Consult your state regulations
In fact, if there is no law against it and the employee has met any other licensure and legal criteria, it may be illegal to deny them employment unless the basic nature of the empoyment is intrinsically too dangerous, or prohibitively expensive to facilitate, regarding the employee's condition. There are many poeple driving private autos with seizure disorder but sucessfully medicated. Commercial driving licenses may be prohibited (don't know the law on that but I think that would bar their driving). Nothing against dispatch, teaching, or even being an administrator?
I saw an excellent person who had one grand mal due to fatigue during a scout campout hounded out of the troop by other parents who did everything but accuse that parent of being possessed. Went on to cofound another trop, did fine!