Yes, Novox and Rimadyl are the same types of drugs that tackle the same problems. They are both treatment options for post-operative pain, arthritis, fever, and joint pain. However, of the two, Novox is the less expensive one. Apart from this, there is not much difference between these two drugs. Both Novox and Rimadyl are used to treat the same problems in dogs. They are both non-steroidal anti-inflammatory drugs (NSAIDs) and also have the same type of effects and side effects in dogs. Even the dosage amounts for both these drugs are similar to one another. With all these similarities, it is easy to conclude that Novox is the same as Rimadyl.