It identifies the newest drugs hitting the streets, and has contributed to three drugs being added to the federal government's list of illegal substances. (nystateofpolitics.com)
This would appear to be the case, as athletes who use legal substances to improve their performance also tend to use illegal substances as well. (sciencedaily.com)
You are tested once a year for illegal substances unless you are already in the drug program. (sbnation.com)