re: Help dealing with someone with Dementia

If he truly has dementia, and his capacity for competence has been deemed inadequate by a physician, and he is as unruly and abusive as you say, then he will eventually be chemically restrained until he is made compliant enough for someone to safely care for him.

This may or may not involve IM Haldol until he is compliant enough to regularly take Seroquel et. al.