False-negatives and false-positives from immunoassays can lead to adverse consequences for patients and providers. By identifying medications that contribute to false-negatives and false-positives, pharmacists decrease misinterpretations from urine drug screens. Side effects of plaquenil pms Alopecia plaquenil One study found morphine levels high enough to result in positive EIA testing after ingestion of 1 poppy seed muffin or 2 poppy seed bagels. 8 This type of false-positive result is much less common in testing outside of clinical situations eg, the workplace, wherein thresholds for a positive opiate screening are higher. 9 A careful history. Bentyl® - false positive for LSD, Methadone Benylin - false positive for Opioids Benzedrine® - Amphetamines Benzphetamine - false positives for Amphetamines, Ecstasy, and LSD Biphetamine® - for Amphetamines Black Pearls Tung Sheuh pills - contain benzodiazepines Briantum - may test positive for benzodiazepines Why Would A Urine Test Show Positive For Fentanyl When I've Never Taken It? I Do Take Ms Contin. I've been under contract with a Pain Management Doctor for approximately 12-14 years. Pharmacists can provide guidance in selecting appropriate drug therapies that are less likely to cause false readings, thus decreasing the need for additional testing. Unexpected results from urine immunoassays should have a confirmatory gas chromatography–mass spectrometry or a high-performance liquid chromatography test performed. Plaquenil false positive methadone Urine Drug Screening Minimizing False-Positives and False., DRUG SCREENS. Substances that may cause a false positive - A. T. Plaquenil and optic neuropathy Several of these medications for mental disorders can lead to false positive tests. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show that you have methadone in your urine. What Can Cause a False Positive Drug Test - WebMD. Why Would A Urine Test Show Positive For Fentanyl When I've Never Taken.. False Positive for Methadone -. False-positive results for methadone, opioids, phencyclidine, barbiturates, cannabinoids, and benzodiazepines were also reported in patients taking commonly used medications. The most commonly. False-positive opiate tests have reportedly been caused by dextromethorphan, diphenhydramine, quinine, quinolones, rifampin, verapamil, and poppy seeds.4 In the hopes of testing for medical adherence, some urine drug screens specifically include methadone. Of note, false positive methadone screens have been reported to be caused by quetiapine. Used to treat ADHD, Ritalin is a well-known cause of false positive tests for amphetamine, methamphetamine, and LSD. 12 Doxylamine. Doxylamine, found in Unisom and other over-the-counter sleep aids, may cause a false positive on drug tests for methadone, opiates, or PCP. 13 Sertraline Zoloft Sertraline is an antidepressant. Taking.