Hi, firstly, I am so sorry to hear you are going through such a tough time with your sister. It is so hard to cope when someone you love so much is in such clear distress. My dad was diagnosed with Early Onset last March and in the years leading up to his diagnosis he suffered a lot with his mental health. Even though he is often now in denial of his condition (or simply does not remember what is wrong) he has mentioned several times that if he ever "ends up that way" (as his Mum, my Grandmother, also had dementia, which was awful for us all especially towards the end) then he'd rather a bullet in his head. It's hard because you want to respect what they must be experiencing but there is little we can do really (not going to shoot my own dad clearly...)

Myself and my family talked it through and he went back on antidepressants which he was on pre-diagnosis. I would say that this has made a great impact to his general mental well-being, of course there are still bad days, however it seems to have allowed him to let go of the anxiety and fear.

The difficulty with Alzheimer's is that it is often not easy to discuss issues with your loved one if they are not lucid, however, I would suggest that first and foremost (if you haven't already) definitely reach out to your GP and try to get hold of a therapist/counsellor, I have found that talking therapy has been a lifesaver for me (quite literally) when coming to terms with/dealing with my dad's condition. You must put on your oxygen mask before helping those around you to put on theirs, as they say. What I mean by this is that if you are not being supported then you can't effectively provide support for your sister. I would also say it is essential to speak to a professional about options in regard to dealing with these emotional outbursts. Antidepressants have been vital for my dad as we tried to get him to see a therapist for a while, but when he does not remember what the problem is, he can't exactly talk it through. The anti-depressants aren't a cure-all and it may take time to find the right ones but do not feel that all hope is lost, they may be the best way to manage your loved one's mental health.

Taking the step to put your sister into residential care must have been a difficult, albeit essential one, as now they are under watchful eye 24/7 which at least can provide some comfort that they cannot cause any harm to themself. I can assure you that you are doing the right thing, and looking into support available to you is especially important. Try to remember that poor mental health is to be expected as you can imagine your sister must be dealing with a great deal of emotional stress at this time, antidepressants can at least provide some solace from this and may a good step in the right direction.

This platform is also extremely helpful when it comes to seeking advice as I can assure you, you are not alone, even though I'm sure it often feels that way.

I hope you find a solution that works for you, but please keep going and remember you are doing all you can.

All the best,
BM00

(Edit) I also wanted to add; It can be so hard to hear that your loved one blames you for their problems but this is not a personal attack, I know that my father often gets angry with us for his problems as in his mind he is right and it is the world around him that is wrong, you are not to be blamed here, no one is. Please don't lose hope and keep trying to get through to her, even when it feels like you are not appreciated for it.