Hydroxyindole acetic acid (5-HIAA)
Description: Values above 10 mg/24-hours occur in carcinoid syndrome. Slight elevations also occur in nontropical sprue and after reserpine .Drugs which can interfere with testing due to physiologic response: Acetaminophen, alpha and beta blockers, atenolol, bromocriptine, broncholdilators, clonidine, digoxin, isoniazid, L-dopa, labetelol, methyldopa, monoamine oxidase inhibitors, nitroglycerin, sympathomimetic amines, phenobarbital, phenothiazines, phentolamine, reserpine, salicylates, tricyclic antidepressants.
Requirements: 10 ml
Material: 24 hr urine
Turnaround time: 14 days
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