Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS); Enzymatic Colorimetric Assay
1-Methylhistamine; Histamine Metabolites; Urinary N-Methylhistamine
Urine, Timed Collection
Mayo Medical Lab
Other Reference Test
Monday and Wednesday
3-5 mL 24 Hour Urine
24-Hour Urine Container
No preservative. Patient must not be taking monoamine oxidase inhibitors (MAOIs) or aminoguanidine as these medications increase N-methylhistamine (NMH) levels.
Room Temp=14 Days; Refrigerated=28 Days (Preferred); Frozen=28 Days
5 mL 24 Hour Urine
3 mL 24 Hour Urine
Total Volume required for timed urine collections. Order in Mayolink and send with Mayo courier Monday-Friday.