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Antihistamines / Allergy

Our antihistamines/allergy class of eye medications are used to treat allergic eye condition like conjunctivitis caused by seasonal allergies like hay fever or perennial allergies like allergy to animal dander, to relieve symptoms.

Use the search feature to quickly find the product you are looking for, by entering either the active ingredient, e.g. olopatadine or the product name, e.g. Patanol

Allergic conjunctivitis

Allergic conjunctivitis is inflammation of the conjunctiva, which is the inner lining of the eyelids and sclera of the eye (white part of the eye). It is caused by an allergic reaction to allergens such as pollen, animal dander or house dust mites with symptoms including swollen red eyes, itching and eye watering.

Antihistamine eye drops

Eye drops containing the antihistamine olopatadine, can be used to relieve symptoms of allergic conjunctivitis. Olopatadine works by binding to the H1 receptor on the conjunctival cells in the eye and this blocks the action of histamine, which is released by mast cells during an allergic reaction and is responsible for most of the symptoms of allergic conjunctivitis.
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Customer Review

Hear from more than 1000 happy customers!
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"Great service, never had a problem"
Kimberly NM, USA • August 2025
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"Thank you for being a terrific online pharmacy!"
Ellen TX, USA • January 2024
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"Hi, I just must stop and say thank you for all you girls have done over, the years. Your service is excellent! Always courteous and professional!"
David Koss PA, USA • July 2025
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"Thank you. I received my first shipment last week and I am very happy with the whole ordering experience and results."
Katherine FL, USA • November 2024
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"Thank you so much, your customer service and loyalty is the best!"
Margaret OH, USA • January 2024
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"Hello, I have excellent news to report. My replacement order arrived today, thank you so much for sending it out to me. Everything came perfectly intact and I have already began to take the meds. Thank you so much for everything, you are a great company. Take care and be blessed."
Mira DE, USA • February 2024
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"Thank You for the Professional and Prompt way you have handled my missing shipment.  I have been doing business with you for a long time and I so much appreciate when a company values their customers and addresses issues in such a caring way and with such integrity.  I will be doing business with you for a very long time to come.  Thank You again."
Sheila OH, USA • January 2024
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"Staff is very responsive and I do not mind the shipping times! Very affordable and has helped my quality of life a lot. Had one hiccup and staff were QUICK with assisting me to ensure I get what I paid for! Have been a customer since 2022."
Emily OH, USA • January 2024
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Stevie Rhodes UK • May 2025
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"Just love this place. Great customer service and always delivery as requested. Been doing business with them for years. Thank you so much Inhouse"
Cheryl Owens TX,USA • August 2025
 

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