Pharmacy/Posistive Methadone test
Is it possible to get a false positive for methadone if you are a person with severe liver disease? Or would morphine ( that you are taking) be read as a methadone positive? I have a person who has liver failure who takes morphine who just had a methadone positive. This person has no acess on own to methadone which is why we know this person has not taken methadone. Please help.
When morphine is administered to a person it undergoes first pass metabolism to the extent of 50%, this means that only about 50% of the dose reaches the body system. It is metabolized by glucuronidazation to 3 and 6 derivatives.
Methadone is chemically very different from morphine, and there is no way that morphine gets converted to methadone.
Due the chemical difference between the two drugs I do not think it is possible for anyone to confuse morphine for methadone while testing (the tests are also very specific). I therefore do not think that by taking morphine one will test positive for methadone. Of course I am not ruling out a faulty test procedure or a wrong labelling of the samples.