Patient info

Opticrom Allergy single dose 2% w/v eye drops solution – patient leaflet, side effects, dosage

Updated:
Key facts
Status:
Pharmacy medicine (P)
Medicine strength:
2% w/v (20 mg/ml)
Contains active substance:

Patient leaflet - Opticrom Allergy single dose 2% w/v eye drops solution

1. What Opticrom Allergy Single Dose is and what it is used for

Opticrom Allergy Single Dose 2% w/v Eye Drops, solution (called Opticrom Allergy Single Dose in this leaflet) contains a medicine called sodium cromoglicate. This belongs to a group of medicines called anti allergics.

What Opticrom Allergy Single Dose is used for

Opticrom Allergy Single Dose is used to relieve and treat eye allergies in adults and children. There are two types of eye allergy:

  • ‘perennial allergic conjunctivitis’ – this can happen at any time of the year
  • ‘hay fever’ or ‘seasonal allergic conjunctivitis’ – this happens in different seasons and is caused by different pollens. Signs of allergies include itchy, watery, red or inflamed eyes and puffy eyelids

How Opticrom Allergy Single Dose works

Opticrom Allergy Single Dose works by stopping the release of the natural substances in your eyes – these are the cause of the allergic reaction

2. What you need to know before you use Opticrom Allergy Single Dose

Do not use Opticrom Allergy Single Dose:

  • If you are allergic to sodium cromoglicate or any of the other ingredients of this medicine

    (listed in section 6). Signs include: a rash, swallowing or breathing problems, swelling of your lips, face, throat or tongue. Also, the redness, itching or swelling of the eyes or eyelids may get worse.

    Do not use Opticrom Allergy Single Dose if the above applies to you. If you are not sure, talk to your doctor or pharmacist before using this medicine.

    Warnings and precautions

    Once opened, use the single-dose container immediately. After use, throw away the container and any medicine left in it – do not use again. This is because the Opticrom Allergy Single Dose container is sterile and preservative-free.

    If you wear contact lenses, follow the instruction for contact lens wearers in section 3.

    Talk to your doctor or pharmacist if you are not sure whether the child has allergic eyes. Also do this, if you have any other questions about using these eye drops in a child.

    Pregnancy and breast-feeding

    If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before using this medicine.

    Driving and using machines

    You may have blurred eye-sight just after using this medicine. If this happens, do not drive or use any tools or machines until you can see clearly

3. How to use Opticrom Allergy Single Dose

Always use this medicine exactly as described in this leaflet or as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

How much to use

The recommended dose is:

  • 1 or 2 drops in each eye
  • 4 times a day.

You must contact your doctor if your symptoms worsen or do not improve.

Using this medicine

  • This medicine is for use in the eyes only (ocular use). Do not swallow it. • First wash your hands.
  • Break off one single-dose container from the strip.
  • Open the container by bending or twisting the tab – use it as soon as you have opened it. • Tilt your head back.
  • Pull down your lower eye lid.
  • Squeeze 1 or 2 drops inside the eye lid – without touching your eye with the container. • Close your eye.
  • Wipe away any liquid from around the eye with a clean tissue.

Then do the same to put the drops in the other eye. After use, throw away the container and any medicine left in it – do not use again

Contact lens wearers

As with most topical eye medications, if you wear contact lenses, you should remove them before using Opticrom Allergy Single Dose. After using this medicine, you should wait 15 minutes before putting your contact lenses back in.

If you use more Opticrom Allergy Single Dose than you should

If you use the eye drops more often than you should, talk to your doctor or pharmacist.

If you forget to use Opticrom Allergy Single Dose

  • If you forget a dose, use your drops as soon as you remember. However, if it is nearly time for your next dose, skip the missed dose.
  • Do not use a double dose to make up for a forgotten dose.

If you stop using Opticrom Allergy Single Dose

  • If you stop using this medicine, your signs of allergies may come back. Opticrom Allergy

    Single Dose keeps your eye allergies from returning.

  • Keep using the drops if you are still around the things that you are allergic to, even if your eye allergy has got better.

If you have any further questions on the use of this medicine, ask your doctor or pharmacist.

4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Stop using Opticrom Allergy Single Dose and talk to a doctor straight away if:

It is not known how often these happen.

  • the itching, redness or swelling of your eyes gets worse – you may be allergic to these drops.

Other side effects can include:

It is not known how often these happen

  • mild eye irritation
  • stinging or burning in your eyes or blurring of eye-sight – this should only last for a short time and happens immediately after using the eye drops.

Reporting of side effects

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine

5. How to store Opticrom Allergy Single Dose

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the label and carton after EXP. The expiry date refers to the last day of that month.

Store below 25°C.

Keep the single-dose containers in the aluminium sachet in order to protect from light.

After opening the aluminium sachet, throw away any remaining contents after 28 days. Once opened, use the single-dose container immediately. After use, throw away the container and any medicine left in it – do not use again. This is because the Opticrom Allergy Single Dose container is sterile and preservative-free.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other information

What Opticrom Allergy Single Dose contains

  • The active substance is sodium cromoglicate. Each single-dose container contains 2% w/v of sodium cromoglicate.
  • The other ingredients are sodium chloride and purified water.

What Opticrom Allergy Single Dose looks like and contents of the pack

Opticrom Allergy Single Dose is a clear colourless to pale yellow solution supplied in single-dose container of 0.3 ml packaged in an aluminium sachet.

Pack sizes: 10 and 20 single-dose containers.

Not all pack sizes may be marketed.

Marketing Authorisation Holder and Manufacturer

Marketing Authorisation Holder

Thornton & Ross Ltd., Linthwaite, Huddersfield, HD7 5QH, UK

Manufacturer

Laboratoire Unither

Espace Industriel Nord 151, rue André Durouchez CS 28028

80084 AMIENS

France

This leaflet does not contain all the information about your medicine. If you have any questions or are not sure about anything, ask your doctor or pharmacist.

This leaflet was last revised in 10/2023

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 00240/0499

Last revision stated in the text: October 2023 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Opticrom Allergy single dose 2% w/v eye drops solution

Prescription needed? No, but it is sold only in pharmacies (P)
Active substance Sodium cromoglicate
Strength 2% w/v (20 mg/ml)
Pharmaceutical form Eye drops
A clear colourless or pale yellow liquid.
pH: 5.0 to 7.0
Osmolality: 280 to 340 mOsmol/kg
How is it taken Ocular
Excipients Sodium chloride, Purified water
Pack sizes 10 ml
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life Unopened: 3 years
After opening the sachet: 28 days After opening the single-dose container: the medicinal product must be used immediately.
Storage Before opening single-dose container:
Store below 25 °C. Keep the single dose containers in the aluminium sachet in order to protect from light.
After opening single-dose container:
Discard any remaining contents after use.
Drug group (ATC) Ophthalmologicals; other antiallergics
  1. S Sensory organ drugs
    1. S01 Ophthalmologicals
      1. S01G Decongestants and antiallergics
        1. S01GX Other antiallergics
          1. S01GX01 cromoglicic acid
Marketing authorisation PL 00240/0499 (first authorised 22 December 2014)
Marketing authorisation holder Thornton & Ross Limited, Linthwaite, Huddersfield, HD7 5QH, UK
Codes GTIN 5011309115512 · BNF 11040200

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.2.0 of 19 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.