Antihistamine for Allergy in a Cat

Updated April 17, 2017

Just like humans, some cats will suffer from allergies. In order to treat the allergies, it may be necessary for the cat to take an antihistamine. There are things you need to consider before making a decision as to whether or not you should give your cat an antihistamine.


An antihistamine will treat various symptoms of allergies in cats including hair loss, difficulty breathing and skin irritation.


The most common types of antihistamines given to cats for allergies include chlorpheniramine, cyproheptadine and diphenhydramine. Chlorpheniramine is used to treat a variety of allergy types in cat. Cyproheptadine treats respiratory problems, and diphenhydramine treats dust, flea and pollen allergies.


Each type of antihistamine requires a prescription from a veterinarian. To save money, there are generic forms of antihistamines that a veterinarian may be able to prescribe for your cat.


Treating your cat's allergies with antihistamines will generally help your cat feel better overall.


Some cats may have side effects to an antihistamine, including vomiting and lethargy. It is up to you to discuss with the veterinarian what risks are associated with each type of antihistamine and to make a decision whether giving your cat the antihistamine is worth the risk.

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About the Author

Stormy Lee has been writing professionally since 1997. Many of her articles appear online at various websites. Lee specializes in writing education-related articles and has experience in proofreading and writing reviews for schools in Palm Beach County. Lee holds a master's degree in education from Florida Atlantic University.