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What antihistamines are safe for cats

The most commonly prescribed antihistamines are the ones that are safe for cats. These include loratadine (Claritin), cetirizine (Zyrtec), and levocetirizine (Xyzal). These are safe for cats because they have a very short half-life in the body and the first-pass effect is low. The half-life of these drugs in cats is approximately 16 hours.

Can antihistamines cause problems for cats?

Treating your cat with an antihistamine for a few days may cause a temporary decrease in your cat's appetite and urination. Your cat may also become lethargic, particularly if he is taking a sedating antihistamine like doxylamine.

If your cat is taking an antihistamine and you notice any side effects, call your veterinarian right away.

How much do antihistamines cost?

The cost of antihistamines varies. Most commonly, the cost is $5 to $10 per month.

Can my veterinarian prescribe me an over-the-counter antihistamine?

Some over-the-counter antihistamines are safe for cats. These include fexofenadine (Allegra), cetirizine (Zyrtec), and loratadine (Claritin).

How can I tell if my cat is allergic to antihistamines?

Your veterinarian can test your cat for antihistamine sensitivity. This is usually done by using a skin test or blood test.

If you're considering using an antihistamine for your cat, you should discuss it with your veterinarian. If your cat is tested and is found to have an allergy to antihistamines, you will have to stop using them.

Can my cat get a urinary tract infection from taking antihistamines?

No. It is safe to use antihistamines to treat a urinary tract infection in cats.

More Information

To learn more about treating your cat with an antihistamine, see the following articles:

This article was written by a Veterinarian.

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