N-methylhistamine in urine

Indications

• evaluation of anaphylaxis

Clinical significance

• remains elevated in urine for many hours after anaphylaxis
• reflects overall levels of released histamine

Specimen

• 24 hour urine preferred

More general terms

• urine chemistry test

More specific terms

• N-methylhistamine in 24 hour urine

Additional terms

• N-methylhistamine

Component of

• N-methylhistamine/creatinine in urine