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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 hay fever
  • ✔️ Contains sodium cromoglicate 2% — clinically proven mast cell stabiliser
  • ✔️ Suitable for adults and children aged 6 years and over
  • ✔️ Prevents allergic eye symptoms with regular daily use
  • ✔️ Compact 10ml bottle — easy to carry during allergy season

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What Are Sodium Cromoglicate Eye Drops Used For?

 

If your eyes itch, water, and turn red every time pollen season arrives, you are far from alone. Allergic conjunctivitis affects millions of people in the UK each year, and finding a reliable, well-tolerated treatment makes a real difference to daily life. Sodium cromoglicate eye drops — sold under the brand name Opticrom — are one of the most widely recommended over-the-counter options for managing this condition. Each 10ml bottle contains a 2% solution of sodium cromoglicate, a mast cell stabiliser that tackles the root cause of allergic eye symptoms rather than simply masking them. You can browse the full range of eye care products at Cured Pharmacy if you need additional support alongside these drops.

Opticrom Allergy Eye 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 and over, making them a practical choice for families dealing with seasonal or perennial allergic conjunctivitis.

 

How Do Opticrom Allergy Eye Drops Work?

 

The active ingredient, sodium cromoglicate 2%, belongs to a class of medicines called mast cell stabilisers. When your eyes are exposed to an allergen — pollen, pet dander, dust mites — mast cells in the conjunctiva release histamine and other inflammatory mediators. It is these chemicals that cause the familiar itching, redness, and watering. Sodium cromoglicate works by stabilising the mast cell membrane, preventing it from releasing those chemicals in the first place.

  • Allergen enters the eye and binds to IgE antibodies on mast cells
  • Sodium cromoglicate stabilises the mast cell membrane
  • Histamine and inflammatory mediators are not released
  • Allergic symptoms — itching, redness, watering — are reduced or prevented

Because it works preventatively, Opticrom is most effective when used regularly throughout the allergy season, even on days when symptoms feel mild. Starting treatment a week or two before your typical allergy season begins can give you a head start.

 

Who Should Use Opticrom Allergy Eye Drops?

 

These drops are designed for anyone experiencing the eye symptoms of an allergic reaction. Whether your triggers are seasonal (like grass or tree pollen) or year-round (like pet hair or house dust mites), Opticrom can help manage the ocular component of your allergy. If you are already managing other allergy symptoms such as a runny nose or sneezing, you might also want to explore the wider range of allergy and hay fever treatments available at Cured Pharmacy.

  • Adults and children aged 6 years and over with allergic conjunctivitis
  • People with seasonal hay fever affecting the eyes
  • Those with perennial (year-round) allergic eye symptoms
  • Patients who prefer a preservative-containing drop and do not wear soft contact lenses during treatment

 

How Does Opticrom Compare to Other Allergy Eye Drops?

 

Feature Opticrom (Sodium Cromoglicate 2%) Otrivine Antistin (Antazoline/Xylometazoline)
Mechanism Mast cell stabiliser (preventative) Antihistamine + decongestant (symptomatic relief)
Onset of action Days to 2 weeks with regular use Rapid (within minutes)
Suitable for long-term use Yes No (max 7 days recommended)
Age suitability (OTC) 6 years and over 12 years and over

 

How Should You Store Opticrom Allergy Eye Drops?

 

Store Opticrom Allergy Eye Drops below 25°C, away from direct sunlight. Once opened, the bottle should be discarded after 4 weeks — even if solution remains — to reduce the risk of eye infection from contamination. Keep the bottle tightly closed when not in use and always keep medicines out of the reach and sight of children.

Do not use the drops if the solution appears cloudy or discoloured, or if the expiry date on the packaging has passed. If you are unsure whether sodium cromoglicate eye drops are right for you, speak to your pharmacist before starting treatment.

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
Mechanism of action Mast cell stabiliser — prevents histamine release
Effective for Itchy, red, watery eyes due to allergy
Suitable for Adults and children aged 6 years and over
Active ingredient Sodium cromoglicate 2% w/v
Pack size 10ml
Strength 2% w/v
UK classification Pharmacy (P) medicine
Drug class Mast cell stabiliser
Preparation Sterile aqueous eye drops solution
Route of administration Ophthalmic (topical, into the eye)

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 — the inflammation of the thin membrane covering the white of the eye and the inner eyelids that occurs as a result of an allergic reaction. Common triggers include grass pollen, tree pollen, animal dander, and house dust mites. Symptoms typically include itching, redness, watering, and a gritty or burning sensation in the eyes. The NHS recognises sodium cromoglicate as an effective treatment for allergic eye conditions, and it is widely used during hay fever season across the UK.

