4 years ago they tried haldol, risperdone, zyprexa, and another i forget the name over the last 3 years. Clozapine is the only one that made the voices and fx quiet for me. I also developed multiple mind techniqques along with unconventional means of stopping the attacks i get. He is likely experiencing a simulation effect which means his voices or what he hears and sees may be trying to get him to act on whats being presented. For me my voces kept accusing me of things and telling me to do things to get arrested. They would just increase the grinding brain sounds if i fought or disobeyed. If you want some advise to help him. I would need some details of whats happening exactly with his symptoms so i can try to help. Please PM me on this site if you want help. The determination of his danger is up to you ultimately. But ive seen people including myself go nuts when it starts happening. im just glad i have rational and logical thought that trancends the attacks attempts to deceive me.