Veterinary questions? Ask a Vet for Answers ASAP
Hi, Welcome to Just Answer. I'm Chris, a small animal Vet based in the UK. I will review your question and get back to you ASAP with a response
Sorry to hear that your Frenchie has been having back problems. Onsior belongs to a class of drug known as non steroidal anti-inflammatory drugs (NSAIDs) so is a good choice to use when there is pain and/or inflammation. If the onsior alone is not controlling the pain then a second pain killer may be added in, this could be an opoid like tramadol or something like gabapentin if nerve related pain is suspected. These are things that your vet can prescribe if they felt it was appropriate, however he may also need further investigation regarding the cause of his pain.
Hope that answers your questions, please let me know if there is anything else I can do.