Medical Treatment: Alpha blockers, e.g.: *Doxazosin, oral, 4 mg daily. Dose increase above 8 mg daily to control blood pressure may be required. Calcium channel blockers may be added, e.g.: *Amlodipine, oral, 5-10 mg daily Patients should not be given diuretic therapy unless pulmonary oedema is present.
When to refer: * All patients with elevated levels of NMA and VMA for localisation studies (MIBG scanning and CT scanning). * When there is a suggestive clinical presentation but negative screening test.