False-positive immunochemical screen for methadone attributable to metabolites of verapamil.
Lichtenwalner
M R
MR
DrugScan, Inc., Warminster, PA 18974, USA.
Mencken
T
T
Tully
R
R
Petosa
M
M
D002121:Calcium Channel Blockers / Q000652:urine*; D002851:Chromatography, High Pressure Liquid; D003429:Cross Reactions; D005189:False Positive Reactions; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007124:Immunoenzyme Techniques; D008691:Methadone / Q000652:urine*; D009294:Narcotics / Q000652:urine*; D011933:Reagent Kits, Diagnostic; D015813:Substance Abuse Detection / Q000379:methods*; D014700:Verapamil / Q000652:urine*
D002121:Calcium Channel Blockers; D009294:Narcotics; D011933:Reagent Kits, Diagnostic; D014700:Verapamil; D008691:Methadone