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Review Question - QID 212847

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QID 212847 (Type "212847" in App Search)
A 45-year-old-man presents to the physician with complaints of intermittent episodes of severe headaches and palpitations. During these episodes, he notices that he sweats profusely and becomes pale in complexion. He describes the episodes as coming and going within the past 2 months. His temperature is 99.3°F (37.4°C), blood pressure is 165/118 mmHg, pulse is 126/min, respirations are 18/min, and oxygen saturation is 90% on room air. Which of the following would be the first medication given to treat this patient’s most likely diagnosis?