I personally feel if the dog is just getting arthritis, jumping into drugs… not so dog friendly.
I have had SUPERB luck with something as cheap and safe as Bromelain. It acts as a natural NSAID and, btw, I take it myself.
Adequan.. lol I am one of the first people that had a vet use it off label for dogs. Back over 15 yrs ago it was only for horses, but I had a dog with CHD. The vet gave me the medications and had me do massive (about 3 x the number of shots and double the current dosage) injections for my Rottweiler. Later we used it with very good results on my old rescue pony. Adequan basically helps the synovial fluid which helps buffer joints from rubbing. It helps some but not all arthritis. I suggest you give it a try... fairly safe and with long lasting results.