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My dog just got neutered. Are human meds safe? What's green fur?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 2 years and 3 months old | 32.63 lbs

Bailey just got neutered today & was prescribed w/ Co Amoxiclav tablet & Mefenamic Acid 500mg Capsule. Vet said i could just buy the medicines that are for humans & I just want to make sure that they will be safe for Bailey because i thought human medications are bad for dogs. Also, i just noticed that there's a greenish color in his fur near his anus and am curious if it's normal and was part of the procedure. Will also consult about this with the vet 1st thing in the morning (1am atm). Thanks!

1 Answer

Most Helpful Answer

Jenna Beyer, DVM, MBA, cVMA

Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on June 5th, 2019

The green on the fur around Bailey's anus looks a bit like he may have had diarrhea. Keep an eye on his next bowel movement, and if he has diarrhea persisting more than 24 hours, call the vet. Amoxi/Clav is the same thing as Clavamox used for both humans and pets, and should be safe for dogs as prescribed. Mefenamic acid is a human NSAID that is not commonly used in veterinary medicine. It's use in dogs would be off-label and it's safety in pets has not been tested. There are several options for NSAIDs that have been specifically approved as safe for dogs, so I would discuss these with your vet.
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