Substances to Avoid
Keep in mind that some over the counter vitamins, supplements, and medications could cause a false positive in a drug test. For example, ibuprofen like Nuprin or Advil might trigger a false positive for marijuana. However, this is not a problem anymore thanks to recent progress in testing. Some other substances would also result in similar “side effects”. Indeed, many OTC work-out supplements are even banned from professional competition. Therefore, if you are an athlete, make sure to know these substances and avoid them during training. It is better to discuss with your trainer, coach, or doctor before deciding to take them. [2]
