Possible Lewy-body dementia. When he sleeps well he is completely normal (tells jokes, no confusion, eats and walks on his own, plays cards). If his sleep is disrupted it starts a downward spiral. He's slept poorly for the last 3 nights and today we had to feed him and help him walk because he was so caught up in his delusions. Doctor has him on 50mg of Seroquel at night and we've tried melatonin. She won't prescribe anything to help him sleep even when things get really desperate. I know that sleep medications in elderly can be dangerous and sometimes lead to cognitive delay but there must be something we can do.