 

What Do You Need to Know Before Using Opticrom?

 

Before using these drops, it is important to check whether they are suitable for you. Do not use Opticrom if any of the following apply:

  • You are allergic to sodium cromoglicate or any other ingredient in the formulation (including benzalkonium chloride)
  • You are under 6 years of age (use only under medical supervision)
  • You have a current eye infection — treat the infection first before starting allergy drops
  • You wear soft contact lenses — benzalkonium chloride can be absorbed by soft lenses and cause irritation

Speak to your pharmacist or GP before using Opticrom if you are pregnant or breastfeeding. Although topical use means systemic absorption is minimal, it is always wise to seek professional advice during pregnancy. There are no clinically significant drug interactions known for topical sodium cromoglicate, but always mention all medicines you are taking to your pharmacist.

  • No significant interactions with oral antihistamines or nasal corticosteroids have been reported
  • Avoid concurrent use with other eye drops unless advised by a healthcare professional — allow at least 5 minutes between different eye preparations

 

How Should You Use Opticrom?

 

Using eye drops correctly makes a real difference to how well they work. Follow these steps each time you apply Opticrom:

  1. Wash your hands thoroughly with soap and water
  2. Remove soft contact lenses before applying the drops
  3. Tilt your head back slightly and look up
  4. Gently pull down your lower eyelid to create a small pocket
  5. Hold the dropper above the eye and instil one to two drops into the pocket — do not let the tip touch your eye or eyelid
  6. Close your eye gently and press lightly on the inner corner for one minute to reduce drainage
  7. Repeat for the other eye if needed
  8. Replace the cap immediately after use
Indication Age Group Dose Frequency
Allergic conjunctivitis Adults and children 6+ 1–2 drops per eye 4 times daily
Allergic conjunctivitis Under 6 years Not recommended without medical advice

For best results, use the drops regularly throughout the allergy season — even when your symptoms feel manageable. Sodium cromoglicate eye drops work preventatively, so consistency is key. If you are also managing nasal hay fever symptoms, you may find it helpful to look at the broader range of allergy and hay fever treatments available alongside these drops.

 

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 immediately after instillation
  • Temporary blurred vision (avoid driving until vision clears)
  • Mild eye irritation

Less common side effects:

  • Watering or redness of the eye shortly after application
  • Sensitivity to light (photophobia)
  • Eyelid swelling or puffiness

If you experience severe eye pain, a sudden change in vision, or symptoms that worsen rather than improve after a few days of use, stop using the drops and seek medical advice promptly. Allergic reactions to sodium cromoglicate itself are rare but possible — signs include significant swelling, rash around the eye, or difficulty breathing, which require immediate medical attention.

 

How Should You Store Opticrom?

 

Correct storage keeps the drops safe and effective for the duration of use. Follow these guidelines:

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

If you need to dispose of unused drops, return them to your local pharmacy — do not pour them down the sink or throw them in household waste. For anyone managing multiple eye conditions or looking for additional eye care products, Cured Pharmacy stocks a range of options to suit different needs.

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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 10ml directly from Cured Pharmacy for £5.79, with no prescription required. They are a Pharmacy (P) medicine, so purchasing from a GPhC-registered online pharmacy like Cured ensures you receive genuine, properly stored product. Simply add to your basket and select your preferred delivery option at checkout.

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 thin membrane lining the eye. When allergens like pollen enter the eye, mast cells would normally release histamine and other chemicals that cause itching, redness, and watering; sodium cromoglicate prevents this release. Because it is a preventative treatment rather than a fast-acting one, regular use throughout the allergy season gives the best results.

How do I use Opticrom Allergy Eye Drops step by step?

Follow these steps for correct application:

  1. Wash your hands before touching the bottle or your eyes
  2. Tilt your head back and pull down your lower eyelid gently
  3. Instil one to two drops into the pocket formed, without touching the dropper tip to your eye
  4. Close your eye gently and press the inner corner for one minute
  5. Repeat for the other eye if required, then replace the cap

Remove soft contact lenses before application and wait at least 15 minutes before reinserting them.

