Home » What Is Sodium Cromoglicate Eye Drops?

What Is Sodium Cromoglicate Eye Drops?

Sodium Cromoglicate Eye Drops for for management of hayfever symptoms

Symptomatic management of hayfever involves the use of antihistamine drugs alone or in combination with steroid nasal sprays and eye drops such as sodium cromoglicate eye drops. In this post, I will describe the use of Sodium Cromoglicate for the management of hayfever symptoms such as itchy and watery eyes. I will discuss:

  • How sodium cromoglicate works
  • Licensing restrictions (age restrictions)
  • Use of sodium cromoglicate eye drops in pregnancy and when breastfeeding
  • Recommended use
  • Possible side effects associated with the use of drops
  • Availability of different brands of Sodium Cromoglicate eye drops
  • Examples of sodium cromoglicate drops available to buy online

How Does Sodium Cromoglicate Eye Drops Work?

Sodium Cromoglicate reduces the release of histamine from the mast cell to stop allergic reactions due to allergens such as pollen, giving it a descriptive name of mast cell stabilizer.
Histamine is mainly stored in mast cells. During allergic reactions, histamine levels increase, causing the main symptoms of hayfever, such as itchiness (pruritus), sneezing (White, 1990). It is the histamine that contributes to symptoms of ocular (eye) allergic symptoms like redness and watering of the eyes.
The main indications for the use of eye drops containing Sodium Cromoglicate are the relief and treatment of seasonal and perennial (chronic) allergic conjunctivitis. Sodium cromoglicate help with:

  • Soothing of the itchy eyes
  • Prevention of symptoms associated with common allergens such as pollen or dust mites
  • Relieving of itching, redness, and watering of eyes due to hayfever

Existing evidence from different clinical trials confirms that Sodium Cromoglicate is effective in the management of allergic conjunctivitis (Juniper, et al. 1994).

Sodium Cromoglicate Eye Drops: Where To Buy?



Sodium Cromoglicate eye drops are available as the general sale list item (GSL), meaning they can be purchased from any retail outlet or as pharmacy only medication (P), available only from pharmacies including online chemists.

There is no difference between Sodium Cromoglicate eye drops purchased from a supermarket and pharmacy. Both products contain the same active ingredient: Sodium Cromoglicate 2%.

Age Restrictions

Over the counter, Sodium Cromoglicate drops are licensed for adults and children from 6 years of age. For children under 6 years of age, product information states that ‘there is no relevant indication’ to use Sodium Cromoglicate.
Drops containing Sodium Cromoglicate should not be used in children under two years of age.

Sodium Cromoglicate Drops: Use In The Pregnancy And Lactation

The product information states that caution should be taken (especially) during the first trimester of the pregnancy. Existing evidence with Sodium Cromoglicate indicates that there are no adverse effects on baby development in the pregnancy. Sodium cromoglicate should only be used in pregnancy when there is a definite need.

It is considered unlikely for Sodium Cromoglicate to be excreted in the breastmilk. No information exists, which suggests that Sodium Cromoglicate has adverse effects on the baby when breastfeeding.

How Often Should Sodium Cromoglicate Be Used?

For adults and children over six years of age, one or two drops should be instilled into each eye four times a day.

What Sodium Cromoglicate Drops Can You Buy?

There are several eye drop brands containing Sodium Cromoglicate. Common brands include:

  • Opticrom Hayfever 2% (available in supermarkets and other retail outlets)
  • Opticrom Allergy 2% (available as a pharmacy-only product, with no difference to the above drops)
  • Opticrom Allergy single-dose eye drops. Sodium cromoglicate is supplied in single-dose containers. Opticrom Allergy single-dose eye drops are sterile and preservative-free
  • Optrex Hayfever Relief 2% Eye Drops (available in supermarkets and other retail outlets)
  • Optrex Allergy 2% Eye Drops (pharmacy only product)

Additionally, larger pharmacies such as Boots and Lloyd Pharmacy sell their brands of Sodium Cromoglicate 2% eye drops.

Use Of Sodium Cromoglicate By Contact Lens Users

A patient who uses soft contact lenses should avoid contact with eye drops. Contact lenses should be removed before application and put back at least 15 minutes after the application. The same advice applies to preservative-free, single-use eye drops.

Sodium Cromoglicate Eye Drops: Possible Side Effects

Some possible side effects associated with the use of Sodium Cromoglicate containing eye drops may include (frequency not known):

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  • Mild eye irritation
  • Stinging or burning, which may happen straight after the application of the eye drops

Other Options In The Management Of  Seasonal Hayfever

Seasonal hayfever can be managed with different drugs available in supermarkets and pharmacies. Antihistamine tablets and steroid nasal sprays reduce different symptoms associated with hayfever, including itchy and burning eyes. Some popular products used in the management of hayfever include:


What is sodium Cromoglicate eye drops used for?

Sodium cromoglicate eye drops are used in the management of hayfever symptoms of eyes such as itchiness, redness and water eyes.

Is sodium cromoglycate an antihistamine?

Sodium cromoglycate is not an antihistamine, although it prevents the release of histamine (which causes symptoms of hayfever) trough a different mechanism to commonly available antihistamines.

Can you use antihistamine eye drops with oral antihistamine?

An oral antihistamine can be used together with antihistamine eye drops such as sodium cromoglicate eye drops as both stop the release of histamine via different mechanisms of action.

Is sodium cromoglycate a steroid?

Sodium cromoglycate is not a steroid. Sodium cromoglycate belongs to a group of drugs called mast cell stabilisers.


  • Elizabeth F. Juniper, Gordon H. Guyatt, Penelope J. Ferrie, Derek R. King. Sodium cromoglycate eye drops: Regular versus “as needed” use in the treatment of seasonal allergic conjunctivitis. Available at: https://doi.org/10.1016/0091-6749(94)90069-8 Accessed on 13/04/20 20
  • White MV. The role of histamine in allergic diseases. J Allergy Clin Immunol. 1990;86(4 Pt 2):599–605. doi:10.1016/s0091-6749(05)80223-4 Available at: https://doi.org/10.1016/s0091-6749(05)80223-4 Accessed on 11/04/2020