Patients agreeing to participate in the study will come to the pre-operative room of the Pain Department at the designated time. There they will be monitored, initial intensity of the pain (0 to 10) on the numerical rating scale (NRS) will be recorded and pre-operative vital signs assessed (e.g.- blood pressure, heart rate, oxygen saturation). Each patient will complete the Roland Disability Questionnaire and the Oswestry Disability Index score. All syringes with the solutions to be injected by the transforaminal approach will be prepared prior to entering the operating room. After that the patient will enter the operating room to undergo pulsed radiofrequency treatment. The patient will sign consent for the procedure. The patient will be placed in the prone position with a pillow under the lower abdomen to provide an easy transforaminal approach. It will be forbidden to call name or the dose of any medication which will be injected during the procedure except the 1.5cc of Midazolam IV that will be given for light sedation. Fluoroscopy will be used to identify the specific site of the injections and radiofrequency in all cases. After sterile preparation of the needle insertion area, the skin will be infiltrated with 1% Lidocaine, and a 22-gauge, 4-in radiofrequency needle with a 10 mm curved active tip will be advanced under fluoroscopic guidance. Anatomic landmarks will be identified, and the needle will be positioned closely to the dorsal root ganglion under fluoroscopy guidance. The tip of the needle will be placed in the dorsal-cranial quadrant of the intervertebral foramen on the oblique image, and the tip will be positioned between one-third and halfway to the pedicle column on the antero-posterior image. If intravenous uptake will be occurred, the needle will be repositioned until intravenous uptake was absent and an epidural flow pattern was achieved. If intra-arterial, intrathecal, or intradiscal flow will be identified, the procedure was aborted. After confirmation of epidural spread (using a contrast dye) and the radiofrequency needle positioning adjacent to the appropriate dorsal root ganglion, 1 cc of normal saline will be injected to decrease electrical impedance around the radiofrequency needle. Then the stylet will be replaced by the radiofrequency probe and the probe will be connected to the radiofrequency generator. Defining the final position of the radiofrequency probe will require a sensory stimulation (50 Hz) threshold ≤0.5 V, which will create paresthesia corresponding to the existing distribution of the patient's radicular pain. Then in the two groups of patients two cycles of pulsed radiofrequency will be performed at 42°C for 120 seconds. Immediately after the radiofrequency treatment in the Celestone group the solution of 1 cc of Lidocaine 1% with 1 cc of Celestone Chronodose will be injected around each dorsal root ganglion through the radiofrequency needle. In the control group the solution of 1 cc of Lidocaine 1% with 1 cc of normal saline will be injected.