hes got BPSD im informed. the professionals have said that because he had an awful temper before, hitting and pushing me, then that will get worse as he advances. hes got COPD which is whats frustrating him and bringing him down because he cant go far without being breathless. he cant do what he wants because of it. thats why they gave him amitriptyline to calm him down . they are going to give him sertraline and if that interferes with his other tablets then they will look at mirtazapine.I don't know if this helps but someone I know whose husband had mental health problems with anger issues and alcoholism developed dementia and was put on mirtazapine which I think seemed to help or it might just have been his dementia progressing when he went on to a less difficult stage. I think the anti-depressant idea might help - it may be underneath he is depressed which expresses itself in temper and haranguing you.
I hope they can think of something that might make things better and calmer for you.