I took a random urine drug test at work recently. I take lexapro, lamictal, and colonipan for anxiety and bi-polar 2 disorder, and often take ibuprofen for headaches, which i guess are a side-effect from one of these medications. I am worried about a false negative on this test, and worried about the same result on a retest. Are my worries reasonable, or am i being paranoid? I have received many mixed messages about this question and am trying to get a straight, reliable answer. Any and all information about this wil be greatly appreciated.