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 62-year-old man comes to the physician for hematemesis and progressive heartburn over the past 5 days. Ten days ago, he was started on a medication to treat a condition that causes hearing difficulties and pain of the lower legs. He has no other history of serious illness. He has smoked 1 pack of cigarettes daily for the past 20 years. Physical examination shows bowing of the tibias. Upper endoscopy shows inflammation of the mucosa and a 1-cm punched-out ulcer in the distal esophagus. Which of the following drugs is the most likely cause of the patient's current condition?
assistant
Risedronate