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My dog took Rimadyl. Can he start Prednisone after 24 hours?

Updated on September 23rd, 2025

Pet's info: Dog | Boxer | Male | neutered | 11 years and 10 months old | 75 lbs

My dog was diagnosed with lymphoma. He had taken rimadyl and vetprofen. He now has a prescription for Prednisone. The vet said to wait 24 hours after his last rimadyl and then begin the Prednisone. Is that too soon to begin the Prednisone? I do not want him to have an adverse reaction but I hate seeing him so uncomfortable.

1 Answer

Most Helpful Answer

Sara Farmer, DVM

Answered By Sara Farmer, DVM

Veterinarian

Published on November 19th, 2019

While a washout period is recommended between NSAIDs like Rimadyl and corticosteroids like prednisone the actual number of days to wait has not been determined by a research study. I typically recommend a 7 day washout but there are many times I have started prednisone right away when I thought it necessary. You could ask your vet about using gastroprotectant medications like antacids to help lessen the likelihood of side effects.
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