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 20 January 2027. 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
"Been using inhouse for about 6 years now and they've never let me down. On one occassion I was unable to get my parcel so I assumed I had lost money, but two weeks later they refunded me. Great company."
Katie Heys UK • June 2025
Heart Icon
"Always had excellent customer service and have been using this company for many years."
Carole UK • January 2025
Heart Icon
"There's a reason I always come back to you for my meds; it's your customer service and your quality of products. Thanks for all you do! :) I love doing business with you all, thanks."
Anthony MO, USA • May 2026
Heart Icon
"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
Heart Icon
"Thank you so very much. I appreciate all the help & responses that you've provided. Its not often that companies go that extra mile but you have & Im truly grateful for it."
Melissa Reiger GA, USA • July 2025
Heart Icon
"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
Heart Icon
"Inhouse Pharmacy are great. So reliable and a great range of products. Keep at it!"
Philip Honey UK • September 2025
Heart Icon
"My total experience with Inhouse Pharmacy is I can trust you guys to the moon and back."
Janelle FL, USA • May 2026
Heart Icon
"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
Heart Icon
"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
 

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