Epinephrine (serum/plasma concentration)

Why This Test Is Done

Your doctor may order this test if you have symptoms like rapid heartbeat, high blood pressure, or unusual energy levels that suggest your body is producing too much or too little epinephrine. It can also be used to check for conditions such as pheochromocytoma (a tumor affecting hormone production) or adrenal insufficiency.

What to Expect Before the Test

No special preparation is needed unless instructed by your doctor. You may be asked to fast for a few hours before the test, depending on the lab’s protocol. Bring any medications you’re taking to your appointment.

A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a slight pinch, but it usually doesn’t cause discomfort. The blood sample is then sent to a lab for analysis.

The blood sample is tested using an immunoassay method to detect and measure the concentration of epinephrine in your serum or plasma.

You can return to your normal activities immediately after the blood draw. There may be a small bruise or redness at the injection site, but this usually fades within a day or two.

Results may take a few days to a week to be processed and reviewed by your doctor. They will discuss the findings with you during your follow-up visit.