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Doctor insights on: False Positive For Meth

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What should I do about potential false positive for meth?

What should I do about potential false positive for meth?

Don't understand ?: Amphetamine false positives on screening tests are highly common, and if such a test is used for "forensic" purposes - i.e., there are legal consequences to a positive test - a confirmatory test should be used that will tell a false from true positive. If you are on decongestants of any kind, false + results are common, and other drugs may cause them as well. You can insist on confirmatory tests. ...Read more

Dr. Alvin Lin Dr. Lin
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Will acetaminophen show up positive for anything on a urine test. And if so what will it show up as? Also can hydrocodone cause a false-positive for meth on a urine test? I've heard there's a lot of things that can do that.

Dr. Alvin Lin Dr. Lin
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Urine toxicology: Employers don't usually care if you take acetaminophen or paracetamol. Hydrocodone is an opioid, related to oxycodone, morphine, etc while meth is in amphetamine class, so they won't cross react. However, many common consumer items can cause false-positives so do be careful. Check out http://goo.gl/LeazzK & http://www.medscape.com/viewarticle/726897 for list of common causes of false positive test ...Read more

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What are some medicine that might come out positive as meth on a drug test medicine i take prometh/codeine, prednisone, advair, hydroxzine. False positive for meth

What are some medicine that might come out positive as meth on a drug test medicine i take prometh/codeine, prednisone, advair, hydroxzine. False positive for meth

None of the above: There are many false positives for all amphetamines, but not specifically methamphetamine. Proper drug testing goes beyond the screening test - if that is positive definitive testing should be done, which will eliminate essentially all false positives. Every cold medication around can give a positive amphetamine, but not a positive for methamphetamine. You need to demand the definitive test. ...Read more

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What would cause a false positive for methamphetamine on a drug screen?

What would cause a false positive for methamphetamine on a drug screen?

Nothing: I am unaware of anything. There are reports showingfalse positives are seen with: ephedrine, (ephedrine sulfate) pseudoephedrine, (ephedrine sulfate) propylephedrine, (ephedrine sulfate) phenylephrine, or desoxyephedrine. In my experience these are not issues. ...Read more

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What happens if your pee test shows false positive for methamphetamine and your on antidepressants serolquel and effexor (venlafaxine)?

What happens if your pee test shows false positive for methamphetamine and your on antidepressants serolquel and effexor (venlafaxine)?

It is up to your MD: You are correct that both Effexor (venlafaxine) and Seroquel (quetiapine) can result in false positive results for methamphetamine. What happens after that usually requires a conversation between your tester and yourself. ...Read more