What is the best way to calm down a drunk person?
In my experience, giving them red bull and sugary iced tea counter acts the punch drunk effects. It works real good at making them reasonable. Offing you gots a caffeine pill that helps sometimes too.
Put him or her on a couch and make them sleep. Usually works
Tell them your gonna call the police. That should work.
Just try to avoid them or the situation if you can.