Age specific reference ranges provided with report.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Medications that may interfere with catecholamines and metabolites include amphetamines and ampehtamine-like compounds, appetite suppressants, bromocriptine, buspirone, caffeine, carbidopa-levopa (Sinemet), clonidine, dexamethasone, diuretics, ethanol, isoproterenol, methyldopa (Aldomet), MAO inhibitors, nicotine, nose drops, propafenone (Rythmol), reserpine, theophylline, tricyclic antidepressants, and vasodilators.
Days Test Performed
Monday - Saturday
3 - 6 days
Soft Order Code
Catecholamines, fractionated, urine, 24 hour
Catecholamine Fractionation, Urine
Catecholamines, Free, Urine
Catecholamines, Unconjugated, Urine
Looking to Order a Test?
We’ve provided helpful links to make ordering easy.
All specimens should be accompanied by a requisition.
Learn about how to properly label and where to ship specimens.
MLabs provides all the supplies necessary for the collection of specimens.
Visit our provider FAQ and learn about common questions to ordering tests.
Offsite Collection Instructions
Collect 24 hour urine specimen. Add 25 mL of 50% acetic acid to container prior to start of collection to maintain pH between 2 and 4 and refrigerate specimen during collection. Mix well, measure 24 hour urine volume, aliquot urine into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form.
Use 15 mL of 50% acetic acid for children less than 5 years old.
2 mL aliquot of 24 hour urine collection
1.5 mL aliquot of 24 hour urine collection
Test includes epinephrine, norepinephrine, and dopamine. Test sent to Mayo Clinic Laboratories.