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Why is my dog so lethargic after taking Clavamox for bronchitis?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered

Does Clavamox make a dog sleepy? My boy is on it for bronchitis. He's done nothing, but drag all day.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on November 19th, 2016

Yes, lethargy can be a side effect of Clavamox, and it could also be a side effect of Higdon from feeling so ill from bronchitis. He should start feeling better in a couple of days from the antibiotic, so if he is still lethargic in another 72 hours, I would take him back into the vet for an exam.

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