• Helps prevent and control itching, redness, and watering of the eyes
  • Works best with regular use during allergy season
  • Non-drowsy and suitable for daily, long-term use

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Overview

Sore, red, and itchy eyes from hayfever or allergies can make everyday life uncomfortable and distracting. Opticrom eye drops provide targeted relief straight to your eyes, helping calm irritation, reduce redness, and ease watering. Trusted by allergy sufferers for decades, Opticrom is a well-established treatment that helps you regain clear, comfortable vision when allergies strike.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.


What is Opticrom


Opticrom contains sodium cromoglicate, a type of medicine called a mast cell stabiliser. Unlike antihistamines, which treat allergy symptoms after they appear, mast cell stabilisers work by preventing the release of histamine in the first place. This makes Opticrom especially useful for the long-term control of allergic eye symptoms.

It is commonly used to treat seasonal allergic conjunctivitis (hay fever-related eye allergies) as well as year-round allergic conjunctivitis caused by triggers such as dust or pets.

Opticrom works best when used regularly during allergy season, helping to reduce itching, redness, and watering in the eyes. Because it is non-drowsy and safe for daily use, it’s suitable for both short-term seasonal flare-ups and longer-term allergy management.

Directions

  • Adults and children aged 6+: One or two drops into each eye, four times daily
  • Continue regular use throughout allergy season for best results
  • Wash hands before applying
  • Do not touch the dropper tip to the eye or any surface
  • Remove contact lenses before use; wait at least 15 minutes before reinserting


Always follow the guidance of your prescriber or pharmacist.

Side Effects

Like all medicines, Opticrom eye drops can cause side effects, although not everyone will experience them. Most are mild, temporary, and improve as your eyes adjust to treatment.

Common (may affect up to 1 in 10 people):

  • Mild burning or stinging after application – this usually settles within a few minutes of using the drops.
  • Temporary blurred vision – vision may be affected briefly after applying the drops; avoid driving or operating machinery until your sight clears.


Less common (may affect up to 1 in 100 people):

  • Eye dryness or irritation – some people may notice discomfort or a gritty sensation in the eyes.
  • Watery eyes – occasionally, the drops may make the eyes feel more watery before symptoms improve.


Rare but serious (stop use and seek urgent medical advice):

  • Severe allergic reaction (anaphylaxis) – symptoms include swelling of the face, lips, tongue, or throat, difficulty breathing, or a sudden rash. This is very rare but requires immediate medical help.


Most people tolerate Opticrom well, and side effects (if they do occur) are usually mild. If you are concerned about any symptoms, or they do not improve, speak to your doctor, pharmacist, or prescriber.

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet that comes with your medicine for full details. If you experience severe or worrying symptoms, seek medical advice straight away. In an emergency, call 999 or go to A&E.

Warnings

Opticrom may not be suitable if you:

  • Are allergic to sodium cromoglicate or any of the ingredients
  • Wear contact lenses constantly (always remove before applying)
  • Are pregnant or breastfeeding (seek advice before use)
Frequently asked questions

  • What are Opticrom eye drops used for?

    Opticrom (sodium cromoglicate) is used to treat allergic conjunctivitis, easing itchy, watery, red or irritated eyes caused by pollen, dust mites and pet allergens. It helps calm the allergic response on the eye’s surface and reduces inflammation during flare-ups.

  • How does Opticrom work?

    Opticrom (sodium cromoglicate) works by stabilising mast cells in the eye, preventing them from releasing histamine when allergens make contact. This helps reduce irritation, redness and watering, especially during pollen season or indoor allergen exposure.

  • How quickly does Opticrom start working?

    Opticrom (sodium cromoglicate) does not work instantly. It can take a few days for symptoms to improve, with full relief usually building over a week. Starting treatment early in allergy season gives the best overall control.

  • How do I use Opticrom eye drops correctly?

    Use Opticrom (sodium cromoglicate) by applying one or two drops to each affected eye up to four times daily. Pull down the lower eyelid, apply the drop into the small pocket and avoid touching your eye with the bottle tip to keep it clean.

  • Are Opticrom eye drops safe for long-term use?

    Yes. Opticrom (sodium cromoglicate) is considered very safe for long-term use, especially during allergy season. Many people use it daily to prevent flare-ups rather than just treating symptoms once they appear.

  • Can I use Opticrom if I wear contact lenses?

    Opticrom (sodium cromoglicate) should be used without contact lenses in place. Remove lenses before applying the drops and wait 10–15 minutes before reinserting them to avoid irritation or stinging.

  • What side effects can Opticrom cause?

    Opticrom (sodium cromoglicate) may cause brief stinging, mild irritation or temporary blurred vision after use. These effects settle quickly. Rarely, people experience swelling or worsening redness, which should be checked by a clinician.

  • Can I use Opticrom with oral antihistamines?

    Yes. Opticrom (sodium cromoglicate) can be combined with oral antihistamines such as fexofenadine or cetirizine for fuller allergy control. The eye drops treat local irritation, while tablets help with sneezing, itching and blocked nose symptoms.

  • Is Opticrom suitable for children?

    Opticrom (sodium cromoglicate) is suitable for many children aged 6 and above. It is gentle and commonly recommended during hay fever season. For younger children, always seek advice before starting regular use.

  • Can I drive after using Opticrom?

    Opticrom (sodium cromoglicate) may temporarily blur your vision immediately after applying the drops. Wait until your sight is completely clear before driving or operating machinery to ensure safety.

  • How long is Opticrom safe to use after opening?

    Opticrom (sodium cromoglicate) drops should be discarded 4 weeks after opening to prevent contamination, even if solution remains. Always check the leaflet for the exact expiry guidance for your specific bottle.

  • Does Opticrom work for pet or dust allergies?

    Yes. Opticrom (sodium cromoglicate) helps manage eye symptoms caused by indoor allergens such as pet dander, dust mites and mould. Using it consistently often provides the best relief for long-term or year-round allergies.

  • Can I use Opticrom alongside steroid nasal sprays?

    Opticrom (sodium cromoglicate) can be used safely with nasal sprays such as mometasone for broader allergy relief. This combination helps ease both nasal blockage and itchy, watery eyes during high pollen exposure.

  • What should I avoid while using Opticrom?

    Avoid rubbing your eyes, applying the drops over makeup or using old contact lenses, as these may worsen irritation. If symptoms continue after a week of regular use, seek advice for further assessment.

  • Can I buy Opticrom online safely?

    Yes. Opticrom (sodium cromoglicate) can be bought from UK-registered online pharmacies without a prescription. Always check the website is regulated and follow the dosing instructions for safe and effective use.