Interference with testing for lysergic acid diethylamide
Clinical Chemistry April 1, 1997 Detlef Ritter, Cherise M Cortese, Linda C Edwards et al. 24 citations
A high rate of false-positive LSD results (4.2%) occurred in urine samples from psychiatric patients when using the Emit assay. These positive results could not be confirmed by two different radioimmunoassays or by gas chromatography–mass spectrometry. Adding therapeutic medications commonly prescribed to these patients to normal urine samples produced positive LSD results with the Emit assay, indicating that those drugs interfere specifically with the Emit test for LSD.