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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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"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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"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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"Great service, never had a problem"
Kimberly NM, USA • August 2025
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"Package received! I want to thank you on behalf of my family for your wonderful service. My daughter cannot purchase domperidone in the States, and it is critical to her health. You have been a lifesaver. Thank you for making this drug available to her, and for the competent and courteous service your company provides. We are all grateful."
Rebecca McClear MI, USA • October 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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"You guys are honestly top notch, especially in a world where access to healthcare is being constantly gate kept, you all are a force of good in that fight. Thank you! You guys really are the best! Please don't change."
Shane MI, USA • May 2026
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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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"My experience with Inhouse Pharmacy in Vanuatu was smooth and efficient from beginning to end. I found the instructions on the website easy to understand and follow. I was also able to get phone information easily. I would offer one suggestion: that the office hours and time zone be indicated on the website. Furthermore, I was kept abreast of my order status, and the order arrived safe and sound right around the time I was told it would. I would not hesitate to order products from Inhouse again. Thank you."
Taylor NM, USA • June 2026
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"Your company has been a Godsend to me at times when I had no insurance, etc. Your service is wonderful & I’m grateful to you. I have used your service for quite a few years & I have never had a complaint."
Gwendolyn Shivers CA, USA • May 2026
 

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