What Leary said is true... It depends on your metabolism, but if you don't have a lot of body fat and stay active, drink lots of fluids, it will probably only stay in your system for 3-4 days afterwards. Be careful though! Your first pee in the morning (you know, when it is really dark), will almost guaranteed test positive for much longer. Try to take the test later in the day and drink lots of water and fluids throughout...