It may seem that it is pretty easy to prepare for an instant drug test, especially when you know exactly when it is going to happen. With a plethora of urine cleansers, permanent detox products, and other aids, it seems that a failed drug test results would happen on a pretty rare occasion. You may be surprised to find out that is not the case. As sad as it may appear, but false positive test results occur less frequently than the true positive readings. In some cases the toxin level in a sample is so high that there is not a chance that the results could be disputed. When the results are interpreted as a false positive drug screening, the amount of the toxin (whichever one shows up) is usually right on the border of the cut-off line. A confirmatory GC/MS test (gas chromatography – mass spectrometry) usually determines for sure whether it is a true negative result. The most common mistake that people do not realize, is that detox pills that work in the matter of hours can only decrease the toxin level to a certain degree; so, the less toxins are in the body initially, the easier it is for the detox product to work. Any fast cleansing formula can work best on the pre-cleansed system. It is taken for granted that not everyone has the time or means of getting a full body detox, but abstaining for a few days before the test will reduce the toxin level in the body as well! To get good results, make sure to start preparing in advance.