The Nor-Adrenaline (Nor-epinephrine) Urine test measures levels of nor-adrenaline, a hormone and neurotransmitter, in urine to assess adrenal function and detect disorders related to the adrenal glands, such as pheochromocytoma. Elevated levels may indicate excessive adrenal activity, helping diagnose stress-related or catecholamine-secreting tumors.