A 69-year-old man is brought by his son to the emergency department with weakness of his right arm and leg. The man insists that he is fine and blames his son for “creating panic”. Four hours earlier the man was having tea with his wife when he suddenly dropped his teacup. He has had difficulty moving his right arm since then and cannot walk because his right leg feels stiff. He has a history of hypertension and dyslipidemia, for which he takes lisinopril and atorvastatin, respectively. He is allergic to aspirin and peanuts. A computerized tomography (CT) scan shows evidence of an ischemic stroke. Which medication will his provider order to prevent future ischemic strokes? A. Abciximab B. Alteplase C. Urokinase D. Celecoxib E. Clopidogrel