Before med school, I had gotten this job, and had to take a pre-employment physical and drug screen. Since I didn't have to be at the physical until 3p, I went out the night before and did a marathon drinking fest with friends. I stopped drinking around 3am, got to bed by 4am, and just barely dragged my hung over self to the clinic by 3p.
Then the NP tells me it's time for my drug and alcohol screen. Obviously I got pretty worried.
Nonetheless, I apparently passed it, because I was allowed to start working.
Don't know if that means anything, but just thought I'd mention it.