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Is my dog's nausea & lethargy normal after Clavamox for kennel cough?

Updated on September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Female | spayed | 12 years and 8 months old | 60 lbs

My dog was diagnosed yesterday w kennel cough after a night of several episodes of the classic cough/retch (interestingly, after less than 24 hrs of that she hasn't really coughed anymore). Last night she started Clavamox. Early this morning she woke up kind of restless, & went outside & ate grass, so I assume her tummy was upset. As the day has gone on, she has just been really sleepy & somewhat lethargic. Are these normal responses to Clavamox and/or the kennel cough? Regular vet office closed

1 Answer

Most Helpful Answer

David Elbeze, DVM, MRCVS

Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on June 24th, 2017

Her eating grass and feeling unwell could very well be the clavamox, it is known to cause nausea. try giving the clavamox about 10-15 minutes after a large meal. it can reduce this side effect. the sleepiness could be both the antibiotics and the kennel cough, it's quite normal but she should start feeling better soon.
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