What can cause a GC-MS test to have a false positive for morphine?

Answer:
What prescription medicines are you on? If you got something like roxicet there are opiates in it, and they all metabolize to morphine so you'll show positive but it's not false. There's also diabetes and kidney disease; they show up positive.
First answer by Jmowreader. Last edit by Jmowreader. Contributor trust: 1120 [recommend contributor recommended]. Question popularity: 1 [recommend question].