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My dog is straining from a UTI. How long does Clavamox take to work?

Updated On September 23rd, 2025

Pet's info: Dog | Bulldog | Male | unneutered | 1 year and 3 months old | 51 lbs

Vet suspects Bronx has a UTI. He is straining to urinate. Occasionally a spurt will come out, but most of the time it is nothing or just drops. Vet gave him Clavamox (waiting on urinalysis - blood work was normal). Question is how long does it typically take for this clavamox to alleviate the straining and let him get some relief. So hard to watch him not get relief.

1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on August 24th, 2017

That would depend on the underlying cause. If the UTI is caused by an infection, Clavamox will be effective pretty quickly and in 48 hours you will start to see improvement. If not caused by an infection (but to other cause like urinary crystals or stones for example), Clavamox may be effective for few days but signs will come back. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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