My husband is starting to exhibit 'sundowning' behaviour more and more. Looks at me with disdain and accuses me of taking his things and giving them away to others. His mood towards me is often black, he refuses to follow my orders, e.g. "Would you please wash your hands - yes, we have to wash the hands when we come home", "Will you please let me give you the puffer" and then when he finally does it he breathes in through the nose although I plead - "you have to breathe in through your mouth", "Please, sweetheart, take your medicine now", etc etc. He feels bullied and nagged but I have to do this to preserve his health. He asks "why" at every turn and then ignores or cannot understand the explanation. Is there a medication to calm him down, to make him more cooperative?