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Often steroids remain in the body for prolonged periods of time and can be detected by urine drug tests. It is possible that certain designer steroid drugs may escape detection because they are built to be less detectable. However, the World Anti-Doping Agency works with many laboratories to develop tests to improve detection of performance-enhancing drugs in the body.
Sometimes the steroid itself is not found but drugs that are used as masking agents are. Bumetanide and furosemide are diuretics, or water pills, that may cause a false-negative test. For professional and elite athletes, the presence of these masking drugs in a urine sample is also considered a failed test (http://www.wada-ama.org/en/World-Anti-Doping-Program/Sports-and-Anti-Doping-Organizations/International-Standards/Prohibited-List/).
Medically Reviewed by a Doctor on 7/29/2014
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