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How long can my dog safely take cephalexin without causing issues?

Updated On September 23rd, 2025

Pet's info: Dog | Dalmatian | Female | spayed | 16 years and 10 months old | 40 lbs

how long can you safely administer cephalexin to dogs?

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on November 22nd, 2016

Cephalexin is a safe antibiotic and I am not aware of any side effects of long term usage. Using an antibiotic for a long period of time can however result in antibiotic resistance which is a major problem for animals and people. It is difficult to say how long is too long when you're talking about risk for antibiotic resistance. There are general guidelines regarding safe and prudent antibiotic usage - talk to your vet if you have concerns.

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