A 47-year-old male presents with back pain of 2 weeks duration. He denies night sweats, fevers, or weight loss. He localizes his symptoms to a dermatomal distribution along the rib cage on the right. On physical exam he has mild paraspinal tenderness, normal patellar reflexes, normal muscle strength in his lower extremities, and a normal gait exam. An MRI is shown in Figure A and B. What is the most appropriate first step in management?