inflammatory response is reduced or prevented
  • Symptoms — itching, redness, watering — are relieved

It's worth noting that Opticrom works best when used consistently and ideally started before allergen exposure begins. It is not a fast-acting antihistamine; rather, it builds a protective effect over time with regular use.

 

Who Should Use Opticrom Allergy Eye Drops?

 

Opticrom is suitable for a broad range of patients dealing with allergic eye symptoms. It is particularly useful for those who experience seasonal or perennial allergic conjunctivitis and want a non-drowsy, topical treatment option. If you're already managing hay fever with oral antihistamines or nasal sprays — available in our allergy and hay fever collection — adding Opticrom can provide targeted relief directly at the eye.

  • Adults and children aged 6 years and over
  • People with seasonal allergic conjunctivitis (hay fever-related eye symptoms)
  • Those with perennial allergic conjunctivitis triggered by dust mites, pet dander, or mould
  • Patients who prefer a preservative-containing topical eye treatment without systemic side effects

 

How Do Opticrom Eye Drops Compare to Other Allergy Eye Drops?

 

Feature Opticrom Allergy Eye Drops Antihistamine Eye Drops (e.g. Otrivine Antistin)
Active ingredient Sodium cromoglicate 2% Antazoline / xylometazoline
Mechanism Mast cell stabiliser (preventative) Antihistamine + decongestant (symptomatic relief)
Speed of action Builds over days with regular use Faster symptomatic relief
Suitable for long-term seasonal use Yes Short-term use recommended

 

How Should You Store Opticrom Allergy Eye Drops?

 

Store your bottle of Opticrom allergy eye drops below 25°C, away from direct sunlight. Once opened, the drops should be discarded after four weeks — even if liquid remains — to reduce the risk of eye infection from contamination. Always keep the cap tightly closed when not in use, and store out of reach of children.

Do not use the drops if the solution appears cloudy or discoloured, or if the expiry date on the packaging has passed. This product contains benzalkonium chloride as a preservative, which means soft contact lenses must be removed before instilling the drops. Wait at least 15 minutes before reinserting lenses.

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.

Opticrom Allergy Eye Drops 10ml specifications
Treatment category Allergic conjunctivitis / hay fever eye symptoms
Active ingredient Sodium cromoglicate 2% w/v
Mechanism of action Mast cell stabiliser — inhibits histamine release
Drug class Cromone / mast cell stabiliser
Route of administration Ophthalmic (topical eye drops)
Preparation Sterile aqueous eye drops solution
Pack size 10ml
Suitable for Adults and children aged 6 years and over
UK classification P (Pharmacy medicine)
Effective for Itchy, red, watery eyes due to allergies

Specifications of Opticrom Allergy Eye Drops 10ml

 

What Is Opticrom and What Is It Used For?

 

Opticrom Allergy Eye Drops contain sodium cromoglicate 2% w/v as the active ingredient. They are used to treat and prevent the symptoms of allergic conjunctivitis — an inflammation of the eye's outer membrane triggered by allergens such as pollen, house dust mites, animal dander, and mould spores. Symptoms typically include itching, redness, watering, and a gritty or burning sensation in the eyes.

The drops are classified as a Pharmacy (P) medicine in the UK, meaning they are available without a prescription but should be purchased from a registered pharmacy. They are suitable for adults and children aged 6 years and over. Opticrom allergy eye drops are particularly effective when used as a preventative measure throughout the allergy season rather than only when symptoms are already severe.

 

What Do You Need to Know Before Using Opticrom?

 

Before using these drops, read the following carefully. Certain conditions and circumstances mean Opticrom may not be appropriate for you, or you may need additional guidance from a healthcare professional.

Do not use Opticrom if you:

  • Are allergic to sodium cromoglicate or any other ingredient in the formulation (including benzalkonium chloride)
  • Have a known hypersensitivity to any component of the drops
  • Are under 6 years of age

Speak to your pharmacist or GP before use if you:

  • Are pregnant or breastfeeding
  • Wear soft (hydrophilic) contact lenses — benzalkonium chloride can be absorbed by soft lenses
  • Have an eye infection, as this will need separate treatment
  • Experience worsening symptoms or no improvement after a few days of use

Drug interactions:

  • No clinically significant drug interactions with sodium cromoglicate eye drops have been reported
  • If you are using other eye drops or eye ointments, leave at least 5 minutes between applications
  • Always inform your pharmacist of all medicines you are currently taking

 

How Should You Use Opticrom Allergy Eye Drops?

