Overmedication occurs frequently in the beginning of treatment, as the psychiatrist works to determine the appropriate dose.
In all my years as a student (in the 1980’s and 1990’s) and as a Rebbe (the past decade or so), I have only known one Rebbe who hit a student. He was wrong.
I know more than a few parents who hit, and nearly all of them are wrong, as well.
It is an extremely rare situation that calls for corporal punishment in an educational setting (whether in school or at home), and even in such situations it is often not the correct course of action.