It doesn't, you will get caught.  Run away to Canada.  Listen to southern rock and become a logger.  This way when you do stupid $#!t there's not as many people for you to harm.

The half life is about 36 hours, so 72-96 and you could be in the clear.  to avoid this in the future, quit using drugs.  it will only help you in the long run.  go to school get a high paying job and get high on the low dose of cocaine in all the $20 bills, … Read more

Yes and no.  it is an opiate, but it is refined.  has a short half-life, hard to detect in small doses. If you take more than 15 mg the night before, probably will be positive.