Diagnostic injections are typically performed with local anesthetic and contrast. Response to the injection can be determined shortly after to the procedure given the rapid onset of local anesthetics which cannot be achieved with steroids. There is risk of including steroids in diagnostic injections as if the injections are negative, it may expose joint to steroids unnecessarily. There is a lack of consensus in the literature on the optimal injectant for diagnostic injections. Some providers advocate allowing steroids in the second diagnostic injection so it can provide both diagnostic and therapeutic benefits as well. The duration between injections should be reflective of expected duration of response to the injectant used. That means if steroids are added to second diagnostic injection it should be expected to last about three months.