Catecholamines test
Quick answer: This test measures catecholamines such as adrenaline and noradrenaline in blood or a 24-hour urine collection. Doctors order it to look for rare adrenal or nerve tumours such as phaeochromocytoma, especially with episodes of high blood pressure, headache and sweating.
- SampleBlood or 24-hour urine
- TakesAbout 30 minutes for blood with rest; 24 hours for urine
- Before the testSome foods, caffeine, smoking, stress and medicines can affect the result, so follow your doctor's instructions and tell them what you take.
How the test is done
- 1Your doctor tells you which foods, drinks and medicines to avoid beforehand
- 2For blood, you lie down and rest for about 20 to 30 minutes first
- 3Blood is drawn, or you collect all urine for 24 hours
- 4The sample is kept cold and sent to the lab
What your results can mean
Reading your report
Normal ranges differ between labs and by age and sex, so discuss your result with your doctor.
If the result is outside the usual range
A high level can be seen with phaeochromocytoma or paraganglioma, rare tumours that release these hormones. Stress, caffeine, smoking, some foods and medicines can also raise levels.
Who usually has this test
People with episodes of high blood pressure, pounding headaches, sweating and fast heartbeat, or a family history of these tumours.
Risks and aftercare
There are no special risks; a blood sample may leave a small bruise.
Names and options
Also called: adrenaline noradrenaline test, catecholamines
Options
- Blood (plasma)
- 24-hour urine
Listed by the hospital as
- CATECHOLAMINES, PLASMA
- CATECHOLAMINES 24 HRS URINE
Questions about this test
Why do I need to rest before a blood catecholamine test?
Standing, stress and activity raise catecholamines. Lying quietly first helps show your resting level.
What should I avoid before a catecholamine test?
Coffee, tea, smoking, bananas, chocolate and vanilla are commonly listed, along with some medicines. Follow your doctor's list and do not stop medicines without advice.
Is a blood or urine test better?
Both are used. Many doctors now prefer tests for metanephrines, which are breakdown products, and your doctor will choose what suits you.
Related tests
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.