Skip to product information
1 of 1

  • Images are for illustration purposes only

Optrex Hayfever Relief 2% w/v Eye Drops 10ml

Optrex Hayfever Relief 2% w/v Eye Drops 10ml

  • 1. Ozempic®️-equivalent therapy now available for weight management
  • 2. Average weight loss of 17%, with 1 in 3 patients achieving over 20%
  • 3. May help reduce osteoarthritis-related pain
  • 4. Wegovy®️ is not expected to impact the effectiveness of oral contraceptives
  • 5. Supports cardiovascular risk reduction
  • 6. Over 22 million patients treated with semaglutide-based therapies since 2018

  • ✔️ Relieves itchy, red, watery eyes caused by hay fever
  • ✔️ Contains sodium cromoglicate 2% w/v, a clinically proven mast cell stabiliser
  • ✔️ Suitable for adults and children aged 6 years and over
  • ✔️ Prevents allergic eye reactions when used regularly throughout pollen season
  • ✔️ Compact 10ml bottle — easy to carry during high-pollen days

Price Checker

Regular price £6.49
Sale price £6.49 £4.99
Sale Sold out
  • Lowest price guarantee
  • Includes FREE private prescription
View full details

 

What Are Hayfever Eye Drops and How Do They Help?

 

If your eyes turn red, itchy, and watery every spring and summer, you are not alone. Allergic conjunctivitis — the eye component of hay fever — affects a significant proportion of the UK population each year. Hayfever eye drops like Optrex Hayfever Relief 2% w/v Eye Drops offer targeted relief directly at the site of the problem, rather than relying solely on oral antihistamines that may not fully address eye symptoms. You can browse our full range of eye care products if you need additional support alongside these drops.

Optrex Hayfever Relief Eye Drops contain sodium cromoglicate 2% w/v as the active ingredient. Sodium cromoglicate is a well-established, clinically recognised mast cell stabiliser that has been used in eye care for decades. It is available over the counter in the UK without a prescription, making it a convenient first-line option for managing seasonal allergic eye symptoms.

 

How Do Optrex Hayfever Relief Eye Drops Work?

 

The mechanism behind these drops is straightforward but effective. When allergens such as grass pollen, tree pollen, or dust mite particles come into contact with the surface of your eye, they trigger mast cells in the conjunctiva to release histamine and other inflammatory mediators. It is this release that causes the familiar itching, redness, and watering.

  • Sodium cromoglicate stabilises mast cell membranes in the conjunctiva.
  • It prevents mast cells from degranulating — that is, from releasing histamine and other chemicals.
  • With regular use, the inflammatory cascade is interrupted before symptoms can fully develop.
  • Unlike antihistamine drops, it works best as a preventative treatment rather than an immediate rescue remedy.

This is why consistent, regular use throughout the pollen season tends to give better results than using the drops only when symptoms are already severe.

 

Who Should Use Optrex Hayfever Relief Eye Drops?

 

These drops are suitable for adults and children aged 6 years and over who experience itchy, red, or watery eyes as part of their hay fever or other seasonal allergic reactions. They are particularly useful if oral antihistamines alone are not fully controlling your eye symptoms. If you are also managing nasal or other allergy symptoms, you may find it helpful to explore our wider allergy and hay fever range alongside these drops.

  • Adults with seasonal allergic conjunctivitis triggered by pollen.
  • Children aged 6 and over (under medical supervision for younger children).
  • People who find oral antihistamines insufficient for eye symptom control.
  • Those who prefer a topical, targeted approach to eye allergy relief.

 

How Do Optrex Hayfever Relief Drops Compare to Antihistamine Eye Drops?

