Creatine can actually help you PASS a drug test!
The only real way to pass a urine drug test is to dilute your urine. However, they have tricks to detect whether you have done this.
1st they look at color... If you've diluted your urine it will most likely be as clear as water. The solution: Take B-Vitamins before the test! This will make your urine yellow, no matter how much you dilute it.
2nd, if they suspect that you've diluted your urine, they test for Creatinine Levels which is a byproduct of creatine. You naturally have a small amount of this in your urine. However, if you dilute your urine, there won't be any. So dissolve creatine in the massive amounts of water you'll be drinking to dilute your urine, and the 2nd problem is solved.