PCP false positive with DXM?!?!?

[mono repin]

Just saw this experience report on erowid http://www.erowid.org/experiences/exp.php?ID=2876

Wanted to know if anyone had any additional information on whether DXM will cause a fasle positive for PCP drug testing. Wasn't sure if this was more appropriate for this section or drug testing.

Thanks.

[andruejaysin]

Beer isn't scheduled, but it's still a probation violation. They might wonder why you had enough DXM in your system to tranquilize a horse. Also heard it can give a false positive for opiates. Which makes sense, the optical isomer (mirror image, structurally) is levamathorphan, a potent painkiller.

[Weasel]

Holy Shit i might hefta to take a drug test tomorrow and i tripped on dxm tonight if i get a postive for pcp or anything then i get locked up has this been proven!?!?!?!?!?!!?!?!

[andruejaysin]

So what happened with your test, Weasel?

[lemonboy]

From my own experience I don't believe this is possible without immediate DXM usage prior to a test. DXM leaves your body within hours.

[Hempamasta]

From my own experience I don't believe this is possible without immediate DXM usage prior to a test. DXM leaves your body within hours.

That sounds about right.. but yes, DXM can definately give you a false positive for PCP or Opiate use.

[Dutchmaster]

it can happen ive heard about opitate false postives once but i dont understand are DXM and opiates that similar because i know PCP and DXM are both dissositives so the false positive there makes sense

[andruejaysin]

DXM is the optical isomer of levamathorphan, a powerful opiate, what is strange to me is that it gives a false positive for PCP, dissassociatives, sure, but no structural relationship.