Sodium Cromoglicate Eye Drops

What are sodium cromoglicate eye drops?

Sodium cromoglicate eye drops belong to a group of medicines called anti-allergics. They are used to relieve symptoms caused by eye allergies, such as itching, redness, and watering. These symptoms are often triggered by things like pollen (hay fever), pet dander, or dust mites. The drops are available over the counter in shops or pharmacies and are safe for use in adults and children[1]. 

You can find advice here on sodium cromoglicate capsules. 

What are sodium cromoglicate eye drops used to treat?

These eye drops are used to treat[1]: 

• Seasonal allergic conjunctivitis, often caused by pollen during hay fever season 

• Perennial allergic conjunctivitis, linked to year-round allergens like house dust mites or animal dander 

• Other allergic eye reactions that cause discomfort and inflammation 

How do sodium cromoglicate eye drops work?

Sodium cromoglicate works by stabilising special cells in the eye called mast cells. During an allergic reaction, these cells release histamine and other chemicals that cause inflammation and symptoms like itching or redness. The drops prevent this release, helping to reduce swelling, irritation, and allergic responses over time. 

Who can take sodium cromoglicate eye drops?

These drops are generally suitable for[1]: 

• Adults and children (usually from any age unless otherwise stated on the packaging, but not for children younger than 6 months if bought in a shop rather than a pharmacy) 

You should speak to a doctor if you[1]: 

• Wear soft contact lenses 

• Have dry eye syndrome 

• Have previously had allergic reactions to eye drops or preservatives in the formulation 

• Are pregnant or breastfeeding 

Please tell your doctor or pharmacist about any conditions you may have or medication you take before you start treatment, and always follow the instructions in the Patient Information Leaflet[2].  

What is the typical dosage of sodium cromoglicate eye drops?

The standard dose is[1]: 

• 1 or 2 drops in each affected eye, up to four times a day 

• You should try to use them regularly to get the full benefit 

• Relief may begin within a few days, but full effects can take up to 2 weeks 

How do you take sodium cromoglicate eye drops?

To apply the drops properly: 

• Wash your hands 

• Tilt your head back and gently pull down the lower eyelid 

• Hold the bottle just above the eye and squeeze out one drop 

• Close your eye and press gently on the inner corner for about one minute 

• Repeat in the other eye if needed 

Try not to touch your eye or any other surface with the dropper tip to avoid contamination. 

Can you stop taking sodium cromoglicate eye drops?

Yes, you can stop using them once your allergy symptoms improve or allergy season ends. If symptoms return, you can restart use. If a doctor prescribed them, always follow their advice on when to stop[1]. 

What do you do if you take too much sodium cromoglicate eye drops?

Using more than the recommended dose is unlikely to cause serious harm. However, it may cause temporary side effects like irritation or watery eyes. If you're concerned or symptoms persist, rinse your eyes with clean water and contact a healthcare professiona[1]l. 

What do you do if you forget to take sodium cromoglicate eye drops?

If you miss a dose[1]: 

• Use it as soon as you remember 

• If it’s almost time for your next dose, skip the missed one 

• Do not use double the amount to make up for a missed dose 

How do you store sodium cromoglicate eye drops?

To keep your drops safe and effective[1]: 

• Store at room temperature, away from direct sunlight and heat 

• Keep the bottle tightly closed when not in use 

• Do not use more than 4 weeks after opening, as it may become contaminated 

• Keep out of reach of children 

What medicines can’t you take with sodium cromoglicate eye drops?

These eye drops are generally safe to use alongside most other medicines. However[1]: 

• Do not use them at the same time as other eye drops unless a doctor or pharmacist has advised you to 

• Wait at least 5 to 10 minutes between applying different eye medications 

Always inform your doctor or pharmacist about all medications and supplements you take before you start a new medicine, and follow the instructions in the Patient Information Leaflet[2]. 

What are the side effects of sodium cromoglicate eye drops?

Most people do not experience side effects, but possible reactions include[1]: 

• A mild stinging or burning sensation when the drops are applied 

• Temporary blurred vision 

• Minor eye redness or irritation 

You should contact your GP if you experience any of these symptoms. In rare cases, the medicine may cause a serious allergic reaction (anaphylaxis). You should call 999 or visit A&E immediately if you believe this is happening[1]. 

Symptoms of anaphylaxis include[1]:  

• Difficulty breathing  

• Tightness in throat and chest  

• Swelling of the tongue or throat  

• Feeling faint or dizzy  

• Blue/grey skin or lips  

• Loss of consciousness 

If you experience any side effects, including those not listed, you are encouraged to report them via the Yellow Card Scheme or contact your doctor, pharmacist, or nurse. This information is intended as a summary for general awareness and does not replace professional medical advice. 

The information provided in the side effects section is not a comprehensive list of all possible side effects associated with this medication. For a complete list of side effects, please refer to the Patient Information Leaflet (PIL) provided with your medication or consult your healthcare professional[2]. 

Frequently asked questions about sodium cromoglicate eye drops

How long can I use sodium cromoglicate eye drops? 
You can use them throughout allergy season, but do not use the same bottle for more than four weeks after opening[1]. 

Can I use these drops with contact lenses? 
Not with soft lenses. Remove your lenses before using the drops and wait at least 15 minutes before putting them back in. If an option, switch to using glasses whilst the drops are required[1]. 

Can children use these drops? 
Yes, they are suitable for children but check the product packaging or ask a pharmacist for age-specific guidance[1]. 

How quickly do the drops work? 
You may notice relief in a few days, but full benefit may take up to two weeks[1]. 

Can I use other eye drops at the same time? 
Yes, but you should space them out by at least 5-10 minutes[1]. 

What if the drops sting? 
A mild sting is common and should pass quickly. If irritation continues, speak to your pharmacist[1]. 

Can I drive after using them? 
Wait until any blurred vision clears before driving or operating machinery[1]. 

What if my symptoms don’t improve? 
If your symptoms haven't improved after two weeks, see your doctor or pharmacist for advice[1]. 

For the official NHS guide to sodium cromoglicate eye drops, visit their website.