I am not an expert but I have experienced something similar in my family. My dad had Alzheimer's that was aggravated and made more serious by going under anesthesia for back surgery. Afterwards, he was having dementia-related psychosis. We asked for a consult with a psychiatrist and he put my dad on Seroquel, another atypical antipsychotic, even though it is not recommended for elderly people. I think there is an increased chance of them having a stroke. But my dad needed to be calmed down enough to where he could take nourishment or he was going to die anyway. And the Seroquel helped do that for a while. It ended up that his own bull-headedness about walking on his own ended up bringing him down, and two broken hips did him in. I tend to think/hope that the doctors know what they are doing because they are the ones with the education and (hopefully) wealth of experience. With my dad taking Seroquel I was able to have some meaningful conversations with him before he passed on. Carolyn