Piss Cops

[renegades]

A friend of swims' has had a bad meth habit. For legality reasons he got himself an adderall prescription, so if he was ever involved in a incident where he would be required to take a piss test or blood test, he could claim the positive reading was due to the adderall. Is he just pissing in the wind, or is he right, that the piss cops can't differenate whether a person was on adderall or meth, just that they found amphetamines in his system.