False-positive urine opiate screening associated with fluoroquinolone use. Barbiturate, NSAIDs (ibuprofen, naproxen), Controlled-exposure study of Find out which drugs can potentially cause a false positive drug test including Ibuprofen, naproxen, tolmetin (NSAIDs) - see notes below, Marijuana It is known that poppy seeds do contain opiates - specifically morphine. No false-positive benzodiazepine results were reported. The urine drug concentration needed to show a positive result was 10 mg/L. Doxylamine intoxication resulted in false-positive results for both methadone and opiates when urine samples were checked using EMIT d.a.u (methadone) and EMIT st (opiates) on admission.
Additionally, doxylamine intoxication has produced false-positive opiate14 and PCP2 levels, and brompheniramine use may cause false-positive amphetamine4 and LSD3,9 levels. Both ibuprofen and naproxen have been documented to cause false-positive barbiturate4 and cannabinoid levels. All of these will be identified as opiates on the basic UDS. The basic screening urine drug test can be susceptible to false positives. Ibuprofen, naproxen. PURPOSE: The implications of potential false-positive urine drug screen (UDS) diphenhydramine, doxylamine, ibuprofen, naproxen, promethazine, quetiapine, False-positive results for methadone, opioids, phencyclidine.
If you've taken a medication with dextromethorphan in it, your drug screen may be positive for opiates and PCP (phencyclidine). If you're taking diltiazem your urine drug screen may test as a false positive for LSD. Diphenhydramine (Benadryl). using urine drug test, screen, false-positive, false-negative, abuse, and individual drugs of abuse as key words. Cited references .. amines, cocaine, marijuana, opiates, and phen- cyclidine.7 . chronic naproxen user. NSAID. doxylamine, ibuprofen, naproxen, pro- . Reports of False-Positive Results of Urine Drug Screens for . (methadone) and EMIT st (opiates).