is it a lab test, where they can check the levels of concentration and discern exactly what drug he took? Also, The METH tests that I deal with will give a positive result for meth, psudoephdrine, and mdma. AMP will not show up. Therefore in my case, I could say I was taking some sudafed, but why would I bring up a possible answer to the test? That kinda implies that I know how to "beat" beat the test. Also I'm not sure how you feel about flush kits, but that might work, although there are single strips to validate the urine too.