question about disruptive behavior

I haven't posted here in a while but my fathers alzheimers is getting worse. I don't know what to do. For the last week he has not slept hardly at all during the night at the nursing home. He hollers and screams at the top of his lungs and he can't be still. He has fell once and hurt his hand real bad but he didn't break it. They have had to restrain him in his chair in the daytime. I don't mind it because I don't want him to hurt himself. We have had all kind of tests done and there is nothing physical wrong with him. There has been talk of sending him to a physciatric hospital because of his disruptive behavior. He keeps every one else upset when he hollers all the time. He can't take alot of medicine. It upsets him even worse. They have tried alot of medicine that he can take and nothing seems to work. What happens at the physciatric hospital and how long do they have to stay? I don't want him to go but I may not have a choice. I see their point.

Thanks