• Works quickly to relieve red, itchy, and watery eyes
  • Provides targeted relief directly where it’s needed
  • Suitable for regular use throughout allergy season

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Overview

Red, itchy, and watery eyes can make hayfever or allergies feel unbearable. Olopatadine eye drops provide fast, targeted relief straight to the source of irritation — helping to calm itching, soothe redness, and restore comfort. As a trusted prescription-strength antihistamine eye drop, Olopatadine is designed to bring clarity back to your day when allergies affect your eyes the most.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.


What is Olopatadine 


Olopatadine eye drops are an antihistamine treatment that work by blocking histamine — the chemical responsible for allergy symptoms — while also reducing inflammation in the eyes. This dual action helps calm irritation and restore comfort during allergy flare-ups.

They are most commonly used for seasonal allergic conjunctivitis (hay fever-related eye allergies) and for relieving red, itchy, and watery eyes triggered by pollen, dust, or pet dander.

By delivering relief directly to the eyes, olopatadine eye drops act quickly — often within minutes — to reduce itching, redness, and watering. They are suitable for regular use throughout allergy season, providing ongoing protection against uncomfortable eye symptoms.

Directions

  • Adults and children aged 12 and over: One drop in each affected eye twice daily (every 8–12 hours)
  • Do not exceed two doses per day
  • Wash hands before use and avoid touching the dropper tip to the eye or any surface
  • Remove contact lenses before using, and wait at least 15 minutes before reinserting them


Always follow prescriber or pharmacist instructions carefully.

Side Effects

Like all medicines, olopatadine eye drops can cause side effects, although not everyone will experience them. Most are mild, temporary, and improve as your eyes adjust to treatment.

Common (may affect up to 1 in 10 people):

  • Mild eye irritation (burning or stinging after application) – this usually settles within a few minutes of using the drops.
  • Dry eyes – a temporary feeling of dryness or grittiness may occur.
  • Headache – typically mild and short-lived.


Less common (may affect up to 1 in 100 people):

  • Blurred vision – temporary blurring may occur just after using the drops; avoid driving or operating machinery until your vision clears.
  • Unusual taste in the mouth after application – this may happen if some of the solution drains into the throat, but it usually passes quickly.
  • Tiredness – a small number of people may feel slightly fatigued after use.


Rare but serious (seek urgent medical advice):

  • Severe allergic reaction (anaphylaxis) – symptoms include swelling of the face, lips, tongue, or throat, difficulty breathing, or a sudden rash. This is extremely rare but requires immediate medical help.


Most people tolerate olopatadine eye drops well, and side effects (if they do occur) are generally mild. If you are concerned about any symptoms, or they do not improve, speak to your doctor, pharmacist, or prescriber.

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet that comes with your medicine for full details. If you experience severe or worrying symptoms, seek medical advice straight away. In an emergency, call 999 or go to A&E.

Warnings

Olopatadine may not be suitable if you:

  • Are allergic to Olopatadine or any of the ingredients
  • Wear contact lenses constantly (you must remove them before use)
  • Are pregnant or breastfeeding (seek advice first)
Frequently asked questions

  • What are Olopatadine eye drops used for?

    Olopatadine eye drops are used to treat allergic conjunctivitis, which causes itchy, watery, or red eyes. They work by blocking histamine release in the eye, helping calm irritation and reduce allergy symptoms during flare-ups or exposure to triggers like pollen or pet dander.

  • How do Olopatadine eye drops work?

    Olopatadine is an antihistamine and mast cell stabiliser that reduces inflammation inside the eye. It helps stop the release of chemicals responsible for itching, redness, and watering, giving targeted relief directly at the source of symptoms. This makes it very effective for seasonal allergies and year-round triggers.

  • How quickly do Olopatadine eye drops start working?

    Most people feel relief from itching and irritation within minutes of applying Olopatadine eye drops. The full effect continues to build over several hours, especially if used regularly during allergy season. 

  • How do I use Olopatadine eye drops correctly?

    Tilt your head back, gently pull down the lower eyelid, and apply one drop into the pocket. Avoid touching the bottle tip to your eye. Blink slowly and wait a few minutes before using other eye drops.

  • Are Olopatadine eye drops safe for long-term use?

    Yes. Olopatadine eye drops are considered safe for longer-term use during allergy seasons or when symptoms persist. They have a good safety profile and do not thin the eye tissues. If you need them daily for many months, speak to a clinician for review. Other long term options include oral antihistamines such as fexofenadine or cetirizine. 

  • Can I use Olopatadine eye drops with contact lenses?

    You should remove contact lenses before applying Olopatadine eye drops. Wait at least 10–15 minutes before putting them back in. The drops can temporarily interact with some lens materials or preservatives, so giving your eyes time helps prevent irritation.

  • What are the common side effects of Olopatadine eye drops?

    The most common side effects include mild stinging, dryness, temporary blurred vision, or a slight bitter taste. These usually settle within a few minutes. Serious reactions are very rare but seek help if symptoms worsen or you develop swelling around the eyes. If side effects are troublesome, other eye drop options include sodium cromoglicate.

  • Can I use Olopatadine eye drops alongside oral antihistamines?

    Yes. Many people use Olopatadine eye drops with oral antihistamines such as fexofenadine or cetirizine for stronger allergy control. Combining both can help manage full-body symptoms while targeting eye irritation directly. A clinician can advise on the best combination.

  • Are Olopatadine eye drops safe during pregnancy or breastfeeding?

    Olopatadine should only be used during pregnancy or breastfeeding if a clinician agrees it is necessary. Although very little medicine is absorbed into the body, safety data is limited. Always check with a pharmacist or prescriber before use.

  • Can I use Olopatadine eye drops every day?

    Yes, you can use Olopatadine daily during allergy season or whenever symptoms are active. Many people benefit from consistent use to prevent flare-ups rather than waiting for symptoms to worsen. Follow the frequency recommended on your product.

  • Can I drive after using Olopatadine eye drops?

    Some people may temporarily experience blurred vision right after applying Olopatadine. It usually clears within minutes. Wait until your vision feels fully normal before driving or operating machinery to ensure safety. If issues with your vision persist, other eye drop options include sodium cromoglicate.

  • How long can I use a bottle of Olopatadine eye drops after opening it?

    Most Olopatadine eye drops should be discarded 4 weeks after opening to reduce the risk of contamination. Check your specific product label as some variants have slightly longer or shorter expiry guidance.

  • Can children use Olopatadine eye drops?

    Some Olopatadine products are licensed for children aged 3 and over, but doses may differ. Always check the product leaflet and confirm with a pharmacist to ensure safe and age-appropriate use.

  • What should I avoid while using Olopatadine eye drops?

    Try to avoid rubbing your eyes, as this worsens irritation. Also avoid wearing contact lenses too soon after application and do not use other medicated eye drops without medical advice, as interactions may occur. If you find that eye drops are unsuitable, other options include antihistamine tablets and nasal sprays.

  • Can I buy Olopatadine eye drops online in the UK?

    Yes. Olopatadine eye drops are available online from UK-registered pharmacies after a short clinical assessment. This ensures the drops are suitable and safe based on your symptoms and medical history. Always avoid unregulated sellers.