A 59-year-old man presented to clinic with concerns that his ezetimibe prescription was causing an itchy rash. The rash first appeared on his hand 1 year ago and now it involves his arm, as well. The man's past medical history is significant for coronary artery disease, hypertension, hyperlipidemia, and hypothyroidism. He has tried a topical antifungal agent and oral fluconazole to no avail.