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Could my old dog's methionine medication have caused his passing?

Updated on September 23rd, 2025

Hello. I just recently had to put my older pet down and I'm just trying to figure out if maybe the medication he was on could have caused it. His name was Sam and he was 15 years of age. He had a bladder infection in July if 2019 and the vet decided to start treating him for Struvite crystals and put him on Methionine. After his bladder infection went away the vet did a urinalysis and it showed no crystals however they said to keep giving him the methionine.

1 Answer

Most Helpful Answer

Dr. Strydom, DVM

Answered By Dr. Strydom, DVM

Veterinarian

Published on February 25th, 2020

I'm so sorry to hear that you had to put your dog down. I know that is never an easy decision.

I doubt the methionine has anything to do with his passing but of course, there is no way for me to know this for sure. Anything is possible. I do not have enough information though to be helpful. You did not say why you had to put your dog down, what symptoms he was having, etc. Personally, I think if the methionine was to cause an issue it would have happened sooner than 7 months after him taking it unless he had a pre-existing liver, kidney or pancreatic disease.

( https://www.petplace.com/article/drug-library/drug-library/library/methionine-for-dogs-and-cats/ )
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