My sister is getting cortisone shots. There's some indication that one shot and the pain is gone "forever". Uh, not true. In her case, it has pain for a while after the shot, couple days maybe? Then it gets better for a while. But *not* "forever"! Several months, many months, it varies and she's much more comfortable but again, not "pain free" either. However she feels that it's worth it since it helps for a relatively long time. That's her situation and your situation is obviously different so find out about it and make your decision.
When asked what advice she would offer to other dog owners, Catherine suggests that owners never assume that their dog is allergic to just one thing. If the dog has allergies, they are usually allergic to several different elements. She also suggests that if dog owners decide to use Prednisone, they should go with the lowest dosage available and look into giving them milk thistle to prevent against liver damage. Owners should be open to trying new medications and therapies and never give up. It’s important to try everything they can to keep their pup as comfortable as possible.