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. Taking plaquenil and breastfeeding Chloroquine itch mouse behavior Lupus medication hydroxychloroquine 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. Medications common to the inpatient setting eg, quinolone antibiotics, rifampin can also result in false-positives on opiate EIA testing. 5 In addition, there are a wide variety of common medications eg, verapamil, quetiapine, diphenhydramine, doxylamine that are known to give false-positive results on methadone-specific EIA testing. 6, 7 Poppy seeds can readily result in a positive finding in standard urine EIA testing; a product of the opium poppy, these seeds contain small amounts of. Hi, Thank you for your input, There are several drugs that can cause false positive urine test for methadone, These are phenothazines, verapamil and related drugs, barbiturates, narcotic analgesics. In your case your medicine loratab, wellbutrin, cardizem and xanax are the possible medicine that can cause your methadone urine test positive. 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 Hydroxychloroquine - I believe this drug causes false., Toxicologic Testing for Opiates Understanding False. Who chloroquine and flouroquinoloneOtezla and plaquenilDesethyl hydroxychloroquineColor dx test results in plaquenil toxicityDoes chloroquine increase or decrease cell viability False positives are a real problem at these clinics it seems. They tell me to not take any supplements such as pre-workouts. I recently had a urine sample come back positive for amphetamine. It's as caused by a herbal supplement called acacia rigidula. I couldn't have take homes until they retested. False positives Methadone - reddit. What would cause a false positive Methadone urine test?. Plaquenil Oral Uses, Side Effects, Interactions.. Drug screen false positive is reported only by a few people who take Plaquenil. We study 48,911 people who have side effects while taking Plaquenil from Food and Drug Administration FDA. Among them, 1 has Drug screen false positive. Find out below who they are, when they have Drug screen false positive and more. Doctors give trusted answers on uses, effects, side-effects, and cautions Dr. Liporace on can plaquenil show positive drug test Although Provigil is a stimulant of sorts, its chemical makeup is dissimilar to amphetamines and should not cause a false positive drug test. 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.