 

Always use Opticrom exactly as directed on the label or as advised by your pharmacist. Do not exceed the recommended dose. The drops are for use in the eyes only — never swallow them.

  1. Wash your hands thoroughly before handling the bottle
  2. If wearing soft contact lenses, remove them before applying the drops
  3. Tilt your head back slightly and gently pull down your lower eyelid to create a small pocket
  4. Hold the bottle above the eye and instil 1–2 drops into the pocket without touching the dropper tip to your eye or eyelid
  5. Close your eye gently for 1–2 minutes and press lightly on the inner corner of the eye to reduce drainage
  6. Repeat in the other eye if required
  7. Replace the cap immediately after use
  8. Wait at least 15 minutes before reinserting soft contact lenses
Indication Age Group Dose Frequency
Allergic conjunctivitis Adults and children aged 6+ 1–2 drops per affected eye 4 times daily

 

What Are the Possible Side Effects of Opticrom?

 

Like all medicines, Opticrom can cause side effects, although not everyone experiences them. Most side effects are mild and localised to the eye.

Common side effects:

  • Transient stinging or burning sensation immediately after instillation
  • Temporary blurred vision (avoid driving until vision clears)
  • Mild eye irritation

Less common side effects:

  • Eye redness or watering shortly after application
  • Sensitivity to light (photophobia)
  • Allergic reaction to the preservative benzalkonium chloride (rare)

If you experience a severe allergic reaction — including significant swelling, intense redness, or difficulty breathing — stop using the drops immediately and seek urgent medical attention. You can find further guidance on managing eye conditions through our broader eye care collection.

 

How Should You Store Opticrom Allergy Eye Drops?

 

  • Store below 25°C in a cool, dry place away from direct sunlight
  • Keep the bottle tightly closed when not in use
  • Discard the bottle 4 weeks after first opening, even if solution remains
  • Do not use after the expiry date printed on the label
  • Keep out of the reach and sight of children
  • Do not freeze
  • Do not use if the solution appears cloudy or discoloured

If you're managing multiple allergy symptoms alongside eye irritation, you may also find it helpful to explore our allergy and hay fever treatments for a more complete approach to seasonal allergy relief.

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 Opticrom allergy eye drops online in the UK?

You can buy Opticrom allergy eye drops directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for just £4.57 per 10ml bottle. No prescription is needed as it is an over-the-counter Pharmacy (P) medicine. Browse our full eye care range for related products.

How do Opticrom allergy eye drops work in the eye?

Opticrom contains sodium cromoglicate 2%, which works by stabilising mast cells in the conjunctiva — the membrane lining the eye. When an allergen like pollen triggers these cells, they would normally release histamine and cause itching and redness. Sodium cromoglicate prevents that release, stopping the allergic reaction before it takes hold.

How do I use Opticrom allergy eye drops step by step?

Wash your hands, remove soft contact lenses if worn, tilt your head back, and gently pull down your lower eyelid. Instil 1–2 drops into the pocket formed, close your eye gently for a minute or two, then replace the cap. Repeat four times daily in each affected eye, and wait 15 minutes before reinserting contact lenses.

How long does it take for Opticrom eye drops to start working?

Unlike antihistamine eye drops that act quickly, Opticrom works as a preventative treatment and builds its effect over several days of regular use. Some patients notice improvement within 2–3 days, but the full benefit is typically felt after 1–2 weeks of consistent four-times-daily dosing. Starting treatment before the allergy season begins gives the best results.

Can I use Opticrom eye drops with contact lenses?

You should not wear soft (hydrophilic) contact lenses while instilling Opticrom drops, as the preservative benzalkonium chloride can be absorbed into the lens material and may cause eye irritation. Always remove soft lenses before applying the drops and wait at least 15 minutes before putting them back in. Hard (rigid gas-permeable) lenses should also be removed prior to use.

What is the correct dose of Opticrom for adults and children?

The recommended dose for both adults and children aged 6 years and over is 1–2 drops instilled into each affected eye, four times daily. The drops should be used at regular intervals throughout the day. Do not exceed this dose unless directed by a healthcare professional.

Are Opticrom allergy eye drops safe to use during pregnancy?

