False Positives in Toxicology Testing – Axis Forensic Toxicology Historically, an amphetamines immunoassay uses either amphetamine or methamphetamine as a target compound, but it is very susceptible to other cross-reacting substances leading to “false positive” screening results
One Hundred False-Positive Amphetamine Specimens Characterized by . . . Some amphetamine (AMP) and ecstacy (MDMA) urine immunoassay (IA) kits are prone to false-positive results due to poor specificity of the antibody We employed two techniques, high-resolution mass spectrometry (HRMS) and an in silico structure search, to identify compounds likely to cause false-positive results Hundred false-positive IA
How Common Are False-Positives Amphetamine Drug Tests? - MedCentral For amphetamines, most incidents of false positives can be related to a drug’s structure, but case reports and retrospective reviews have associated many drugs with false positives Following a positive drug screening, the possibility of a false positive always should be considered
Urine Drug Screening: Minimizing False-Positives and False-Negatives to . . . Ranitidine has been shown to cause false-positive results for amphetamines at doses of 150 to 300 mg daily 16 On the other hand, pantoprazole has caused false cannabinoid results 1,2 Consider using other histamine blockers (e g , famotidine) or proton pump inhibitors (e g , omeprazole, esomeprazole, lansoprazole) not shown to cause false
False-Positive Amphetamines in Urine Drug Screens: A 6-Year Review Positive amphetamine results in 3 9% of in-house samples and 9 9% of referred tests for confirmatory analysis were false positive for amphetamines Of these false-positive specimens, on average, 6 8 drugs were detected by the LC–QTOF screen
Clinical Update - Aegis Sciences Corporation Please see below for a list of drugs which may cause a false positive for amphetamine on POCT 4,8-17 Drugs marked with an asterisk (*) either contain or metabolize to amphetamine, and are therefore a true positive result Because some of these are over-the-counter, the interpretation may not be easily obtained from the medical record
False-positive interferences of common urine drug screen . . . - PubMed False-positive results were described for amphetamines, opiates, benzodiazepines, cannabinoids, tricyclic antidepressants, phencyclidine, lysergic acid diethylamide and barbiturates These false-positive results support the generally accepted practice that immunoassay positive results are considered presumptive until confirmed by a second
What Medications Cause False-Positive Drug Tests? - GoodRx Multiple medications can cause false-positive drug tests Some examples include ibuprofen (Advil, Motrin), dextromethorphan (Robitussin), and certain antidepressants, including sertraline (Zoloft) If you think your urine drug test results are inaccurate, talk to a healthcare professional