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 69-year-old man comes to the physician because of a 3-month history of urinary urgency, nocturia, and progressive pain in his lower back. The pain is worse at night and does not respond to ibuprofen. Rectal examination shows an enlarged, asymmetric prostate with a nodular surface. Prostate-specific antigen concentration is 11 ng/ml (N < 4). A biopsy of the prostate shows a high-grade adenocarcinoma. A CT scan of the pelvis shows multiple osteoblastic lesions of the lumbar spine. The patient is started on a drug that competes with androgens for interaction with the testosterone receptors. Treatment with which of the following drugs was most likely initiated in this patient?
assistant
Flutamide