I passed my home drug tests for three days after not smoking for 23 days -- the forth day, after taking a prescribed Xanax the night before, I then failed twice today. Does this make sense? I thought once negative, always negative. Does Xanax cause a false positive or is it common for my test to turn around and go back to negative? I haven't changed anything else so I have to attribute the failure to the Xanax. Am I making the wrong assumption?
SmokeyDude Reviewed by SmokeyDude on . Passed home test 3 days and 4th day failed? I passed my home drug tests for three days after not smoking for 23 days -- the forth day, after taking a prescribed Xanax the night before, I then failed twice today. Does this make sense? I thought once negative, always negative. Does Xanax cause a false positive or is it common for my test to turn around and go back to negative? I haven't changed anything else so I have to attribute the failure to the Xanax. Am I making the wrong assumption?:(:(:( Rating: 5