What happens if I fail a pre-employment drug screening in Idaho?
For around $15 you can buy an at home drug screen for THC at Walgreen’s or any large Drug store or pharmacy. These drug tests are every bit as reliable as the ones done in the laboratory. They have the same cut-off levels for a positive test result which is 50ng/ml. The only test that is more accurate is the gas- chromatography/ mass spectrometer test that can detect any amount of a drug in your system. This test is only done when a preliminary test result shows a positive. This as done because the GC/MS test is virtually infallible and will allow them to record the actual levels of a drug in your system. As was mentioned by another poster, the 30 day rule is not accurate. THC is stored in fat cells, so people who use marijuana very frequently do not process it out of their systems quickly and it ends up building up in fat cells. For a single use, or a less frequent user it would be highly unlikely that their body would store significant enough amounts of THC in the system to show up a
