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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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"Always had excellent customer service and have been using this company for many years."
Carole UK • January 2025
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"I received your replacement shipment today. Thank you for your help and patience in this matter. I've ordered several other medications from you over the last 3 years, all of which arrived promptly. I have told a number of people about your outstanding service and reliable medications. Again, thank you so much."
Brian CA, USA • January 2024
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"Thank you so much for taking care of this for me! Going on over 20 years as a satisfied customer!"
Colee FL, USA • January 2024
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"Thank you as always for the great customer service and always responding quickly to any questions I have."
David MI, USA • January 2024
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"You guys are the best Bonnie, thank you."
Mike OK, USA • February 2024
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"I want to say a big thank you to everyone at Inhouse Pharmacy. Over the last 4 years, you have been such a valuable part of my life. You have listened to me, helped me and shown such kindness. It is not an exaggeration to say that without the supply of medication from yourselves, I would not be alive today. People like myself in the UK are literally left to our own devices as the medical industry denies us life critical care. Please keep up the good work, and help as many people as you can. Thank you for all your help. "
Alan UK • October 2024
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"I have been a customer for so long I can't remember when I signed up and it was over 10 years ago. I have been nothing but PLEASED with the service you provide. Here in the US people in my neighbourhood are crying for a decent pharmacy I've mentioned Inhousepharmacy.vu to these folks on a neighbourhood service."
Victor Riggan TX, USA • August 2025
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"Thank you for your timely assistance in sending the replacement. I greatly appreciate your customer service."
Lenore OR, USA • January 2024
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"Thank you again so very much! I couldn’t wish for a better company to do business with. Many thanks!"
Suze Moon WA, USA • April 2025
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"You guys are great keep doing what you're doing, i'd give y'all a tip if there was an option"
Stevie Rhodes UK • May 2025
 

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