 

Feature Optrex Hayfever Relief 2% (Sodium Cromoglicate) Antihistamine Eye Drops (e.g. Azelastine)
Mechanism Mast cell stabiliser — prevents histamine release Blocks histamine receptors directly
Speed of action Builds up over several days of regular use Faster onset — works within minutes
Best use Preventative, regular seasonal use Acute or on-demand symptom relief
OTC availability in UK Yes Yes (some formulations)

 

How Should You Store Optrex Hayfever Relief Eye Drops?

 

Proper storage keeps the drops safe and effective throughout the season. Store the bottle below 25°C and keep it away from direct sunlight. Do not refrigerate. Once opened, the drops should be discarded after 28 days — even if liquid remains — to reduce the risk of contamination and infection. Write the opening date on the bottle as a reminder.

These hayfever eye drops are for external ophthalmic use only. Never swallow the solution. Keep out of reach of children. If you wear soft contact lenses, remove them before instilling the drops and wait at least 30 minutes before reinserting.

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.

Optrex Hayfever Relief 2% w/v Eye Drops 10ml specifications
Treatment category Allergic conjunctivitis / Hay fever eye relief
Active ingredient Sodium cromoglicate 2% w/v
Mechanism of action Mast cell stabiliser
Effective for Itchy, red, watery eyes due to allergic conjunctivitis
Suitable for Adults and children aged 6 years and over
Pack size 10ml
Strength 2% w/v
UK classification General Sale List (GSL) / Pharmacy (P) medicine
Drug class Mast cell stabiliser (cromone)
Preparation Sterile aqueous eye drops solution
Route of administration Ophthalmic (topical, into the eye)

Specifications of Optrex Hayfever Relief 2% w/v Eye Drops 10ml

 

What Is Optrex Hayfever Relief and What Is It Used For?

 

Optrex Hayfever Relief 2% w/v Eye Drops are a topical ophthalmic preparation used to relieve and prevent the eye symptoms associated with hay fever and seasonal allergic conjunctivitis. The active ingredient, sodium cromoglicate 2% w/v, is a mast cell stabiliser that has been used in the management of allergic eye conditions for many years. It is licensed for over-the-counter use in the UK and is suitable for adults and children aged 6 years and over.

Common symptoms it addresses include itching, redness, watering, and a gritty or burning sensation in the eyes — all of which are caused by the body's allergic response to airborne allergens such as grass pollen, tree pollen, and mould spores. These drops work best when used regularly throughout the allergy season rather than only during acute flare-ups.

 

What Do You Need to Know Before Using Optrex Hayfever Relief?

 

Before using these drops, read the following carefully. There are certain situations where you should not use them, or where you should seek advice first.

Do not use these drops if you:

  • Are allergic to sodium cromoglicate or any other ingredient in the formulation.
  • Are wearing soft (hydrophilic) contact lenses — remove lenses before use.
  • Have been advised by a doctor not to use this type of product.

Speak to your pharmacist or GP before use if you:

  • Are pregnant or breastfeeding — seek medical advice before using any eye medication.
  • Have a current eye infection, as this product does not treat infections.
  • Are using any other eye drops or eye ointments at the same time.
  • Have a child under 6 years old — use in this age group requires medical supervision.

Drug interactions:

  • No clinically significant interactions have been reported with topical sodium cromoglicate at this concentration.
  • If using multiple eye preparations, allow at least 5 minutes between instillations to prevent dilution and washout.

 

How Should You Use Optrex Hayfever Relief Eye Drops?

 

Always use these drops exactly as directed on the label or as advised by your pharmacist. Do not exceed the recommended dose. If you are unsure, ask your pharmacist for guidance — they are well placed to help you get the most from your treatment.

