I got drug tested once when I was 19. This was when I smoked pot casually ... . Anyway, I went to GNC and bought this ship that made me not test positive — and it worked. I forget what it was called, but basically, you mixed it in with a gallon jug of water and you drink it.
When I got to the clinic to do the test, I was in the waiting room (waiting of course) and I had to pee so forking bad I thought my urethra was going to explode.
To make a long story short, I pashed, however, if you're getting randomly tested, this is absolutely zero help.