Drug Test False Positive. today i took a pre-employment urine test for a new job, and they had an employee call me and tell me i failed. i knew the guy but they still couldnt tell me themselves and every time i try to ask them what the problem was they stated that they did not know what i failed for and that i just failed and that was it. i dont use drugs , i dont even take asprin. ill take 2 tylenol allergy tablets here n there b/c the pollen is very high where i live and im sure that they wont make you fail a test. im wondering if this is something that i should take legal action for becouse it seems to me that they should be able to tell me why i failed and what for. as far as i know you have to take drugs to fail a drug test so i have no clue why there has been a complication.