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Drug test negative for my prescription?!?!

I've been prescribed oxycodone 10 mg for months. While I was taking it, I realized I was going to run out before I could get to the doctor for a refill and a drug test. So, I urinated in a clean container, put it in the fridge for around 2 weeks. On the day of the drug test, I took it out of the fridge for a few hours and then I heated it up to correct temp and away I went to take a urine test. The doctor comes in and said I didn't show any oxycodone in my urine but I did test positive for tramadol!??? Why?? Help!!
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20803600 tn?1546262537
Just FYI- for anyone currently in pain management or taking opiates long term- using the methods described in the original post to try to pass a urine test is AUTOMATIC grounds for dismissal , immediate stoppage of opiates , and does not work.
Medication compliance testing is very precise and measures the amounts of metabolites of a particular medication and levels of medication taken . This serves two purposes- to ensure you are taking medications prescribed to you and ONLY in the amounts prescribed.
Any attempt to skew urine testing is considered an automatic fail and can result in blacklisting and notification to your insurer , pharmacist and other drs you see. Failed tests become part of your permanent medical record.
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Hi, FYI I have been on the same side of clonazepam for 30 years for cyclic vomiting syndrome.  I got a new doctor and had my first drug screen.  I tested negative.  They tried to send me to my neurologist. I got the PA instead who tried to talk me into going off of it. I said no and went back the the GP. It turns out that I was supposed to be fasting.  She should have told me since I never had a drug screen before. When I went in fasting it was positive in the urine but it was totally metabolized and negative in the blood. Clonazepam is supposed to last a few days in the system.  I insisted that I had never gone off of it. She finally asked the pathologist who said I was an "overmetabolizer" as I had piles of the drug in my urine.  So now I just go in fasting and it came up positive.  What a hassle.  There are new rules this last year because a lot of people committed suicide due to being dropped off their drug. They supposed to be a little better. Clonazepam is not even an opiate. I hope this story helps someone.  And, no DO not ever cheat on a drug rest. It causes the rest of us  who are complying, a lot of trouble.
I meant same dose not side.
Clonnazapam may not show up in some urine testing- depending on the type of testing or screening done. It may require a special type testing - again depending on which testing your prescribed uses-

“The presence of benzodiazepines varies a lot by each medicine's half-life. Half-life means the amount of time it takes for half of the medicine to be eliminated from the body. Diazepam, for example, can be found for weeks after the last dose.

Although most benzodiazepines show up in standard urine tests, some don't. Alprazolam, clonazepam, temazepam, and triazolam may not be found in many of the common tests. Many benzodiazepine tests can find whether the medicine is present, but they can't give the amount.”
Sourced from - https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=167&contentid=benzodiazepine_urine

20803600 tn?1546262537
If you are running out of your prescribed oxycodone at ANY point prior to a refill appt- you can not be taking the medication as prescribed.
Also cheating on a urine test is useless and normally results in automatic termination.
Urine compliance testing tests for the metabolites of a particular medication and the levels to ensure you are taking it exactly as prescribed.
Tramadol is a different drug - and should not show up in a urine test  if you have not taken it. The urine in the refrigerator would also not show oxycodone taken weeks ago and stored.
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