These injections can be administered either in a transforaminal or an interlaminar fashion under fluoroscopic image guidance. Transforaminal injections allow for a more precise placement of medication at the site of disc or nerve root inflammation. Interlaminar injections allow for a greater spread of medication to a particular area in the epidural space. During the performance of an epidural injection procedure several medications are utilized. These include a contrast agent to confirm proper flow of medication prior to injecting any therapeutic medications, a local anesthetic (to provide comfort, diagnostic information, and to assist controlling inflammation), and a corticosteroid (the primary medication responsible for controlling nerve root swelling, inflammation, and pain). For more information on epidural injections in the non-surgical treatment of spinal pain, please review this patient information link here.