I am on probation and today I cam up with a false positive for opiates. I don’t take opiates other than them being prescribed for me several years ago for oral surgery and I know that it wouldn’t show up years later. However, they are sending a sample to the lab to be tested which will be the confirmation test using what I assume will be the GC/MS testing. When they test using this method, do they look for the specific substance one would come up positive for or do they test for everything. I am sure that whatever caused the false positive for the opiates will be cleared up, but I’m not so sure if they test for something else.