Every 2nd day things start off well but around 3pm something annoys Mum and triggers off horrible complaints, ranting and generally going over and over the same old family disagreements. She runs out of energy about midnight and nothing distracts her. Is this 'sundowning'? It is hard to take after a while as it gets really personal and hurtful ( nothing wrong with her memory there). I have to walk away at some point ( or rather go upstairs ) but how long should I really leave her alone when she is like that. She is so unhappy and sits and mopes or walks out ( she does not get far ).The minute i get back it just starts up all over again. Mum is on donepezil and I have tried to slip her a lorazapam on the worst occasions but to no real effect as far as I can see.