Review Question - QID 217010

A 54-year-old woman presents to the emergency department for hemoptysis. She has been having fever, chills, and night sweats for the past 5 days. Her cough developed 3 days ago. Her medical problems include hypertension, hyperlipidemia, and diabetes mellitus. Her medications include amlodipine, chlorthalidone, atorvastatin, and metformin. The patient immigrated from Vietnam 10 years ago. The patient’s temperature is 104.9°F (40.5°C), blood pressure is 132/72 mmHg, pulse is 102/min, and respirations are 22/min. Physical exam reveals an ill-appearing woman with crackles auscultated in the right upper lung field. Sputum cultures reveal acid-fast bacilli. She is started on the standard course of treatment for her condition. She returns 1 week later complaining of discoloration of her contact lenses. Which of the following is the most likely cause of this finding?