Systemic absorption of sodium cromoglicate from eye drops is very low, but if you are pregnant or breastfeeding you should still consult your GP or pharmacist before using Opticrom. They can weigh up the potential benefits against any theoretical risks and advise on the most appropriate treatment for your situation.

What are the side effects of Opticrom allergy eye drops?

The most commonly reported side effects are a brief stinging or burning sensation immediately after instilling the drops, and temporary blurred vision. These are usually mild and pass within a few minutes. Less commonly, some people experience increased eye redness or sensitivity to light. Stop use and seek advice if you develop a more significant reaction.

What happens if I miss a dose of Opticrom eye drops?

If you forget a dose, apply it as soon as you remember — unless it is nearly time for your next scheduled dose, in which case simply skip the missed one. Do not apply a double dose to make up for a missed application. Consistent, regular use is important for Opticrom to work effectively as a preventative treatment.

How long can I use Opticrom allergy eye drops for?

Opticrom can be used throughout the allergy season, which for hay fever sufferers typically spans spring and summer. If your symptoms are perennial (year-round), longer-term use may be appropriate under pharmacist or GP guidance. Each bottle should be discarded four weeks after opening regardless of how much remains.

Who is eligible to use Opticrom allergy eye drops?

Opticrom is suitable for adults and children aged 6 years and over who have allergic conjunctivitis caused by pollen, dust mites, pet dander, or other allergens. It is not suitable for children under 6, or for anyone with a known allergy to sodium cromoglicate or benzalkonium chloride. Pregnant or breastfeeding individuals should seek professional advice first.

What are the alternatives to Opticrom allergy eye drops?

Alternatives include antihistamine eye drops such as those containing antazoline or olopatadine, which provide faster but shorter-term symptom relief. Oral antihistamines can also help with eye symptoms as part of broader hay fever management — you can explore options in our allergy and hay fever collection. Your pharmacist can help you choose the most suitable option based on your symptoms.

Can I use Opticrom eye drops alongside other hay fever medicines?

Yes, Opticrom eye drops can generally be used alongside oral antihistamines, nasal sprays, and other hay fever treatments. No clinically significant drug interactions with sodium cromoglicate eye drops have been reported. If you are using other eye drops at the same time, leave at least 5 minutes between applications to avoid diluting either product.

How should I store Opticrom allergy eye drops after opening?

Once opened, Opticrom should be stored below 25°C, away from direct sunlight, with the cap tightly replaced after each use. Crucially, the bottle must be discarded four weeks after first opening — even if solution remains — to prevent the risk of eye infection from microbial contamination. Never use the drops if the solution looks cloudy or discoloured.

What are the latest findings on sodium cromoglicate for allergic conjunctivitis?

Sodium cromoglicate has been used in ophthalmology for several decades and remains a well-established first-line option for allergic conjunctivitis in UK clinical practice. Current NHS and BNF guidance continues to support its use as a mast cell stabiliser for seasonal and perennial allergic eye disease. While newer antihistamine eye drops may offer faster relief, sodium cromoglicate is valued for its excellent safety profile and suitability for longer-term preventative use.

How Should You Use Opticrom Allergy Eye Drops?

Using Opticrom correctly makes a real difference to how well it works. Always wash your hands thoroughly before handling the bottle, and never allow the dropper tip to touch your eye, eyelid, or any other surface, as this can introduce bacteria into the solution.

What Is the Correct Dose of Opticrom Allergy Eye Drops?

The standard dose for adults and children aged 6 years and over is 1–2 drops into each affected eye, four times daily. Doses should be spaced evenly throughout the day to maintain a consistent protective effect in the eye.

When Is the Best Time to Use Opticrom Allergy Eye Drops?

For seasonal allergic conjunctivitis, ideally start using Opticrom a week or two before your typical allergy season begins — this gives the sodium cromoglicate time to build its protective effect before pollen counts rise. Space your four daily doses evenly, for example morning, midday, late afternoon, and evening, to maintain consistent coverage throughout the day.

If you know you'll be exposed to a specific allergen (such as visiting a home with pets), applying the drops 15–20 minutes beforehand can help reduce the severity of your reaction. Consistency is key — skipping doses reduces the preventative benefit significantly.

How Long Can You Use Opticrom Allergy Eye Drops For?

Opticrom can be used throughout the duration of your allergy season, which for hay fever sufferers in the UK typically runs from late March through to September. For perennial allergic conjunctivitis triggered by year-round allergens such as dust mites or pet dander, longer-term use may be appropriate — discuss this with your pharmacist or GP.

