Well, i may be able to help you with this. I took a single dose of Xanax (0.50 MG) 3 weeks ago then about 2 weeks later i took another single dose of Xanax (0.50 MG) 178 hours ago (7 days, 10 hours) and purchased a 12 panel home drug test kit at wal-mart for $35 (
First Check Home Drug Tests - the most advanced home drug and health tests. Home Drug Test Information. - Inverness Medical for more information) then piss tested myself (178 hours have passed since my last dose of xanax & 168 hours have passed since my last dose of Oxycodone (15 MG) ) and passed the test (without dilution)
Cut off levels are 100 ng/l for Oxycodone & 300 ng/l for Benzos.