At a Glance
Why Get Tested?
To help diagnose or rule out a phaeochromocytoma
When to Get Tested?
When you have persistent or episodic high blood pressure and symptoms such as headaches, rapid heart rate, and sweating
A blood sample taken from a vein in your arm
Test Preparation Needed?
Preparation for the test is important for accurate results. You should discontinue adrenaline (epinephrine) and adrenaline-like drugs for at least one week before the test, stop using paracetamol (acetaminophen) 48 hours beforehand, and fast for 8-10 hours prior to collection. It is especially important not to have any caffeine-containing food (e.g. chocolate) or drinks (e.g. energy drinks like Red Bull, Coca-Cola, coffee and tea (including decaffeinated). Tobacco (smoking cigarettes or cigars) and alcohol must also be avoided for at least 4 hours before specimen collection. Talk to your doctor about any medications you are taking, since several different drugs may interfere with the test.