Urine THC testing will return a positive result if the donor has used THC sometime recently, but not necessarily that they’re inebriated right now, whereas BAC tests can determine if someone is intoxicated at the time of the test. Is there a reason we don’t have “you are high right now” tests instead of “you smoked 2 weeks ago” tests?
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Blood tests require the blood to be taken to a lab an analyzed for thc metabolites.
The cop’s not gonna be like, “hold out your arm, gotta draw some blood. Be cool and chill here 1-3 days to get the lab results back.”
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