When they test for
M'done in urine
(at least on a clinic) they test for
it's metabolite (called EDDP for
short) & it's ratio to creatinine levels,
There is a drug called Bentyl (Dicycloverine) prescribed for
IBS that can potentially cause a false positive
. There may be others too. It also depends on how good the lab is that is doing the testing
. Sometimes there's sloppy work or cross-contamination, particularly in the 'collection' phase.
I'd request a retest.