). When she gave me a UA she said I had failed it for methamphetamine (there was a very faint line on the instant test, which means she should’ve counted that a negative for meth result. I have been sober from methamphetamine for more than a year. I would admit if I relapsed, especially since I already knew I was going to get violated for the DUI. She said she sent in my UA and 3 days later got the results back and they were positive (I have not seen the “results”). Is there somewhere I can find scientific proof that these drug tests, especially the instant panel tests, are not fool proof? Especially since I am prescribed non-time release Adderall, Wellbutrin, and gabapentin. That there is also plenty of other things that can interfere/mess with these tests? Can you please recommend any text books, websites, and/or science journals that would help me prove this?