The test could be easily carried out on standard urine samples, where the trace of the drugs is likely to linger ???for days, probably weeks,??? Thevis said.Benzothiazepines work on so-called calcium channels in cells in muscle fibers.Thevis said a typical path taken by cheats was to copy a drug, such as an anabolic steroid, and then modify it slightly so that it retained the same effect, but beca