I have been taking vicoprofen for a couple of years for my TMJ and a torn meniscus. My dr. started asking all patients' with a narcotic Rx to take a drug screening; which is fine with me. I took my test today and everything came back clean... including for opiates, which vicoprofen is. I didn't think anything of it, but they looked at me like I was doing something wrong. I called a nurse friend and she said they may think I was "cleaning my sample", even though a nurse came into the bathroom with me. I am mortified and I have no idea why vicoprofen would not show up! It is wierd that I feel like I have to prove I am taking my meds... usually people are trying to find a way out of the drug screening. It was a urine/panel test. Is there a different test they should have used?