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

The recommended dose for adults and children aged 6 years and over is one to two drops in each affected eye, four times daily. Doses should be spaced evenly throughout the day — for example, morning, midday, late afternoon, and evening. Do not exceed this dose unless directed by a healthcare professional.

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

Opticrom does not provide instant relief in the way that antihistamine eye drops do — it typically takes a few days to two weeks of regular use before you notice the full benefit. This is because sodium cromoglicate works by preventing the allergic response rather than blocking symptoms that have already started. Starting treatment before your allergy season begins can help you get ahead of symptoms.

Can I use Opticrom eye drops with contact lenses?

You should not wear soft contact lenses while instilling Opticrom, as the preservative benzalkonium chloride can be absorbed into soft lens material and may cause eye irritation. Remove your 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 application — check with your optician if you are unsure.

What are the side effects of Opticrom Allergy Eye Drops?

Most side effects are mild and temporary. Commonly reported effects include:

  • Brief stinging or burning immediately after instillation
  • Temporary blurred vision
  • Mild eye irritation or watering

If you experience severe pain, significant vision changes, or worsening redness, stop use and speak to your pharmacist or GP promptly.

Are Opticrom 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 always seek advice from your GP or pharmacist before starting any new medicine. They can weigh up the potential benefits against any theoretical risks and recommend the most appropriate option for you. Do not self-treat without professional guidance during pregnancy.

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 hay fever, pet dander, dust mites, or other allergens. It is not recommended for children under 6 without medical supervision, and it should not be used by anyone with a known allergy to sodium cromoglicate or benzalkonium chloride. If you have an active eye infection, treat that first before starting Opticrom.

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

If you forget a dose, apply the drops as soon as you remember — unless it is nearly time for your next scheduled dose, in which case simply skip the missed one and carry on as normal. Do not apply a double dose to make up for a missed one. Consistent, regular use is important for Opticrom to work effectively, so try to build it into your daily routine.

How long can you use Opticrom Allergy Eye Drops for?

Opticrom can be used throughout the allergy season, which for hay fever sufferers in the UK typically runs from late March to September. If your symptoms are perennial (year-round), longer-term use may be appropriate — but speak to your GP or pharmacist if you have been using the drops for more than three months without review. The bottle must be discarded four weeks after opening regardless of how much solution remains.

What are the alternatives to Opticrom Allergy Eye Drops?

Several alternatives are available for allergic conjunctivitis, depending on how quickly you need relief:

  • Antihistamine eye drops (e.g. azelastine, ketotifen) — faster-acting but generally for short-term use
  • Otrivine Antistin — combines an antihistamine with a decongestant for rapid symptom relief
  • Oral antihistamines — can help both nasal and eye symptoms simultaneously

You can explore a wider selection of allergy and hay fever treatments at Cured Pharmacy to find the right combination for your needs.

Can I use Opticrom alongside other hay fever medicines?

Yes — Opticrom eye drops can generally be used alongside oral antihistamines or nasal corticosteroid sprays, as there are no clinically significant interactions reported for topical sodium cromoglicate. If you are using more than one type of eye drop, leave at least five minutes between each preparation to prevent one washing the other out. Always mention all medicines you are taking to your pharmacist.

How should I store Opticrom Allergy Eye Drops after opening?

Once opened, Opticrom should be stored below 25°C, away from direct sunlight, and used within four weeks — after which the bottle must be discarded even if solution remains. This four-week rule is important to prevent bacterial contamination of the eye. Keep the cap tightly closed between uses and store the bottle out of reach of children.

What is the latest evidence on sodium cromoglicate eye drops for allergic conjunctivitis?

Sodium cromoglicate has been used clinically for decades and remains a well-established, evidence-based treatment for allergic conjunctivitis. It is listed in the British National Formulary (BNF) as a recommended option for this condition, and the NHS recognises it as an effective preventative treatment. While newer antihistamine eye drops may offer faster symptom relief, sodium cromoglicate is valued for its excellent safety profile and suitability for long-term seasonal use. You can find further eye care products at Cured Pharmacy to complement your allergy management plan.

How Should You Use Opticrom Allergy Eye Drops?

Getting the technique right really does make a difference to how well these drops work. Before you start, always wash your hands thoroughly with soap and water. If you wear soft contact lenses, remove them before applying the drops and wait at least 15 minutes before reinserting them.

Follow these steps each time you apply Opticrom:

If you are using any other eye drops at the same time, leave at least five minutes between each preparation so that one does not wash the other out before it has had time to work.

