The diuretics promote the excretion of urine and drinking lots fluids dilutes the drug in the urine, but neither causes the drug to leave the body faster. Also, testing procedures have been establish that can catch this type of manipulation. The use of steroids, which are a synthetic versions of the human hormone testosterone, is, of course, banned by most sports-governing bodies. This is because the practice can cause physical problems ranging from acne to undesirable sexual changes to liver and coronary artery disease. And it can result in serious psychological disorders as well.
Users see bigger muscles, but they are blind to the intricacies of their internal systems.
Therefore, they don't believe the stuff is causing harm until they are faced with a serious health problem.