An epidural injection is usually highly effective in more recent conditions and has a lower success rate when the problem is longstanding. In a few cases, an epidural injection may offer little or no alleviation of pain. Each patient is different; however, there are times when the injection can be repeated after a few weeks or months to receive the utmost benefit from the medication. If epidural injections do not help to relieve pain, we will probably recommend another therapy. The resons why an injection may not work is if it was incorrectly injected. Do not have a spinal injection without imaging as there is a high rate of miss without imaging. Our experts always perform spinal injections under image guidance using low radiation XRAY or CT Scan.