They could possibly be putting you on a declining dose of prednisone for the inflammation. They would start you out on a higher dose, perhaps 60mg or so and then reduce it by about 10mg or so every 5-7 days. There are other things like cortisone they could be using but prednisone would be my guess. It's often used on a temporary basis like I described for a short time when a person is suffering from lots of inflammation. Hope that helps. God bless.
I am not a dr. My statements are based on years of experience and related education. Consult with the professional of your choice regarding matters of concern.