So my friend swears by these things, he's passed 5 drug tests just by taking loads of them and drinking energy drinks like Red bull the day before. He is a moderate smoker, and smoked within a few days of a test before and passed. In theory, water purification pills would work, because they just dilute your piss with pure water and break down the THC fat cells in your bladder. But then again... any testing place should notice the enourmous amount of pure water in your piss... Anyone know exactly if water purification pills work?