meekandhumble,
Though office drug tests are good, they are not infallible. You can ask to have a sample sent for a GC/MS analysis. But, you will probably have to pay for it.
The gas chromatograph/mass spectrometry instrument can determine everything that is in a sample, and the amount.
There are cases of alcohol showing up in the urine a diabetics, but this is usually when they are in crisis. Once they hit this stage, the death rate is very high.
There are cases of instrumentation being contaminated, causing a false positive. However, that should not occur every time.
If it is contamination from something you are using, those alcohol products usually contain quite a bit of isopropal alcohol, so a GC/MS would pick up both the isopropal and ethyl alcohol, proving it was a contaminant.
But, in any case, you are going to have to have a long talk with your physician. Pain management is based totally on trust, and this is going to have a big impact. You need to get the physician to understand that you do not drink any EtOH, and what can you do to show him this, other than the testing. Or if they will send a sample for the GC/MS testing.
(Of note, in the military, no drug test is considered positive until it has been shown to be positive on three different types of testing, the last one being the GC/MS. And only if it is up to a certain level. The military does not use, "any detectable level" because of the overly high false positives rates when that is used.)
Hope you find out what is going on. If you do, please let us know, so that other members can be helped with that knowledge. Good luck.