Remember that each bottle must be discarded four weeks after opening, regardless of how much solution remains. If your symptoms have not improved after a few weeks of regular use, or if they worsen at any point, seek advice from a healthcare professional rather than continuing treatment independently.

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

How Should You Use Opticrom Allergy Eye Drops?

Using Opticrom correctly makes a real difference to how well it works. Always wash your hands thoroughly before handling the bottle, and never allow the dropper tip to touch your eye, eyelid, or any other surface, as this can introduce bacteria into the solution.

What Is the Correct Dose of Opticrom Allergy Eye Drops?

The standard dose for adults and children aged 6 years and over is 1–2 drops into each affected eye, four times daily. Doses should be spaced evenly throughout the day to maintain a consistent protective effect in the eye.

When Is the Best Time to Use Opticrom Allergy Eye Drops?

For seasonal allergic conjunctivitis, ideally start using Opticrom a week or two before your typical allergy season begins — this gives the sodium cromoglicate time to build its protective effect before pollen counts rise. Space your four daily doses evenly, for example morning, midday, late afternoon, and evening, to maintain consistent coverage throughout the day.

If you know you'll be exposed to a specific allergen (such as visiting a home with pets), applying the drops 15–20 minutes beforehand can help reduce the severity of your reaction. Consistency is key — skipping doses reduces the preventative benefit significantly.

How Long Can You Use Opticrom Allergy Eye Drops For?

Opticrom can be used throughout the duration of your allergy season, which for hay fever sufferers in the UK typically runs from late March through to September. For perennial allergic conjunctivitis triggered by year-round allergens such as dust mites or pet dander, longer-term use may be appropriate — discuss this with your pharmacist or GP.

Remember that each bottle must be discarded four weeks after opening, regardless of how much solution remains. If your symptoms have not improved after a few weeks of regular use, or if they worsen at any point, seek advice from a healthcare professional rather than continuing treatment independently.

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

What Are the Most Common Side Effects of Opticrom Allergy Eye Drops?

Most people who use Opticrom tolerate it well, and side effects are generally mild and short-lived. The most frequently reported reaction is a brief stinging or burning sensation in the eye immediately after instilling the drops. This typically passes within a minute or two and is not a sign that the drops are harmful.

  • Transient stinging or burning sensation on instillation
  • Temporary blurred vision immediately after use
  • Mild eye irritation or discomfort
  • Increased watering of the eye shortly after application

What Are the Less Common Side Effects of Opticrom Eye Drops?

Less commonly, some people experience additional eye-related reactions. These are not dangerous in most cases but should be monitored. If any of the following persist or worsen, stop using the drops and consult your pharmacist or GP.

  • Redness of the eye or conjunctiva
  • Sensitivity to light (photophobia)
  • Itching or a gritty sensation that worsens rather than improves
  • Swelling of the eyelid

What Are the Serious Side Effects of Opticrom Allergy Eye Drops?

Serious side effects are rare but can occur. A small number of people may develop an allergic reaction to benzalkonium chloride, the preservative used in Opticrom. Signs of a significant allergic reaction include marked swelling of the eye or surrounding tissue, severe redness, intense pain, or any difficulty breathing. If you experience any of these symptoms, stop using the drops immediately and seek urgent medical attention or call 999.

If you develop signs of an eye infection — such as a yellow or green discharge, significant pain, or a sudden change in vision — do not continue using Opticrom without seeking medical advice first, as the drops do not treat infection.

What Should You Do If You Experience Side Effects?

For mild side effects such as brief stinging or temporary blurred vision, no action is usually needed beyond waiting a few minutes for the sensation to pass. Avoid driving or operating machinery until your vision has fully cleared after instilling the drops. If side effects are persistent, unusual, or causing you concern, speak to your pharmacist — they can advise whether you should continue, switch to an alternative, or see your GP.

You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

Can Opticrom Allergy Eye Drops Interact With Other Medicines?

No clinically significant drug interactions with sodium cromoglicate eye drops have been identified. However, if you are using any other eye drops or eye ointments at the same time, you should leave a gap of at least 5 minutes between applications to prevent one product diluting or washing out the other. Eye ointments should always be applied last. Always inform your pharmacist of all medicines — including over-the-counter products — that you are currently using.

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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