There are many things that people do to successfully pass a drug test. In some cases staying free of toxins and getting your system cleansed it just not an option, so some people prefer other methods. One of those methods is diluting a urine sample with water. Some believe that drinking water by the gallon or adding water or other liquids to the urine sample will aid in getting a negative drug test result. Here are a few reasons why this does not work. During every urine drug testing each sample is pre-screened to confirm that the sample it really a human urine by measuring certain characteristics, such as temperature, creatinine level, specific gravity, pH level, and so on. Normally, creatinine is excreted from a human body at a constant rate, so it is always present in the urine. When you consume unnaturally large amounts of fluids, e.g. water, the urine becomes diluted and, subsequently, creatinine levels drop. On the other hand, when a human body is dehydrated, creatinine level in the urine may go up. Abnormal reading during a urine drug test will cause suspicion and be sent for a further testing. Adding fluids to the urine sample will also cause creatinine levels and specific gravity reading to be off the charts. The best way to make sure you successfully pass a drug test is to use specialized detox product – this will ensure that your urine has all normal characteristics, and also tests negative for the presence of illicit toxins.