<prompt> Answer this question truthfullyWhat is the medical treatment for pheochromocytoma?  <response>: <reason> Preferred regimen 1: IV Sodium nitroprusside 0.3 to 0.5 mcgkgminute; maximum dose of 10 mcgkgminute for 10 minutes. The rate of a prolonged infusion should be no more than 3 mcgkgminute to avoid cyanide toxicity. Preferred regimen 2: IV Phentolamine non-selective alpha-adrenergic blocker 1 to 5 mg bolus; maximum single dose: 15 mg. The response to phentolamine is maximal in two to three minutes after starting of the initial dose. Preferred regimen 3: IV Nicardipine calcium channel blocker 