A 48-year-old woman comes to your primary care clinic complaining of a facial rash,joint pains and photosensitivity. In the review of systems, she reports fever, hair loss, headaches, flushing, palpitations, feeling low, tingling sensation in both feet and peripheral edema. While reviewing her medications, she informs you that she started on a new medication 4 months ago. On physical examination, you observe that the patient has flushing of her cheeks with a distinct butterfly rash over her nose and cheeks. Her temperature is 99 °F (37.2 °C), heart rate is 108 beats/min, blood pressure is 148/98 mm Hg, respirations are 19 breaths/min, and oxygen saturation is 98% on room air. Laboratory studies are significant for the presence of anti-histone antibodies. Which of the following medications is most likely causing her distress?
