Eye
Medicines for Allergic conjunctivitis
Itchy, red, watery eyes caused by an allergic reaction — commonly to pollen, dust mites or pets — which is harmless and manageable with drops and avoiding triggers.
Education and reference only. This explains which medicines are used and why, in plain language — it deliberately contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician, and check the BNF and the product labelling for prescribing detail.
Quick answer
What is Allergic conjunctivitis?
Allergic conjunctivitis is inflammation of the surface of the eyes caused by an allergic reaction, when the eyes come into contact with something the person is allergic to. It causes itchy eyes (itching is the key symptom), redness, watering, a gritty or burning feeling, and puffy or swollen eyelids, usually affecting both eyes.
- How it is treated: Management combines avoiding triggers where possible with treatments to relieve symptoms.
- Self-care: Avoiding or reducing allergen exposure (pollen, dust mites, pets), not rubbing the eyes, using cool compresses and lubricating drops to soothe and wash out allergen, and using anti-allergy eye drops and antihistamines all help.
- When to seek help: A pharmacist can advise on treatment.
What it is
Allergic conjunctivitis is inflammation of the surface of the eyes caused by an allergic reaction, when the eyes come into contact with something the person is allergic to. It causes itchy eyes (itching is the key symptom), redness, watering, a gritty or burning feeling, and puffy or swollen eyelids, usually affecting both eyes. It often occurs alongside allergic rhinitis (hay fever or allergies causing a runny, itchy nose and sneezing). Common triggers include pollen (causing seasonal symptoms, as in hay fever), house dust mites, animal dander (from pets), and mould; contact with certain substances (such as eye make-up or eye drops) can also cause it. It is very common, uncomfortable, and can affect quality of life and concentration, but it is harmless to the eyes and does not damage vision. It is different from infective conjunctivitis (caused by bacteria or viruses), and the itching and the link with other allergies help distinguish it.
How it is treated
Management combines avoiding triggers where possible with treatments to relieve symptoms. Avoiding or reducing exposure to the allergen helps — for example measures to reduce pollen exposure in the season (such as staying indoors when the pollen count is high, wearing wraparound sunglasses, and not rubbing the eyes), reducing house dust mites, or managing pet exposure. For symptoms, cool compresses and lubricating (artificial tear) drops soothe the eyes and wash out allergen, and specific anti-allergy eye drops (such as antihistamine or mast-cell-stabiliser drops) are effective; antihistamines taken by mouth help, especially where there are also nasal allergy symptoms. Not rubbing the eyes is important, as it worsens the irritation. Where allergic conjunctivitis is part of wider allergies, managing those (for example hay fever) helps. For persistent or severe cases, a doctor or optician can advise, and rarely more significant allergic eye conditions need specialist care. The reassuring message is that allergic conjunctivitis is harmless to the eyes and usually well controlled with avoiding triggers and anti-allergy drops.
For this condition, these medicines
Medicine classes used for Allergic conjunctivitis
Each links to a full, dose-free guide — what it is, how it works, who can and cannot use it, side effects, interactions and FAQs.
Beyond medication
Lifestyle and self-care
Avoiding or reducing allergen exposure (pollen, dust mites, pets), not rubbing the eyes, using cool compresses and lubricating drops to soothe and wash out allergen, and using anti-allergy eye drops and antihistamines all help. Wraparound sunglasses reduce pollen contact.
When to get help
When to see a doctor
A pharmacist can advise on treatment. See a GP or optician if symptoms are persistent, severe, or not controlled with over-the-counter treatments. Seek prompt eye care for eye pain, marked light sensitivity, or reduced vision, which suggest a different problem.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
Answers
Allergic conjunctivitis: frequently asked questions
What causes itchy, allergic eyes?
Allergic conjunctivitis — an allergic reaction of the eye surface, commonly to pollen (as in hay fever), house dust mites, pet dander or mould. Itching is the key symptom, often with redness, watering and puffy lids, usually in both eyes.
How do you treat allergic conjunctivitis?
By avoiding triggers where possible, cool compresses and lubricating drops, anti-allergy eye drops, and antihistamines (especially with nasal symptoms). Not rubbing the eyes is important. It is harmless to the eyes and usually well controlled.
Sources
Where this is drawn from
- NHS — Allergic conjunctivitis
- College of Optometrists guidance
Related conditions
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