Hi I'm quite new to this page & have looked a few times but things are now at crisis point & I need advice. My dad was diagnosed with Alzheimer's the beginning of last year at the age of 66. Just before diagnosis he was very irate all the time, very nasty & very aggressive (mentally not physically). He got diagnosed & he has been up & down with his moods!Sometimes we go a few weeks & he is ok then we have weeks of a terrible mood where he is so nasty to my mum it's awful to sit & watch but unfortunately after a massive row with him in April which led to him being right up in my face that I thought he was going to headbutt me & warning me that if I argue again with him he will throw me out I can't get involved but what I am witnessing is domestic abuse (again not physical yet but mental abuse).I don't really know what to do!Is this normal behaviour for someone who has dementia?We have been told he is only early on in the disease but if this is how he is early on in the disease what are we going to do as he gets worse? He is on antidepressants & also medication to help his memory.My mum isn't coping & he has so much control over alk of us!I'm scared to do anything he doesn't like as he takes it out on my mum & blames her for anything that we do that he doesn't like! If I go on a night out he makes her stay up for me coming in (I'm 32 years old!!!!!) & then gets her up early.He doesn't do anything in the house like the dishes or make dinner or go food shopping & leaves it all to my mum then complains about what she has done/bought!He has always had a temper, been controlling & has OCD but nothing like this. Is this the disease or is he just using the disease as an excuse! He has also stopped going out & blames my mum for that saying she stops him but when she says why don't we go here he acts like a spoiled brat & says no you have ruined it!He is just a horrible nasty man & I'm so stuck as to what to do!I went out with my mum today as he was just picking at her all morning & she has spent the day crying which is awful to see your mum so down! Can someone please let me know if this is normal & if so give me some advice on what to do/ how to deal with this.