My father is having paranoid hallucinations. Where do you get help for psychosis?

My mother, who has dementia, also had psychosis with paranoid hallucinations. Her dr put her on Seroquel 25 mg 1x day, which has helped immensely, and she sleeps better. Maybe your father would take it hidden in something he eats, just once a day. Ask his dr what he thinks about that. Good luck with your dad!