r doctor specifically said "opana
That's a bit odd.
is just the brand
for Oxymorphone, and the ER just means "extended release" (as opposed to the IR, "instant release").
A doctor telling you
tested positive for opana
ER would be like telling someone that they tested positive for Norco 10/325.
Drug screens/tests just aren't specific enough to determine brand
s of drugs, let alone whether it's the ER or IR version of the drug.