Quote Originally Posted by usedchemicals
you should pass, depending how much you smoked yesterday.

it should be out of your system within 3 days, but just to make sure, you should excercise and drink lots of water.
3 days is cutting it a little close. I could easily see it taking 5 days or more to clear their system before the test negative. Every body clears THC at a different rate and you should get more info like how much they smoked, body type, metabolism, activity level. If this person smoked 3-4 grams and they are overweight, it may take longer than 3 days. Best way to tell is with a home test.