Review Question - QID 109600

A 42-year-old male with a history of schizophrenia presents to his psychiatrist for a normal follow-up visit. He is accompanied by his case manager. The patient was diagnosed with schizophrenia at the age of 27. After being trialed on two different medications, he was deemed to be stable on a third medication which he has been taking for the past 10 years. He reports that he occasionally hears voices. He lives in supportive housing, and his caretakers report that he prefers to be alone but is not disruptive. His temperature is 99°F (37.2°C), blood pressure is 130/90 mmHg, pulse is 105/min, and respirations are 18/min. On exam, he demonstrates a flattened affect and disorganized speech. A funduscopic examination reveals pigmented plaques at the retinal periphery. No deposits are seen in the cornea or anterior lens. This patient has most likely been treated with which of the following medications?