Hello and welcome to Healthcare Magic. Thanks for your query.
Usually, drug screens are specific for specific drugs and the chances of false positives are very minimal. None of of the prescription or OTC medication which she is taking is known to cause a false positive test for opiates.
So, it is unlikely that the positive drug test
is due to any of these medication. I would suggest that she has a review / re-evaluation with her treating psychiatrist
to check for the possibility of a relapse of her drug use.
Wish you all the best.
Dr. Jonas Sundarakumar