You need to provide more information in your question.
They can return false readings but don't count on it. They can and will re-test.
No. Not even close.
they drug test once when you interview right after the interview but you dont do it at the building, they send you somewhere else with half an hour to return.
If you are taking a drug test for a job and it is positive, you will not be able to retake the drug test. However, you can always ask the person giving the drug test of it can be retaken.
The consequences of failing a non DOT drug test will depend entirely on your employer's drug policies. Some employers will terminate your employment contract, while others may give you time off without pay for a couple of days with another drug test upon your return.
Will you pass a swab drug test if you passed a urine drug test on the same day?
It depends on the jurisdiction that one is in of course. Talk to your PO for specifics. If you don't report for a drug test, you may get a warning, have to return to court, or go to jail most likely.
Methocarbam drug test
Drug test
The screen threshold is the amount, usually milligrams per deciliter (mg/dL) of sample, that must be present in a specific lab specimen for the test to return a positive. Usually the screen threshold for a drug test is high, meaning drugs or drug metabolites must be present in great amount for the test to return positive. The result is that many drug tests come back negative although the sample does in fact contain drugs or drug metabolites. Any positive specimen is then analyzed by lab machine which detects almost any trace amount of drugs or drug metabolites.
It's not a drug that drug tests typically check for.
cocaine will come up as cocaine on a drug test and vyvanse will come up as an amphetamine on a drug test