Q. A 43-year-old male presents to the urgent care clinic with a 3-day history of fever, headache, and severe fatigue. He has a dry, hacking cough that has worsened over the last 24 hours. His body aches all over, and his joints feel stiff and painful. He also mentions that he has not received his flu shot this year. On physical examination, he appears fatigued and slightly dehydrated. His body temperature is 39°C, blood pressure is 130/85 mmHg, pulse rate is 110 beats per minute, and respiratory rate is 22 breaths per minute. The chest examination reveals fine inspiratory crackles but no wheezing. The rest of the systemic examination is unremarkable. Laboratory investigations show a leukocyte count of 12,000/mm3 with 80% neutrophils and a C-reactive protein (CRP) level of 15 mg/L. What is the most appropriate next step of pharmacological management for this patient's condition?