Additionally, it is used to treat surgical pain and to reduce fever.. Deramaxx is used to control inflammation and pain in dogs. Rimadyl is rimadyl chewable tablets 100mg 30ct btl an anti inflammatory (NSAID) that does not contain steroids, and is used to treat inflammation and pain as a result of arthritis and other joint disease, including hip dysplasia. Deramaxx is available as chewable, scored, beef flavored tablets. You must have a prescription from your veterinarian to order Deramaxx.. It is especially effective against rimadyl chewable tablets 25mg 180ct btl osteoarthritis, which is a degenerative disease that affects your dog's joints.