Tryptamine, N,N-Dimethyltryptamine, N,N-Dimethyl-5-hydroxytryptamine and 5-Methoxytryptamine in Human Blood and Urine

Abstract

TRYPTAMINE is a normal constituent of human urine^1–5; about 30–120 µg of the amine are excreted per 24 h. In blood, tryptamine has hitherto been demonstrated only qualitatively and under pathological conditions in a carcinoid patient⁶. There is no information about an occurrence of N,N-dimethyltryptamine in human beings. N,N-dimethyl-5-hydroxytryptamine (= Bufotenin) was demonstrated qualitatively as a constituent of normal human urine^4,7; in children an excretion of 0–0.03 µg amine/100 mg creatinine has been found with, at most, semi-quantitative methods⁴. Apparently, N,N-dimethyl-5-hydroxytryptamine was still not demonstrated in blood. 5-Methoxytryptamine has been found in the urine of patients with rheumatic fever⁸, and that in an order of magnitude of 30–210 µg/24 h.