Trans-foraminal Lumbar Epidural Injection of Dexmedetomidine Against Magnesium Sulfate When Combined With Dexamethasone in Uni-lateral Lower Limb Radicular Pain. Multi-centeric Comparative Study

Inclusion Criteria: * Age group. 25-75ys old * Both sex. * Lumber disc protrusion at one or two segments on MRI. * Chronic lumbar radiculer pain for more than 6 weeks refractory to * medical treatment for at least 4 weeks. . * Positve leg rising test at 30-70 degrees. Exclusion Criteria: * Diabetic candidates ( type Ior II). * Patient refusal. * MRI with disc sequestration. * Neurological examination revealed foot drop, neuropathic ulcers * Myelopathic or scoliotic patients, . * Coagulopathic patients ( cirrhotic patients, on anti-coagulation )