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 54-year-old woman presents with acute pain in her left toe. She says she hasn’t been able to wear closed shoes for 2 weeks. Past medical history is significant for gastroesophageal reflux disease, diagnosed 2 years ago. The patient is afebrile and vital signs are within normal limits. Her BMI is 31 kg/m2. On physical examination, the left toe is warm to touch, swollen, and erythematous. A joint fluid aspiration from the left toe is performed and shows needle-shaped negatively birefringent urate crystals. The patient is started on a xanthine oxidase inhibitor. On her follow-up visit 6 weeks later, she has an elevated homocysteine level, a decreased serum folic acid level, and a normal methylmalonic acid level. Which of the following drugs would most likely cause a similar side effect to that seen in this patient?
assistant
Azathioprine