What Is the Correct Dose of Opticrom Allergy Eye Drops?

The dose is the same for adults and children aged 6 and over. Always follow the dosage instructions on the packaging or as directed by your pharmacist. Do not use more drops than recommended, as this will not improve the effect and may cause unnecessary irritation.

Space your four daily doses as evenly as possible throughout the day — for example, on waking, at midday, in the late afternoon, and before bed. Consistent spacing helps maintain a steady protective effect in the eye.

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

Because sodium cromoglicate works preventatively, timing matters. Ideally, start using Opticrom one to two weeks before your allergy season typically begins — this gives the medicine time to build up its protective effect before you are heavily exposed to allergens. During the season, apply your drops at regular intervals throughout the day rather than waiting until symptoms flare up.

If you know you are going to be exposed to a specific trigger — spending time outdoors on a high pollen day, visiting a friend with a cat — applying your drops beforehand can help reduce the severity of your reaction. Do not skip doses on days when symptoms feel mild, as this is when the drops are working as intended.

How Long Can You Use Opticrom Allergy Eye Drops For?

Opticrom can be used throughout the allergy season, which for hay fever sufferers in the UK typically runs from late March through to September. For those with perennial (year-round) allergic conjunctivitis, longer-term use may be appropriate under the guidance of a GP or pharmacist. The drops have a well-established safety profile and are not associated with the rebound effects sometimes seen with decongestant eye drops.

Remember that once opened, the bottle must be discarded after four weeks — even if solution remains — to prevent the risk of eye infection from contamination. If your symptoms have not improved after two weeks of regular use, or if they worsen at any point, seek advice from your pharmacist or GP before continuing.

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 Opticrom Allergy Eye Drops?

Most people who use Opticrom Allergy Eye Drops tolerate them very well. The most frequently reported side effects are localised to the eye and are usually brief. They tend to occur immediately after instillation and resolve within a few minutes.

  • Transient stinging or burning sensation in the eye immediately after applying the drops
  • Temporary blurred vision — avoid driving or operating machinery until your vision clears
  • Mild eye irritation or a gritty feeling
  • Increased watering of the eye shortly after application

These effects are generally mild and short-lived. If the stinging is particularly uncomfortable, try storing the bottle at room temperature rather than in a cool place, as cold drops can sometimes intensify the sensation.

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

Less commonly, some people may notice other effects around the eye area. These are not experienced by the majority of users but are worth being aware of before you start treatment.

  • Redness of the eye or conjunctiva following application
  • Sensitivity to light (photophobia)
  • Puffiness or swelling of the eyelids
  • Dry eye sensation between doses

If any of these effects persist or feel particularly bothersome, speak to your pharmacist. They can advise whether to continue treatment or consider an alternative approach.

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

Serious side effects with Opticrom are rare, but you should be aware of the signs that warrant prompt medical attention. An allergic reaction to sodium cromoglicate itself or to the preservative benzalkonium chloride is uncommon but possible.

Seek immediate medical help if you experience any of the following:

  • Severe eye pain that does not settle quickly after instillation
  • Sudden or significant change in vision
  • Marked swelling of the eyelids, face, or lips
  • Skin rash or hives around the eye area
  • Difficulty breathing — this may indicate a systemic allergic reaction and requires emergency care

Stop using the drops immediately if you suspect a serious reaction and contact your GP or call 111 for guidance.

What Should You Do If You Experience Side Effects?

For mild side effects such as brief stinging or temporary blurred vision, no specific action is usually needed — simply wait a few minutes for the sensation to pass. Make sure you are applying the drops correctly, as touching the dropper tip to the eye can introduce irritants and worsen discomfort.

If side effects are persistent, worsening, or affecting your daily life, speak to your pharmacist before your next dose. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. This helps regulators monitor the safety of medicines in real-world use.

Can Opticrom Allergy Eye Drops Interact With Other Medicines?

No clinically significant drug interactions have been reported for topically applied sodium cromoglicate. Because the drops act locally in the eye and systemic absorption is minimal, they are unlikely to interact with oral medicines such as antihistamines, nasal corticosteroids, or other allergy treatments.

However, if you are using more than one type of eye drop, always leave at least five minutes between each preparation. This prevents one drop from diluting or washing out the other before it has had time to work. Always inform your pharmacist of all medicines you are currently taking — including over-the-counter products and supplements — so they can check for any potential concerns specific to your situation.

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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