5. Carvedilol
We are continuing our list of drugs that contain Phencyclidine (PCP) and may cause false positive on a drug test with this beta blocker that is commonly used to treat high blood pressure, heart failure, and can reduce the risk of death after a heart attack. If you are regularly taking the prescription Coreg for your heart troubles, it is possible that the drug can provoke a false positive. However, not only is it unlikely, but if you are at an age where you have issues with your heart, you won’t be finding many reasons to take drug tests that you could potentially fail, now would you?