the list would be too extensive to post so my advise to you is not to take any over-the-counter medications if you are having a blood test unless they are essential to your health and well-being. i do not know what you are taking and why nor do i know what type of drug screening test you are getting. if you do take or have recently used illegal drugs i can tell you that tests are becoming more and more sophisticated all of the time.
what over the counter drugs interfere with drug tests?