Metanephrine - Free

The Metanephrine - Free test checks for rare tumors called pheochromocytomas and paragangliomas. These tumors can cause the adrenal glands to release too much of the body's stress hormones: epinephrine (adrenaline) and norepinephrine (noradrenaline). When these hormones break down, they form substances called metanephrines. This test measures the level of free metanephrines in the blood.

Doctors may suggest this test if signs of excess adrenaline-like hormone are present or if a tumor like pheochromocytoma is suspected based on symptoms or scan results. It is also used to monitor individuals who have had these tumors in the past. This test can be done if there are symptoms like high blood pressure that comes and goes, a fast heartbeat, headaches, and sweating. 

An overnight fast for 8–12 hours is required before the test. However, drinking water is acceptable. Do not consume foods like bananas, pineapples, chocolate, coffee/caffeine, ice cream, vanilla, potatoes, B-complex supplements, high-cereal diets, nicotine/tobacco, and alcohol for at least 48 hours before sample collection. Also, avoid strenuous exercise and stress for at least 24 hours before collection. It is advised to rest quietly by lying down for 20–30 minutes before blood collection.

Do not stop prescribed medicines without your doctor's advice and inform the laboratory and your doctor about all medicines and supplements you are taking. Some medicines can affect results (e.g., certain antidepressants, decongestants/sympathomimetics, amphetamines, labetalol, sotalol). A doctor's prescription is required for the test. 

Test result ranges are approximate and may differ slightly between labs depending on the methodology and laboratory guidelines. Do not self-medicate, and always consult a doctor to understand the test results correctly.

Please note: This is an outsourced test. The sample for this test is collected by TATA 1MG and processed at a NABL accredited partnered lab.