Normetanephrine

Methoxycatecholamines are inactive metabolites of catecholamines - epinephrine and norepinephrine. Methanephrine is a derivative of norepinephrine. Catecholamines are hormones produced by the medulla adrenal glands. In addition, catecholamines are also secreted by tumors chromogenic tumors, and this consequently leads to an increase in blood pressure arterial pressure. Determination of free methoxycatecholamines in plasma is useful in the diagnosis of catecholamine-secreting tumors a also in assessing the cause of hypertension.