title: False-positive LSD testing in urine samples from intensive care patients.
abstract: Unexpected positive results for lysergic acid diethylamide (LSD) were found in urine samples from 12 patients in an intensive care unit in a routine screening using the CEDIA DAU assay. None of these test results could be confirmed by high-performance liquid chromatography analysis, but all samples contained the mucolytic drug ambroxol. Further studies demonstrated that ambroxol exhibits a significant cross-reactivity in the CEDIA DAU LSD assay. Therefore, positive LSD results obtained with the CEDIA DAU assay have to be critically evaluated, particularly during the cold season, when infections of the respiratory tract often result in more frequent use of mucolytic medications.
authors.affiliation: Institute of Legal Medicine, Johannes Gutenberg-University Mainz, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Röhrich
authors.forename: S
authors.initials: S
authors.lastname: Zörntlein
authors.forename: J
authors.initials: J
authors.lastname: Lotz
authors.forename: J
authors.initials: J
authors.lastname: Becker
authors.forename: T
authors.initials: T
authors.lastname: Kern
authors.forename: C
authors.initials: C
authors.lastname: Rittner
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000551:Ambroxol / Q000652:urine; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003429:Cross Reactions; D005100:Expectorants / Q000378:metabolism; D005189:False Positive Reactions; D005260:Female; D006213:Hallucinogens / Q000652:urine*; D006801:Humans; D007118:Immunoassay; D007362:Intensive Care Units; D008238:Lysergic Acid Diethylamide / Q000652:urine*; D008297:Male; D011933:Reagent Kits, Diagnostic
chemical_list: D005100:Expectorants; D006213:Hallucinogens; D011933:Reagent Kits, Diagnostic; D000551:Ambroxol; D008238:Lysergic Acid Diethylamide