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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Will High Doses Of Tagmet Causes Positive Result For Suboxin Drug?

My question is my ex husband took a drug test last week. he failed by testing positive for Suboxin. He has never been prescribed that. His doctor claims it could be cause by a false positive due to use of Tagmet. The Dr. says she believes that the ingredients in tagmet when taken high doses of can test positive for a Suboxin drug????? Is that possible?
Tue, 21 Mar 2017
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General & Family Physician,  's  Response
Hi, thanks for your question.

It is not possible for cimetidine to give a false-positive result to suboxin. The only connection cimetidine has with suboxin is that it reduces the breakdown of suboxin, so makes it act longer. It does not cause a false-positive result.

However, there are other drugs which cause a false-positive result to including diphenydramine, and antibiotics such as ciprofloxacin, rifampicin which should be excluded.

I hope i have answered your question.

Warm regards.
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Will High Doses Of Tagmet Causes Positive Result For Suboxin Drug?

Hi, thanks for your question. It is not possible for cimetidine to give a false-positive result to suboxin. The only connection cimetidine has with suboxin is that it reduces the breakdown of suboxin, so makes it act longer. It does not cause a false-positive result. However, there are other drugs which cause a false-positive result to including diphenydramine, and antibiotics such as ciprofloxacin, rifampicin which should be excluded. I hope i have answered your question. Warm regards.