Updated On September 23rd, 2025
Pet's info: Cat | Domestic Shorthair | Male | neutered | 10 lbs
How soon will my cat feel relief when using zyrtec?
1 Answer
Published on November 30th, 2018
It should begin to work within a couple hours of administration. The half life allows for once daily dosing in cats. That said, not all antihistamines are effective in every cat. You must find the one that is most effective for your cat.
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