From knowledge of being in a state hospital where they did breathalizers on each trip back from home visits, meds as far as i know cant do that. It may make her fail the field test (walking ten steps ahead heel to toe), because it can intesify the dizzy, and sleepy effects just because the two combine both have that possiblity.
I know when i was on cymbalta and drank 2 cherry vodkas it was so bad that i didn't even experience that when i drank loads and had a few shots in one night.
Things like mouth wash can affect it and give the breathalizer a false posistive. but once they take them in they have to take blood and look at the alchol level in her blood, and that as far as i know doesn't give false positives.