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My cat has worms. Can I safely give him expired worm medicine?

Updated On September 23rd, 2025

My cat had worms in his vomit. I have worm medication but it's a little over a year expired. Would it be safe to give to him?

1 Answer

Most Helpful Answer

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on August 26th, 2017

The expired dewormer will probably not harm your cat but it may not be very effective. I would recommend taking a stool sample to your vet to be checked and have them recommend a dewormer that will cover whatever specific parasites your cat has. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

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