Q. A 62-year-old man with a history of type 2 diabetes mellitus and peripheral neuropathy presents to the emergency department. His chief complaint has been progressive swelling, redness, and pain in his right lower leg over the last two days. He mentions that he had a small cut on his foot approximately a week ago while gardening, which he thought was healing well, but now the area around the cut seems to be the center of the pain. On physical examination, the right lower leg is erythematous, warm, swollen, and tender to the touch. There is also significant edema. His vitals are stable except for a temperature of 100.5°F. Laboratory tests reveal a white blood cell count of 15,000/mm3 with a left shift. His blood glucose level is 210 mg/dL. An ultrasound is performed, which rules out a deep vein thrombosis. What would be the most appropriate next step of management for this patient?