I don't do alot of joint injections but some. More IA hip injections that any others. I saw a post by a well respected academic pain doc recently indicating that he performs IA steroid injections of the hip in a series of three at two week intervals. I have always done one injection. If it lasts for a while - great. If it doesn't and it is > 3 months I will consider repeating but I will also tell you to get the joint replaced. Am I missing something?