My family doctor will sometimes prescribe antibiotics without knowing for sure if the disease is a virus (for which antibiotics don't work) or bacterial. Or prescribe an antibiotic that doesn't work on whatever bacterial infection is going on and have to prescribe another.

But assuming you are in a position where a family doctor has prescribed something that is/seems wrong, I am sorry you are in that position. Can you make an appointment with a psychiatrist, and ask for more than the usual 15 minutes?