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Cromolyn sodium eye drops

Dr Karen Martin
Reviewed by Dr Karen MartinReviewed on 19.10.2023 | 2 minutes read

Cromolyn sodium eye drops are used for the relief of eye irritation caused by hay fever and other allergy-related eye symptoms. It works by locally inhibiting the release of histamine from the eyes, which causes irritation and discomfort. It is not technically classed as an antihistamine medication, as it does not directly work against histamine, however, it does prevent your cells from producing it.

Who is it for, and how to use it?

This medication is only available with a doctor’s prescription. It can be used by children and adults over the age of 4 years for treating eye irritation and discomfort associated with hay fever and other allergies such as animal/pet. You can use 1 to 2 drops up to 4 times a day. Contact lenses should be removed prior to using the drops, and not reinserted for at least 15 minutes.

You should speak to your pharmacist or doctor if you need to use these eye drops for more than 14 days. If you have pain, red eyes, or bothersome symptoms and wear contact lenses, you should see or speak to your doctor urgently, as serious infections are more common.

How does it work?

When you come into contact with something you are allergic to, such as pollen, your body reacts and triggers cells to release histamine in response. Histamine causes the typical symptoms of an allergy, such as eye-watering, itching, swelling, irritation, and discomfort. Cromolyn sodium works by reducing the sensitivity of the histamine-producing cells, causing them to produce less, and thus relieving discomfort caused by the allergy.

Should anyone avoid taking it?

Although this medication is very safe for use by adults and children, you should discuss with a pharmacist or doctor before using these eye drops if you are pregnant, breastfeeding, or if this medication is for a child below 4 years of age.

Are there any side effects?

As with any medication, some people are bound to get some unwanted side effects. Some of the common ones include short-term eye-stinging and blurred vision.

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Dr Karen Martin
Reviewed by Dr Karen Martin
Reviewed on 19.10.2023
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