I took 1 vicodin pill on Monday,will it come up on a urin test that I'm going to take tomarrow?

If they test for it, yes, it may, depending on the method of testing.

The half life of vicodin is only 3.8 hours, so its going to be borderline.

I bet you will and I think they should arrest you for bad spelling as well.
You should have thought about the consequence before you did the act.
Its called being smart.

If they test for it, yes, it may, depending on the method of testing.

The half life of vicodin is only 3.8 hours, so its going to be borderline.
Please site your source. He will not have a clean urine.

Please site your source. He will not have a clean urine.

Not really sure where I said he would have clean urine. I merely stated that the halflife is 3.8 hours (Wapedia - Wiki: Hydrocodone (http://wapedia.mobi/en/Hydrocodone)) so the drug will be effectively out of his system (5 x half life) in ~18 hours.

As a matter of fact, I said that he probably WOULD get caught.