i dont want to spread false information so im gonna tell you that I read this somewhere else on the net. it may not be accurate. i heard that Ibuprofen (spelling?) used to be an excuse you could use but not sure if they're going for that anymore. I also know that you're supposed to notify your employer of any medications you may be on before the test. I guess so you cant come back and say you were taking medication which is why you tested positive.

check this site for more info on testing. they mention the UK several times, so not too sure how relevant this is for US residents

http://www.ukcia.org/culture/piss_gui.php#1

hope that helps :rasta: