Couple things -
First - Your pup shouldn't need to be on anything for pain for a very long time. So, he so be off the Rimidyl before long.
Second - It probably wouldn't hurt your dog to be somewhat tired and lathargic for a while - after breaking his leg. I'm sure your vet would like him to be as calm as possible for a while.
Third - If your pup needs to be on this drug for a longer period of time - and continues to be tired, check with your vet - because many dogs take this drug every day always - with rheumatitis, etc. And, they get back to better-than-normal activity. However, your vet may be giving your pup a little stronger dose right now.
Good luck! Carol Jean |