  1. Wash your hands thoroughly before handling the bottle.
  2. Tilt your head back slightly and look upward.
  3. Gently pull down your lower eyelid to create a small pocket.
  4. Hold the dropper tip close to your eye without touching it.
  5. Squeeze one to two drops into the pocket formed by the lower eyelid.
  6. Close your eye gently and blink once or twice to distribute the drops.
  7. Repeat in the other eye if required.
  8. Replace the cap immediately after use.
Indication Age Group Dose Frequency
Allergic conjunctivitis / hay fever Adults and children aged 6+ 1–2 drops per affected eye 4 times daily
Allergic conjunctivitis / hay fever Children under 6 Only under medical supervision As directed by doctor

For best results, begin using the drops a few days before the pollen season starts if possible. You can also find complementary products in our allergy and hay fever collection to help manage other symptoms alongside your eye treatment.

 

What Are the Possible Side Effects of Optrex Hayfever Relief?

 

Like all medicines, Optrex Hayfever Relief Eye Drops 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 lasting a few minutes after use.
  • Mild eye irritation or watering shortly after application.

Less common side effects:

  • Redness of the eye or eyelid.
  • Dry eye sensation.
  • Hypersensitivity reactions — stop use and seek medical advice if you develop swelling, severe redness, or a rash around the eye.

If you experience any severe or persistent side effects, stop using the drops and consult your pharmacist or GP. Do not drive or operate machinery if your vision is temporarily blurred after use.

 

How Should You Store Optrex Hayfever Relief Eye Drops?

 

Correct storage is important to maintain the safety and effectiveness of the drops. If you are managing multiple health products at home, our eye care collection includes further guidance on related products.

  • Store below 25°C in a cool, dry place.
  • Do not refrigerate or freeze.
  • Keep away from direct sunlight and heat sources.
  • Discard the bottle 28 days after first opening, even if solution remains.
  • Keep the bottle tightly closed when not in use.
  • Keep out of the sight and reach of children.
  • Do not use after the expiry date printed on the bottle and carton.

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 Optrex Hayfever Relief Eye Drops online in the UK?

You can buy Optrex Hayfever Relief 2% w/v Eye Drops online from Cured Pharmacy for £6.49, with delivery available across the UK. No prescription is required as these are an over-the-counter medicine. You can also browse our full eye care range for related products.

How do Optrex Hayfever Relief Eye Drops work in the eye?

The active ingredient, sodium cromoglicate 2% w/v, stabilises mast cells in the conjunctiva, preventing them from releasing histamine and other inflammatory chemicals when exposed to allergens like pollen. This stops the allergic reaction that causes itching, redness, and watering. It works best as a preventative treatment used regularly throughout the hay fever season.

How do I use Optrex Hayfever Relief Eye Drops step by step?

Wash your hands first, then tilt your head back and gently pull down your lower eyelid to form a small pocket. Instil one to two drops into each affected eye, close your eye gently, and blink once or twice. Replace the cap immediately and avoid touching the dropper tip to your eye or any surface to prevent contamination.

How many times a day should I use Optrex Hayfever Relief Eye Drops?

The recommended dose is one to two drops in each affected eye, four times daily. Space the doses evenly throughout the day for consistent protection. Using them regularly — even on days when symptoms feel mild — gives the best preventative effect over the season.

How long does it take for Optrex Hayfever Relief Eye Drops to work?

Sodium cromoglicate is a mast cell stabiliser, so it builds up its protective effect over several days of regular use rather than providing instant relief. Some people notice an improvement within a few days, but the full benefit is typically felt after consistent use over one to two weeks. Starting treatment before the pollen season begins can help maximise its effectiveness.

Can I wear contact lenses when using Optrex Hayfever Relief Eye Drops?

You should not instil these drops while wearing soft (hydrophilic) contact lenses, as the preservative in the drops can be absorbed by soft lens material and cause irritation. Remove your soft lenses before applying the drops and wait at least 30 minutes before reinserting them. Hard (rigid gas-permeable) lenses should also be removed before use — check with your optician if unsure.

What are the side effects of Optrex Hayfever Relief Eye Drops?

The most commonly reported side effects are a brief stinging or burning sensation immediately after instillation and temporary blurred vision, both of which usually resolve within a few minutes. Less commonly, some people experience mild eye redness or irritation. If you develop severe redness, swelling, or a rash around the eye, stop using the drops and seek medical advice promptly.

