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Diphenhydramine or prozac causing false positive for benzo test - official info?

Discussion in 'Drug testing discussion' started by stuoolong, Jul 17, 2012.

  1. stuoolong

    stuoolong Silver Member

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    Hi all

    SWIM has tested positive for benzos and may not get their dream job as a result. SWIM has not touched benzos for at least a month.

    SWIM has read on this forum and elsewhere that diphenhydramine (quite commonly) and prozac (less common) may cause false positives for benzos. SWIM takes both these drugs every day. Nothing else they have taken could possibly have caused a false positive.

    SWIM is aware that a GCMS test will resolve the issue, but the problem is convincing the potential employer to pay for the GCMS test. The employer does not believe that either of these drugs might cause a false positive, despite the fact that a quick google search reveals it to be common knowledge.

    However, all I can find is anecdotal evidence. So my question - does anyone have links to any official information on this? Research articles, government health websites, anything like that? SWIM hopes that with such a document in hand, they might persuade the employer to pay for the GCMS test.
     
    Last edited: Jul 17, 2012
  2. profesor

    profesor Silver Member

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    I don't mean to pry, but why is this your dream job? Because, this jerk does believe in false positives, in fact he knows they happen, he would have this information from the testing lab. He just doesn't want to shell out the extra money. What do you think this guy will do when its time for a pay raise or maybe a holiday bonus? Think about job interviews as a time when you get to learn about who you will work for, not just them putting you under the microscope. This guy has just sent out a red flag-- he doesn't give a shit about you or if you really were clean or not. Now you're going to run to him begging for a second chance-- if you did get the job, he'd exploit you for all you were worth. I'd cut your losses and run the other way. I half suspect they were selling you this job as a "dream job" when the reality is a lot different. They know there's another sucker whose gonna come along and test clean, even he was really using and by chance it didn't show- they just don't care as long as appearances are good. I'm going to try and mellow out now, before I start throwing things across the room and ranting about "the Man." :mad:
     
  3. stuoolong

    stuoolong Silver Member

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    Hi Profesor, thanks for your reply. Firstly, Someone Who Isn't Me still really wants the job and would rather do everything possible to get it than just run away. We think it's completely fair to ask them to do the test, just need some backup to convince them that it's worth their while.

    Second, even if SWIM wasn't that excited by the job, long unemployment and inability to pay bills means that getting work is a priority. Where we live, there are few jobs around and hoping that another one comes along soon isn't a very attractive option. There is always another sucker that comes along, so you have to tick every box - otherwise the other sucker gets the job.

    Third, since SWIM is unprepared to stop taking diphenhydramine, this is bound to come up again next time they have a test.
     
  4. FunkyNotAJunky

    FunkyNotAJunky Silver Member Donating Member

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    It sounds like your only two choices in this situation are

    1. pay for the second test and maybe get the job

    2. don't pay for the second test and def not get the job

    The reason companies require you to pay for a second test is because false positives rarely happen.

    Did you provide the MRO with a list of all prescribed and OTC drugs you take?
     
  5. stuoolong

    stuoolong Silver Member

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    Perhaps that's an option, depends on how much it costs. SWIM may look into that, but it's probably too expensive.

    :(

    Yes, SWIM did that, even admitting to the prescribed benzo they took five - six weeks ago. Drug testing nurse said the test can be positive for up to 45 days and passed SWIM's test as they appear professional and trustworthy, but the doctor (nurse's boss) over-ruled this, insisting that their positive test means that SWIM must have had benzos in last 48 hours - therefore, failed test. Drug testing doctor has too much faith in said drug test, imho.
     
    Last edited: Jul 17, 2012
  6. nthensome

    nthensome Newbie

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    I am in drug court and they have some hxc drug tests. Panel and labs. I have been on prozac for 3 months and have never failed.
     
  7. undecidedx

    undecidedx Newbie

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    I'm on probation and have to piss every week. I was taking diphenhydramine every night for a while, in large doses, and testing positive for methadone. They'd send it to a lab and it'd come back clean, but the dip-stick test would come back positive for methadone. Not sure about benzos though.
     
  8. stryder09

    stryder09 Silver Member

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    Benzodiazepines are not detectable in urine up to 45 days. Typical window of detection for most benzodiazepines in urine is 1-5 days.
     
  9. kailey_elise

    kailey_elise Gold Member

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    It depends on the benzo, and how the person metabolises it.

    But it certainly can trigger a...er, well I guess it would be a true positive, since you really did take it.

    But I was given Librium in detox once, and couldn't start Suboxone until I came up clean for benzos, and it took a month to finally piss clean for benzos - and I didn't take any other benzos at the time.

    ~Kailey