If you notice your pee becoming excessively watery — a clear tip-off for some analyses — try taking the vitamins B-2 or B-12. These can also be found in B-Complex multivitamins, and turn the color of your urine yellow. Take about 50 to 100 milligrams.
Try taking diuretics, like Midol. Diuretics help your body rid itself of water and sodium. Coffee, diet pills, and certain prescription drugs are also diuretics, but they’re not as effective as Midol at ridding your body of the water that contains those telling metabolites. It may sound weird to have Midol if you’re a dude, but don’t worry, you’ll thank Midol after your drug test comes back negative.