Are Optrex Hayfever Relief Eye Drops safe during pregnancy?

If you are pregnant or breastfeeding, you should speak to your GP or pharmacist before using any eye medication, including these drops. While topical sodium cromoglicate has limited systemic absorption, it is always best to seek professional advice before using medicines during pregnancy. Your healthcare provider can help you weigh up the benefits and any potential risks.

Can children use Optrex Hayfever Relief Eye Drops?

These drops are suitable for children aged 6 years and over at the same dose as adults — one to two drops in each affected eye, four times daily. For children under 6 years, use is only recommended under medical supervision. Always supervise young children when applying eye drops and consult your pharmacist if you have any concerns about suitability.

What happens if I miss a dose of Optrex Hayfever Relief 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. Do not double up doses to compensate. Consistent daily use is important for maintaining the preventative effect of sodium cromoglicate throughout the allergy season.

How long can I use Optrex Hayfever Relief Eye Drops for?

These drops can be used throughout the hay fever season, which in the UK typically runs from late March to September depending on the pollen type you react to. Once opened, the bottle must be discarded after 28 days regardless of how much solution remains. If your symptoms persist beyond the expected season or worsen, speak to your GP or pharmacist.

What are the alternatives to Optrex Hayfever Relief Eye Drops?

Alternatives include antihistamine eye drops such as azelastine (Optilast) or olopatadine, which act more quickly for immediate symptom relief by blocking histamine receptors directly. 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 advise on the most appropriate choice based on your symptom pattern.

Can I use Optrex Hayfever Relief Eye Drops with other eye drops?

Yes, but you should leave at least 5 minutes between instilling different eye preparations to prevent one washing out the other before it has been absorbed. Always tell your pharmacist about any other eye drops or eye ointments you are using. If you are using an eye ointment as well, apply the drops first and the ointment last.

Do Optrex Hayfever Relief Eye Drops treat eye infections?

No — these drops are specifically for allergic conjunctivitis caused by hay fever and do not have any antibacterial or antiviral properties. If your eye is producing a yellow or green discharge, is very painful, or your vision is affected, these symptoms may indicate an infection rather than an allergy. In that case, stop using the drops and see your GP or pharmacist promptly.

What is the latest evidence on sodium cromoglicate eye drops for hay fever?

Sodium cromoglicate has been used in the management of allergic conjunctivitis for several decades and remains a recommended first-line topical option in UK clinical guidance. It is well tolerated with a good safety profile for long-term seasonal use. While newer antihistamine eye drops may offer faster onset of action, sodium cromoglicate continues to be widely used due to its established efficacy and low risk of side effects.

How Should You Use Optrex Hayfever Relief Eye Drops?

Using these drops correctly makes a real difference to how well they work. Always wash your hands thoroughly before handling the bottle, and make sure the dropper tip does not touch your eye, eyelid, or any other surface — this prevents contamination and keeps the drops sterile for the full 28 days after opening.

What Is the Correct Dose of Optrex Hayfever Relief Eye Drops?

The dose is the same for adults and children aged 6 and over. Consistent, regular dosing throughout the allergy season is key — sodium cromoglicate works by building up a protective effect over time, so skipping doses reduces its effectiveness. Always follow the label instructions and do not exceed the recommended dose.

When Is the Best Time to Use Optrex Hayfever Relief Eye Drops?

Ideally, start using the drops a few days before the pollen season begins — this gives the sodium cromoglicate time to establish its protective effect before your eyes are exposed to allergens. During the season, space your four daily doses evenly throughout the day, for example morning, midday, late afternoon, and evening. If you know you will be spending time outdoors in high-pollen conditions, applying a dose beforehand can help reduce the severity of your reaction.

