Review Question - QID 217816

A 79-year-old man comes into the clinic due to dizziness and near falls. He says that the dizziness is worst in the mornings when he gets out of bed. During these episodes, he feels
lightheaded and that his “vision goes black.” He has a history of hypertension and benign prostatic hyperplasia. He takes amlodipine, terazosin, and acetaminophen occasionally for joint pain. Temperature is 37 C (98.6 F), blood pressure is 104/65 mm Hg, pulse is 95/min, and respirations are 14/min. The patient appears well-nourished and in no acute distress. Heart sounds are regular without murmurs. The lungs are clear to auscultation bilaterally. Strength is 5/5 for lower and upper extremities. Reflexes are normal. ECG shows no abnormalities. Orthostatic vital signs are taken and the patient is diagnosed with orthostatic hypotension. Which drug that is he taking is causing his orthostatic hypotension?