I dont recomend this but I have tried it and passed. Not for the courts but for jobs. As soon as you wake u in the morning empty your bladder then you take a capful of bleach and mix it in a nice big cup of milk and drink it followed by a big cup of water. Do not take a leak until your test. Make sure your first leak after drinking this is going into that cup for the test. You may have a slight bleach odor in you nose and mouth for a couple hours but you can get rid of it by eating food as soon as you take the test. I've done this on several occasions.