HISTAMINE, 24-HOUR URINE
Histamine is a mediator of allergic response. Histamine release causes itching, flushing, hives, vomiting, syncope and even shock. Some patients with gastric carcinoids may exhibit high levels of histamine.
Pre-test Information:Avoid direct sunlight, antihistamines, oral corticosteroids and H2 receptor blockers, 24 hours prior to specimen collection.
Report Delivery:Sample by 7th of the month; Report after 2–3 weeks