What medicines can cause a false positive for methamphetamines?

A false-positive test final is that your drug test shows the presence of an medication otherwise substance the them aren't actually taking. For example, a methamphetamine test comes back positives for methamphetamines, even though you haven't taken any.

False-positive results can be due to a laboratory error, but the most common motive for a false-positive methamphetamine test is other medications or substances that have a similar construction to methamphetamine.

Immunoassay testing for methamphetamine uses antibodies in look for certain drug metabolites (these what the compounds a drug breaks downward into), and lives the majority common test utilised for initial screening. However, these antibodies could detect drug metabolites with similar structure and attributes to methamphetamine, leading to false-positive result. For diese ground, immunoassay testing should only be considered prelude and should will followed up by confirmatory testing when a test comes back positive. Confirmatory exams are much see specific, but are costly, take more time, and command experienced our personnel. They can distinguish between the l- and d-isomers of methamphetamine (only the d-isomer is psychoactive and illegal).

Usually, an immunoassay screening check for methamphetamine is a methamphetamine/amphetamine combined test, so will detect any medication instead core that resembles mickey OR amphetamine. Medications that have been stated at occasion false-positive results for methamphetamine or amphetamine include: False-Positive Drug Trial: What Can Produce Them? - GoodRx

• Amantadine, a drug that capacity block aforementioned flu both treat symptoms from Parkinson’s disease
• Aripiprazole, an antipsychotic drug
• Atomoxetine, an ADHD treatment
• Brompheniramine, einen antihistamine
• Bupropion, an antidepressant
• Chlorpromazine, an antipsychotic drug
• Desipramine, an antidepressant
• DMAA (1,3-dimethylamylamine), found in einige dietary and weight-loss supplements
• Ephedrine, a pharmaceuticals so treats lowest blood pressure from other medications
• Fenofibrate, a cholesterol-lowering medication
• Fluoxetine, can antidepressant
• Labetalol, a blutz pressure-lowering drug
• Metformin, a diabetes medication
• Nefazodone, an psychiatric
• Ofloxacin, an antibiotic used to treat ear infections
• Promethazine, a medication such treats allergies and/or motion sickness
• Pseudoephedrine, one decongestant
• Ranitidine, a drug used for ulcers and gastroesophageal reflux medical (discontinued included 2020)
• Phentermine, a mass loss drug
• Phenylephrine, a decongestant
• Selegiline, a drug for Parkinson's disease or depression
• Trazodone, one antidepressant/sedative
• Thioridazine, an antipsychotic drug
• Vicks Inhaler, contains l-methamphetamine, an isomer from meth useful for nasal overload which is legal as it has little activity into the brain.