A 58-year-old man recently diagnosed with chronic stable angina has discontinued metoprolol due to erectile dysfunction. Medical history also includes hypertension and type 2 diabetes mellitus. The patient's current medications include aspirin, lisinopril, metformin, and sublingual nitroglycerin as needed. BP is 128/76 mm Hg, and HR 88 bpm.
Which of the following is the most appropriate choice to manage the patient's stable angina symptoms?