FCEM2-0535
A 48-year-old presents to the emergency department complaining of severe headache, excessive sweating, and episodes of blurred vision. The triage observations are as follows:
Blood pressure: 234/138 mmHg
Pulse rate: 106 bpm
Respiration rate: 18 bpm
Oxygen saturations: 97% on air
Temperature: 37.3ºC
The patient informs you that they have been referred for hypertension investigation and are awaiting the results of a 24-hour urine collection. You come across a letter from one of the cardiologists who requested a 24-hour urine collection for catecholamines, metanephrines, and normetanephrines due to suspicion of phaeochromocytoma.
Which of the following medications would be the most appropriate choice to lower the blood pressure in a patient with phaeochromocytoma?