Well, there have been more than a few times when both of us had smoked the night before a surprise test, and always passed. The fact that I have to take a diuretic for my bp might have had something to do with it too.

MY friend said that one time after taking the pill his urine turned neon yellow for a while..what would cause that?

And if it doesn't work, and I have been tested a number of times and came out clean always, what would be the reason? Would I just be genetically predisposed to not come up positive or something?