I only did the injection because my insurance required that I fail certain cheaper treatments before they would pay for a THR. (I even had to be offered a cane!) I tried to time it so it would help with my trip but that didn't work. My surgeon also made me wait at least 3 months after the injection before surgery - I don't remember why. But that is something to consider. If you can skip it, there is no real good reason to do it, I think .