Hi, I am seeking information for a client involved with the legal system who also suffers from kidney disease. I have two questions. Have you ever known any of the following medications to falsely test positive for cocaine; Hydralazine, Carvedilol, Amlodipine, Renvela-Sevelamer, Dialyvite, and Calcium Acetate? Have you ever heard of or known kidney disease and/or dialysis in itself to cause a false positive for cocaine on a drug test? Any information is appreciated.

I have not seen this and am unaware of any false positive reports regarding dialysis patients and cocaine testing.  I would suggest that you consult with a toxicologist for a major laboratory company.  I think there are several ways to perform the cocaine testing and some of those different methods of testing may have more false positives than others.

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