Hello,
False-positive results for amphetamine and
methamphetamine were the most commonly reported.
The most commonly used tests to screen urine for drugs of abuse are immunoassays, even though false-positive results for drugs of abuse have been reported with a number of these rapid-screening products.
Results from such tests should be confirmed using additional analytical methods, including gas chromatography–mass spectrometry.
Following drugs can results in false positive test for Methamphetamine:
ephedrine, pseudoephedrine, desoxyephedrine, propylephedrine and phenylephrine.
Dexedrine (
Dextroamphetamine), Ritalin (
Methylphenidate) and Adderall (made of four different amphetamine compounds)
ills containing
phenylpropanolamine such as Accutrim or Dexatrim
Even
kidney infection, kidney disease, liver disease and diabetes could all cause a false-positive for methamphetamine.
Thus it is possible to have a false positive for your tests.
Please confirm with some analytical methods like Gas- Chromatography.
Hope this helps.
please write back for further queries.
Wishing you good health.