A 39-year-old man recently diagnosed with hypertension is now in the emergency room in an acute confusional state and with critically elevated blood pressures. He has been having episodes of palpitations, headaches, and lightheadedness. His medication was recently changed from clonidine to metoprolol. His examination is significant for dilated pupils, papilledema, and bounding peripheral pulses. The urine drug screen is negative. The CT scan of the head is normal, and CSF studies show no evidence of hemorrhage or infection.
What is the most likely diagnosis? What is the underlying etiology? What is the next step? *This case is from Docplexus editorial team for educative purpose only Source: Case Files-Internal Medicine Correct answer posted in the comment section. Click here.