Epinephrine (Adrenaline) in Plasma

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like rapid heartbeat, high blood pressure, or severe anxiety that suggest your body is releasing too much epinephrine. It may also be used in cases of suspected adrenal gland disorders, pheochromocytoma (a rare tumor), or during stress-related conditions like panic attacks or severe allergies.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for 8–12 hours before the test if it involves a blood draw, but this depends on your provider’s instructions. Avoid caffeine or nicotine for several hours before testing, as they can affect results.

How the Test Is Performed

A healthcare professional will draw blood from a vein in your arm using a small needle. The blood sample is then sent to a lab for analysis using a sensitive immunoassay method to detect epinephrine levels.

What the Results Mean

Results are typically reported as a concentration in nanograms per milliliter (ng/mL). High levels may indicate conditions like pheochromocytoma, severe anxiety, or adrenal gland tumors. Low levels might suggest adrenal insufficiency or other hormonal imbalances. Your provider will interpret results in the context of your symptoms and medical history.