system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 68-year-old man comes to the physician because of a 3-month history of anorexia, weight loss, and cough productive of blood-tinged sputum with yellow granules. Four months ago he was treated for gingivitis. He has smoked 1 pack of cigarettes daily for 40 years. Examination shows crackles over the right upper lung field. An x-ray of the chest shows a solitary nodule and one cavitary lesion in the right upper lung field. A photomicrograph of a biopsy specimen from the nodule obtained via CT-guided biopsy is shown. Which of the following is the most appropriate pharmacotherapy?
assistant
Penicillin G