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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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5 Stars

Customer Review

Hear from more than 1000 happy customers!
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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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"I have ordered with Inhouse for many years. They've always been excellent. Even after emergencies when we needed things in the past, I've never been let down. They've always been lovely to me and I just feel like I'm getting things from friends. So, I love Inhouse! There hasn't been anything bad, so it would be a new one if there ever was. The goods have always been delivered as seen and priced as advertised, and replaced if necessary. So, it's a straight 5-star award."
Gina UK • June 2026
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"Always great products and service and I have been coming back for over 20 years now! THANK YOU"
Cathy Lees OK, USA • June 2025
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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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"Dear Pharmacist, I want to extend my sincere appreciation for your professionalism and kind demeanour regarding my medication. I received it today, Monday, May 18 and in fewer than two weeks!! Remarkable. Please extend my thanks to the team. You are an asset to your profession. Thank you once again. I look forward to ordering again with your entity in the future."
MaryAnn Ulander NV, USA • May 2026
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"I've been an Inhouse customer for over 20 years. Exemplary customer service and very responsive if you have any questions or need any assistance with your orders!"
Dave MI, USA • May 2026
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"I am so fortunate to have found this company for my medication. I have used other entities, but they fall well below your efficient customer service, ease of ordering through the website and quick receipt of my meds. It is so hassle-free. Thank you for all your assistance with my health needs."
MaryAnn Ulander NV, USA • February 2025
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"Inhouse Pharmacy are great. So reliable and a great range of products. Keep at it!"
Philip Honey UK • September 2025
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"I'll definitely be ordering from you again. Communication is super, better than any other company. Ordering was super easy. Thanks again. Gloria"
Gloria Bach NY, USA • April 2026
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"Hello, just a quick message to compliment you & your staff on maintaining such a high quality service. I have been a satisfied customer for too many years to count. While outside events ( an order seized by Customs) your company has kept every promise & made sure things were done to ensure delivery of products. I just want you to know that I can't think of any other company that is as excellent as Inhouse. The products offered are of top-notch quality. The customer service is incredibly effective & gracious in all communications. The updates on the order are wonderful, I know exactly how my order is moving thru the stages: order received/ order arranged for delivery/ order ready for mailing, tracking # given. It just hits all the check ✔️ marks. You folks blow other companies out of the water, just by doing things "right" & keeping communication lines open at every step.!! I appreciate you, & the other team members more than u will ever know. God Bless. "
Sandy Baker Michigian, USA • May 2026
 

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