listen joe, why not just abstain for the two weeks. no pill or method is one hundred percent bound to work, otherwise piss tests would be discontinued because they would be fooled every time. also think about the consequences if your plan doesnt work and you flunk it. whenever im in a situation and i need to keep clean, i just use something that wont be tested for. and example could be dxm, or alcohol. they may also test you piss not only for weed, but for other illegal drugs too. depends on the kind of test. you can also use someone elses urine, but this wont work if they watch you pee. and remember, many urine tests are not one hundred percent foolproof, so incase you decide to try to cheat it, you may have an approximated 10 to 15 percent to pass it if your pill or additive wont work. as i see it you choices are to either abstain, or go by luck and method., think about it man, after you pass the test you can take all those blunts you saved and party in celebration of your willpower and the fact that you dont have to worry about the consequences of coming out dirty.