False Positive Drug Screen.....WHY is this happening

[Cruezing]

I have recently had two urine drug screens come back showing trace amounts of Oxycodone.  I have NOT taken this drug.  I suffer from severe chronic pain in my back and have been prescribed Dilaudid for almost 3 years, which I take regularly on a daily basis and without it I am totally bedridden.  I recently changed doctors and as part of a Provincial Program for regular use of controlled narcotics, I have to submit to random drug screens to prove I do not use illicit (street) drugs or any medications that are not prescribed to me and that patients who are prescribed narcotics are not selling them and not taking them.  I am absolutely fine with this program and confident submitting to the testing because I take my prescribed medication regularly and have absolutely nothing to hide.  I have submitted two samples of urine on two different occasions 6-8 weeks apart and both results came back showing my Dilaudid but also showing *trace* amounts of Oxycodone in my urine sample.  Why could this be happening to me?  It is threatening my treatment and making me look dishonest to my new doctor, as people who DO use drugs they are not prescribed and street drugs always say they didnt' use them when their results come back positive.  Of course, I am telling him this as well and he is saying every patient he has will deny they didn'[t do the drug when their screen comes back positive, just like I am saying to him!!  I need to know what I can suggest as testing to prove it is something in my system causing this false-positive result and also an explaination for him why it is showing trace amounts of Oxycodone when I have not taken any of this drug.  Medically, I usually have protein in my urine on testing in small amounts from kidney damage years ago and have rheumatoid arthritis.  I have no other medical conditions that I know of, which is also a concern, as I am worried because I have read so much online that this test result may mean something is awry in my system and showing up in a different way....(eg: diabetes, kidney failure etc).  Can someone with expertise in the lab testing area please help me bring some information forward to my doctor in terms of what I should be tested for as I may have a rare molecule in my urine etc........this is threatening my treatment with my regularly prescribed medication and I have to prove i am not taking ANY Oxycodone and not lying about it.  Please help if you know anything I can research or suggest to him that we test for.

[Cruezing]

Hahaha oh I SO wish it was that easy, but he showed me the paper with the results on it and my Dilaudid shows as a 1 1/2 inch black bar with a mmol/L (I think) reading and the Oxycodone says *trace amount* beside it.  It wasn't just a verbal load he was giving me of crap to test me.

[caregiver222]

Generally, the drug-screen test is for opiates.

You are taking Dilaudid, which is an opiate.

I suspect you were simply orally challenged to test your response.