Image of the Week: Which drug might prevent this condition?

A 63-year-old man presents with pleuritic chest pain, fever, and dyspnea. He underwent a coronary stent implantation five weeks earlier following a myocardial infarction. He is febrile and a pericardial friction rub and tachycardia are noted on examination. Investigations reveal an increased white blood cell count, an enlarged cardiac silhouette on chest X-ray, and a pericardial effusion on echocardiography. Which ...