i am tested every month for a prescription, and i don't use anything that could possibly come up as a benzo. however, last month my test was positive. i'm wondering what could possibly cause a false positive? it's hard to convince a doctor you didn't use when they have a test saying otherwise. the only things i take are anti-depressants and birth control. i take ambien about 10 days a month, but hadn't taken any within about 5 days of the test.