Have severe arachnoiditis last five years Take 30mg mscontin 2x day and 1 750 vicodin in between. Unexpected trip ou of town, ended up overnight without rx. Sister let me use a 750 percoset plus 1 more 6 hours later. have never done something like this but was desperate. Went to pain mgt for new monthly rx and enede up with urine test 52 hours after last percoset. will it show up in drug test. I do not take extra meds, have never failed a test before