Q. A 20-year-old African-American man with a known history of sickle cell anemia is brought to the emergency department by his girlfriend for severe pain in the left arm from yesterday. He describes the pain as sharp, throbbing, and constant, progressively worsening over the past 24 hours. He has taken Oxycodone 10 mg twice yesterday as per the earlier physician’s prescription. His girlfriend requests a quick treatment as she has to leave for a party. Her temperature is 98.6°F (37°C), heart rate is 100/min, respiratory rate is 16/minute and BP is 128/80 mm of Hg. On examination, the patient is in distress and has tenderness over his left arm with a slight rise in temperature. Neurovascular examination shows intact pulses and sensation. What is the next best step in this patient’s management?