11. In 2011, he was provisionally suspended after testing positive for a potential drug masking agent . 12. During the night they've obviously given these to the kids as a masking agent ." 13. If it finds no banned drugs or masking agents , the B sample is thrown away. 14. As such, epitestosterone is banned by many sporting authorities as a masking agent for testosterone. 15. Diuretics are banned because they can be used as masking agents to avoid detection of steroids. 16. In 2006 Castillo was found guilty of using furosemide, a banned diuretic and so-called masking agent . 17. But the IRB outlaws probenecid because it can be used as a masking agent for steroids. 18. The labs associated with the NFL have also done a lot of work on masking agents . 19. Five positive tests for the stimulant and masking agent bromantan were overturned by an arbitration court. 20. Diuretics are considered masking agents for performance-enhancing drugs.