Avoid using the drops immediately before bed if you find the temporary blurring affects your comfort. There is no strict requirement to take them at the same time each day, but a consistent routine helps you remember all four doses.

How Long Can You Use Optrex Hayfever Relief Eye Drops For?

These drops can be used throughout the hay fever season, which in the UK typically runs from late March through to September, depending on which pollens trigger your symptoms. Once you open the bottle, it must be discarded after 28 days — even if solution remains — to reduce the risk of eye infection from microbial contamination. If your symptoms continue beyond the expected season, or if they worsen despite regular use, speak to your GP or pharmacist for further assessment.

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

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

What Are the Most Common Side Effects of Optrex Hayfever Relief Eye Drops?

Most people tolerate Optrex Hayfever Relief Eye Drops well, and side effects are generally mild and short-lived. The most frequently reported effects occur immediately after instillation and resolve on their own within a few minutes.

  • Transient stinging or burning sensation in the eye immediately after applying the drops.
  • Temporary blurred vision lasting a few minutes after instillation.
  • Mild watering of the eye shortly after use.

These effects are not usually a reason to stop treatment. If the stinging is particularly uncomfortable, try keeping the bottle at room temperature before use — cold drops can sometimes feel more irritating.

What Are the Less Common Side Effects of Optrex Hayfever Relief Eye Drops?

Less commonly, some people experience side effects that persist beyond the initial few minutes after application. These are still generally mild but are worth monitoring, particularly if they do not improve with continued use.

  • Redness of the eye or surrounding eyelid skin.
  • A dry or gritty sensation in the eye.
  • Mild eyelid swelling.
  • Increased sensitivity to light (photophobia).

If any of these persist or worsen, stop using the drops and speak to your pharmacist or GP. Do not drive or operate machinery if your vision remains blurred after use.

What Are the Serious Side Effects of Optrex Hayfever Relief Eye Drops?

Serious side effects with topical sodium cromoglicate are rare, but you should be aware of the signs of a hypersensitivity reaction. Although uncommon, some individuals may develop an allergic response to the active ingredient or to one of the excipients in the formulation.

  • Severe redness, swelling, or pain in or around the eye.
  • A rash or hives on the skin around the eye or face.
  • Significant worsening of eye symptoms after starting treatment.
  • Any signs of a systemic allergic reaction, such as difficulty breathing or swelling of the face or throat — seek emergency medical help immediately.

If you suspect a serious allergic reaction, stop using the drops immediately and seek urgent medical attention.

What Should You Do If You Experience Side Effects?

For mild, transient side effects such as brief stinging or temporary blurring, no action is usually needed — simply wait a few minutes for them to pass. If side effects are persistent, worsening, or causing you concern, stop using the drops and consult your pharmacist or GP. You should also report any suspected side effects through the MHRA Yellow Card scheme at yellowcard.mhra.gov.uk, which helps monitor the safety of medicines in the UK.

Never ignore a sudden change in your vision or significant eye pain. These symptoms always warrant prompt professional assessment, regardless of whether you are using eye drops.

Can Optrex Hayfever Relief Eye Drops Interact With Other Medicines?

No clinically significant drug interactions have been reported with topical sodium cromoglicate at the 2% concentration used in these drops. However, if you are using other eye drops or eye ointments at the same time, allow at least 5 minutes between applications to prevent one preparation washing out the other. Always inform your pharmacist of all medicines you are currently using, including other eye preparations, to ensure there are no compatibility concerns.

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

We’re a safe and
regulated UK service

Registered Pharmacy Badge

Lowest Price Guarantee

We're convinced you won't find your treatment cheaper, but if you do we'll refund the difference.

Find out more

100% discreet packaging

We're convinced you won't find your treatment cheaper, but if you do we'll refund the difference.

Find out more

Agent

Need help?
Talk to our friendly experts now

How our service works

Service Setup

Service setup

Discreet Packaging

Discreet packaging

Express Delivery

Express delivery