I am currently on ultram, robaxin, celebrex, lyrica, flexeril and vicodin for pain associated with a thorasic fracture. I recently had a urine test at my pain clinic and they said that oxymorphone showed up. How is that possible, I did not take it. I had never heard of it until then and had to look it up online to find out what it is. I am wondering if the combination of what I do take can show up as a false positive somehow? Is there a chemist out there somewhere? Please I need to know if this is possible or if the lab screwed up. Thank you.