Please, please don't let them give him Haldol. My father who was 86 at the time had a terrible reaction to Haldol. He was much, much worse than without it. It was in fact temporary and something he experiences only in the hospital.
My Mom passed away last year. Her huge problem had been a severe reaction to anti-anxiety drugs; when my sister and I flew home and got her released from the hospital and stayed with her until the drugs wore off, she was back to normal and lived well for a number of years in her own home.