IIRC, the vet used marcaine and depo-medrol when he did Keebler. I sincerely doubt there have been head-to-head studies of different combinations of medications, however. You sort of have to ask the vet what he/she uses, and why.
I do know there is a difference in joint injection medications, but I'm not well-versed in them (still learning/researching myself). Obviously, the more expensive the product used, the better it will be for the joint. Your vet should be able to give you some options and explain the differences.
the more expensive the product used, the better it will be for the joint
LOL, do you work for a pharmaceutical company by any chance? I'm pretty sure that the price of a drug has diddly poo to do with efficacy, in general. Expensive may mean NEWER, but that doesn't always mean BETTER.