All NCAA student-athletes are required to sign an NCAA drug-testing consent form at the start of each academic year in order to be eligible for competition and practice.
All incoming freshmen and transfer student-athletes should also know that any medication or over-the-counter supplements that they are taking must be cleared by the sports medicine staff or athletic trainer at their college or university.
If a student-athlete tests positive for an NCAA-banned substance (even if they did not know a banned substance was included in an over-the-counter supplement) they will be ruled ineligible for one calendar year after the positive test and until the athlete retests negative.
The best way for a student-athlete to prevent the possibility of this is to check with the sports medicine staff or athletic trainer at their college or university BEFORE they take anything.