United States / USD Country & Currency
Country
United States
Currency
US Dollars
Save
Country
Australia
Gibraltar
Hong Kong
Malta
Northern Ireland
Puerto Rico
Scotland
Singapore
Switzerland
United Kingdom
United States
Currency
US Dollars
GB Pounds
AU Dollars
Euro
Explore our range Categories
Ask us a question 877-271-6591 or 800-868-9064
U.S. Shipping Update: We are continuing to accept and ship orders to the United States.
New U.S. customs requirements take effect from 22 October. Read our full update for what this means for your order.

Shipping delays due to Covid-19 Virus

Please fill the form to receive updates when we can ship your order.

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.
Read more
5 Stars

Customer Review

Hear from more than 1000 happy customers!
Heart Icon
"Ordered from you many years ago at your old website. Was very satisfied with your service then. Found you when I downloaded my bookmarks to a newer laptop. Put you in my favourite category."
Robert Lypka NC, USA • June 2025
Heart Icon
"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
Heart Icon
"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
Heart Icon
"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
Heart Icon
"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
Heart Icon
"Since 2003, Inhouse Pharmacy has continued to exceed my expectations of quality customer service. To date, I've experienced only one issue related to goods in transit, which was quickly remedied by Inhouse Pharmacy's customer service team. Whenever I have requested assistance from their staff, they have always been courteous, friendly and professional. I cannot fault their service. 10/10 stars, please keep doing what you are doing!"
Mateja NSW, AU • May 2026
Heart Icon
"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
Heart Icon
"Always had excellent customer service and have been using this company for many years."
Carole UK • January 2025
Heart Icon
"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
Heart Icon
"Great Service for over a decade! Thank you, Inhouse Pharmacy!"
Lisa Button WA, USA • September 2025
 

This website uses cookies. View our policy and select your preferences here