50-soomeyr old male comes into ED complaining of extreme left lower extremity pain, shooting from his left lower back to his left foot, going on for the past 3 weeks. The pain is described as ’10/10′, throbbing in nature, persists through walking and at rest and ‘is unbearable’–it keeps the patient from sleeping and has made him depressed. No appreciable weakness or numbness in any extremities. The patient has tried taking oxycodone 30mg every 4 hours, with minimal benefit. Of note, the patient tried cocaine yesterday in hopes of alleviating the pain–that also did not help.