Abstract
Ayahausca is an ethnobotanical drink of South America and the compound dimethyltryptamine (DMT) is primarily responsible for the hallucinogenic effects. DMT has a short half-life and its detection in urinary drug screens is challenging. We investigate a simple alternate approach to detect ayahuasca consumption by relying on other constituents of the drink, the β-carboline harmala alkaloids. Three commercially sourced harmala alkaloids were characterized and added to a non-targeted high-resolution mass spectrometry urine drug screening method. All analyses were performed on a Waters Xevo G2-XS LC-QTof, in positive electrospray ionization mode. The mass detector was operated in MSE mode and data processed with UNIFI™ software. A urine specimen from a patient suspected to have consumed ayahuasca was analyzed by a non-targeted drug screen. The harmala alkaloids: harmine, harmaline and tetrohydroharmaline (THH) were characterized and their detection data added to the toxicology screening library. Harmaline and THH were detected in the patient's urine specimen. The inclusion of the harmala alkaloids into the drug screen method library may enable the detection of ayahuasca use in patients that undergo non-targeted drug screen.
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