no
She would most likely test positive for methamphetamine and amphetamine. One of the breakdown products of methamphetamine is regular amphetamine, so a positive result for methamphetamine is basically needed to discriminate a positive amphetamine as due to ingestion of meth vs ingestion of amphetamine. So basically, your sister's test should be positive for methamphetamine also if she did crystal meth.
I'm guessing no
No, Allegra allergy medication should not cause a positive result for methamphetamine in a drug test. Allegra contains fexofenadine, which is an antihistamine and does not typically cross-react with drug tests for methamphetamine.
dosoxyn and yvanse will both show positive in the drug test for methamphetamine
No, it is a glucocorticoid steroidal antiinflammatory medication that should not test positive for methamphetamine, nor should it metabolize to any substances that yield a false positive for methamphetamine.
Uh, having methamphetamine in your system! But other sources say the following can also cause false positive results: Desoxyephedrine, Desoxyn, Methedrine, Vicks Inhaler (non-prescription drug), Selegiline, Benzphetamine and Famprofazon, Dexedrine, Benzedrine, Adderal.
sudafed can give u a false positive for meth be careful
You sure will. Make sure you bring your prescription to the test to prove to them that it is legit.
Sudogest, which contains pseudoephedrine, is not chemically related to barbiturates and typically would not cause a positive test result for barbiturates. However, some drug tests might have cross-reactivity or false positives due to the specific testing methods used. It's always best to inform the testing facility about any medications taken prior to a drug test. If there's any concern, retesting or using a more specific test can help clarify results.
it could be from something you ate; particularly poppy seeds
A blood panel is used. If a newborn baby tested positive for methamphetamine, there was exposure to meth in utero.