I have a question about this patient. Myron, a 70-year-old tennis player, comes to the clinic for a checkup. He takes one antihypertensive medication. He is retiered, financially stable, and of normal weight for his height. His gait is confident but somewhat uneven as he steps more rapidly on the left leg than on the right. It is a very warm day and you observe him taking a quick drink from the fountain as he comes into the exam room. You begin by taking his vital signs: Blood pressure 160/90 Temperature 100 oral Respiratory rate 22, inaudible, even Pulse 92 Why would his blood pressure be elevated if he is taking an antihypertensive mediation? Please help me understand this