My daughter's primary physician took her off of oxycotin cr due to her urine labs coming up negative twice. I give my daughter her medication so I don't understand how this can happen. Her other medications are: Keppra, Paxil, Aldactone, Levora, Dilaudid and docusate at the time the tests were taken. I had a separate test taken, a Oral Fluid Substance Abuse Panel. The results were positive for hydromorphone which I understood to be the Dilaudid. The other substances that were noted on the lab report were: methamphetamines, amphetamine, cocanine metabolites, marijuana, codeine, morphine, hydrocodone, 6-monocetylmorhine and phencyclidine all came up negative. Should have the ocycotin cr be postive in any of the catagories listed above noted as coming up negative?
Q: Lab Results when taking Oxycotin 30mg every 8 hours along with Dilaudid
I'm not positive but I don't think oxycodone would show up in the substances you listed from the Oral Fluid Substance Abuse Panel.
There are three possible reasons for a false negative on a urine drug test, other than the obvious one of not having taken the medication or not having taken it properly.
1. Urine drug screens are set to a particular cutoff level and will only show positive for the drug in question if a specified amount of the drug is in your system. It's possible that the cutoff level for positive on the test she took was unintentionally set too high. In that case, although she may have had the drug in her system, she may not have had enough of it to show positive on that particular test.
2. The drug screen was incorrectly administered or the specimen was tainted, switched or tampered with (accidently or intentionally) between collection and processing.
3. The drug screen was misinterpreted and/or recorded incorrectly.
In the future, you might consider asking her doctor to do a blood test or some other alternative and more reliable form of testing to prove that she's taking her medication as she's supposed to.
You might also talk with your pharmacist to see if there are any other reasons that the oxycodone might not show up – for example, could the other medications she takes mask or have any other effect on the oxycodone?
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