All of the simple drug tests are intended for use as screening tools, with positive results sent to labs for verification.

> Even colorimetric test makers say their products only screen for the possibility of illegal drugs – and should not be considered tools for verification.

> “NOTE: ALL TEST RESULTS MUST BE CONFIRMED BY AN APPROVED ANALYTICAL LABORATORY!” reads one warning for a pack of colorimetric tests.

They should have known this and followed proper procedure.

Also keep this in mind for your employment drug screening. This will typically use more advanced tests for the first pass, but if someone comes up positive then they should automatically send it to the more advanced and accurate screening step. The good testing companies do this automatically but I’ve heard stories where some cheap testing companies did not do this and falsely accused employees didn’t know to request the accurate screening step.