Thank You N2!!! I just found out I passed a pre-employment urine test, thanks to N2's dilution advice. I would urge anyone who plans on using this method to do at least one full practice run in the days preceeding the test, complete with a home drug test kit (the marijuana ones cost $15 at CVS). This will help you determine how long your body takes to begin producing clean pee, and also will give you peace of mind (because we all know how paranoid a drug test can make a productive and otherwise law-abiding citizen). I even went so far as to keep a log of how much I drank, what vitamins I took, and how many times I peed, and the time at which each occurred. I was a heavy smoker (at least 3 bowls a day) for over a year and a half, and stopped for 4 days before I went in for the test. Good luck to any and all of you who are subjected to this awful procedure, and feel free to email me if you have specific questions.