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. Chloroquine phosphate and invertebrates Does hydroxychloroquine cause discoloration of palms of hands Chloroquine phosphate freshwater What Can Cause A False Positive For Methadone? What Can Cause A False Positive For Methadone? There has always been much disagreement between drug test manufacturers, companies providing drug tests and the public that must take drug tests as to the validity of false positive drug tests for Methadone, which is an Amphetamine. Hydroxychloroquine - I believe this drug causes false positive drug test of THC? Asked by Boni6258 Updated 6 January 2018 Topics chloroquine, hydroxychloroquine, drug test, medication False-positive results for methadone, opioids, phencyclidine, barbiturates, cannabinoids, and benzodiazepines were also reported in patients taking commonly used medications. The most commonly. 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 Commonly prescribed medications and potential false., Hydroxychloroquine - I believe this drug causes false. Plaquenil drug wikiPlaquenil lupus nephritisWhat are the ingredients in plaquenilDoxycycline and plaquenil togetherIs ecuador a chloroquine resistant area So how can two urine tests in a row come back positive for Methadone when I haven't taken any? Currently I am on Lisinoprilfor high blood pressure, Tramadol, Soma, Ibuprofen, Lortab 7.5 and Elaveljust at bed time to help me sleep. This combination of drugs has never triggered a false positive before. False Positive for Methadone -. Prescribed Medications and Potential False-Positive Urine.. Toxicologic Testing for Opiates Understanding False-Positive.. Some false-positive results for methadone have already been reported with other techniques and were attributable to metabolites of verapamil, diphenhydramine, or doxylamine. In our patients, these compounds are not an issue of concern. 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 Sertraline could lead to a positive result for benzodiazepines or LSD on a drug test. 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.