Hey City, While doing some research for another thread I came across this and though people may find some use. Its a list of drugs that can show up on a drug test and the conditions that they will show up. http://www.ncsconline.org/wc/public...19Pub.pdf#search="propoxyphene and drug test" The top shows substances either added to the sample or in the user before the test was performed and the results. The bottom shows drugs that show up and at what levels and time frame Just thought some people out there may be able to put this to use