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Does Gabapentin Cause False Positive Test Result For Methadone?

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Posted on Mon, 23 Mar 2015
Question: I have been taking Gabapentin 800mg 3 tabs a day for at least 2 yrs.My pain management doctor now says I have methadone in my urine, can that cause that
doctor
Answered by Dr. Dr. Matt Wachsman (36 minutes later)
Brief Answer:
no, sure can't

Detailed Answer:
but the test can just misfire
a hair test is highly accurate.
quetiapine
http://www.ncbi.nlm.nih.gov/pubmed/0000
common antibiotic
http://www.ncbi.nlm.nih.gov/pubmed/0000
tapentadol
www.ncbi.nlm.nih.gov/pubmed/0000
diphenhydramine
http://www.ncbi.nlm.nih.gov/pubmed/0000
http://www.ncbi.nlm.nih.gov/pubmed/0000
verapamil (4), diphenhydramine(5), or doxylamine
http://www.clinchem.org/content/51/11/2176.long
false positive with URINE/blood normal components (sheesh)
http://www.ncbi.nlm.nih.gov/pubmed/0000
herbal tea
http://www.ncbi.nlm.nih.gov/pubmed/0000 (hell, who knows maybe there is actual methadone in those herbal teas?!?)
fallibility
http://www.ncbi.nlm.nih.gov/pubmed/989579


No, not clear that gabapentin does it, but heck there are so many known and unknown things that the test is good for screening and discussion BUT needs a better confirmatory test before booting someone.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Dr. Matt Wachsman (7 minutes later)
He didn't boot me. Last month he said I was on oxy. He gives me lortab 10. I need to know this for my own peace of mind. I printed out your last months answer, and that was that. But now it's a new drug. Please help me.
doctor
Answered by Dr. Dr. Matt Wachsman (2 hours later)
Brief Answer:
Not sure what else to say

Detailed Answer:
that he isn't using a MASS - SPEC or hair test that looks at the individual molecules and instead using an immuno assay that anythhing that sticks to it, lights it up.
I gave you all the references there are out there to say, some tests can be very unreliable.
Note: For more detailed guidance, please consult an Internal Medicine Specialist, with your latest reports. Click here..

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Dr. Matt Wachsman

Addiction Medicine Specialist

Practicing since :1985

Answered : 4214 Questions

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Does Gabapentin Cause False Positive Test Result For Methadone?

Brief Answer: no, sure can't Detailed Answer: but the test can just misfire a hair test is highly accurate. quetiapine http://www.ncbi.nlm.nih.gov/pubmed/0000 common antibiotic http://www.ncbi.nlm.nih.gov/pubmed/0000 tapentadol www.ncbi.nlm.nih.gov/pubmed/0000 diphenhydramine http://www.ncbi.nlm.nih.gov/pubmed/0000 http://www.ncbi.nlm.nih.gov/pubmed/0000 verapamil (4), diphenhydramine(5), or doxylamine http://www.clinchem.org/content/51/11/2176.long false positive with URINE/blood normal components (sheesh) http://www.ncbi.nlm.nih.gov/pubmed/0000 herbal tea http://www.ncbi.nlm.nih.gov/pubmed/0000 (hell, who knows maybe there is actual methadone in those herbal teas?!?) fallibility http://www.ncbi.nlm.nih.gov/pubmed/989579 No, not clear that gabapentin does it, but heck there are so many known and unknown things that the test is good for screening and discussion BUT needs a better confirmatory test before booting someone.