Noradrenaline (norepinephrine) 24-hour urine test
Quick answer: This test measures noradrenaline (norepinephrine) passed in your urine over 24 hours. It may be ordered when a phaeochromocytoma or paraganglioma is suspected, for example with episodes of high blood pressure, headache and sweating.
- Sample24-hour urine
- TakesA full 24 hours of collection
- Before the testCollect all your urine for 24 hours in the container given, following the lab's instructions; tell staff about all medicines you take.
How the test is done
- 1Staff give you a large bottle that may contain acid, so handle it carefully
- 2Empty your bladder into the toilet at the start and write down the time
- 3Collect all urine for 24 hours, ending with a final urine at the same time
- 4Keep the bottle cool and bring it back as instructed
What your results can mean
Reading your report
Stress, exercise and some medicines and foods can affect results; discuss them with your doctor.
If the result is outside the usual range
A high level can point to phaeochromocytoma or paraganglioma, but can also be seen with stress, heavy exercise, some medicines and some foods. A normal level makes these tumours less likely.
Who usually has this test
People with spells of high blood pressure, sweating, headache or a racing heart.
Risks and aftercare
There are no risks to you; avoid skin contact with the preservative and do not pour it out.
Names and options
Also called: norepinephrine urine, urine catecholamines
Listed by the hospital as
- NOR EPINEPHRINE, 24 HRS URINE
Questions about this test
Do I need to avoid certain foods?
Some labs ask you to avoid caffeine, bananas, chocolate or vanilla for a day or two before. Follow the lab's own list.
What if I spill the preservative?
Wash any spill on your skin with plenty of water and tell the lab. Do not add to it or empty it, as it keeps the sample stable.
Why measure noradrenaline over 24 hours?
Noradrenaline levels rise and fall through the day. A full-day collection shows the total output, which is less affected by short spikes.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
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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.