Analysis of Cocaine and Its Metabolites in Urine after Consumption of Coca Tea by Five Subjects and Subsequent Hair Testing.

Coca tea is a popular drink in some countries of South America where it is reputed to have medicinal properties. This preparation is composed of natural cocaine (COC) alkaloids and therefore can be banned in some countries. During an anti-doping control in Peru the urine of an athlete tested positive for benzoylecgonine (BZE) ecgonine methyl ester (EME) and COC (400 180 and 0.

Interpretation of Cannabis Findings in the Hair of Very Young Children: Mission Impossible.

Background: Hair has been suggested since the middle of the 90's to be a suitable matrix to document repetitive exposure to cannabis. Because it is possible to detect Δ9-tetrahydrocannabinol (THC), cannabinol (CBN) and cannabidiol (CBD) in cannabis smoke, the identification of the metabolite, 11-nor-Δ9-tetrahydrocannabinol carboxylic acid (THC-COOH) has been considered to allow the discrimination of active use.

Objective: Although the identification of an active compound in a child's hair shows contamination of the local environment, it is a challenge to discriminate between hair incorporation after ingestion or inhalation and environmental external deposition from dust, smoke, or even contaminated surfaces by hand contact.