Non-ionic IV contrast may be safely administered in these patients based on Bessell-Browne et al, CT of Pheochromocytoma and Paraganglioma: Risk of adverse events with IV administration of non-ionic contrast material, AJR 2007; 188: 970-974 and the ACR manual. No follow-up blood pressure monitoring is needed. Direct injection of contrast medium into the adrenal or renal artery is to be avoided however, as this may cause a hypertensive crisis.