A 72 year-old male presents to the emergency room with severe chest pain, nausea and vomiting. His past medical history is significant for hypertension and he has been taking lisinopril 20 mg daily for hypertension. His ECG displayed ST segment elevations in precordial leads. Lab tests revealed elevated troponin. His temperature is 99 ⁰ F, heart rate is 97 beats per minute, respiratory rate is 17 breaths per minute, and blood pressure is 220/140 mm Hg. Which of the following is the most effective way to reduce his blood pressure?