My daughter of age 16 is being treated for organic psychosis since three years on arpizole and valparin,but of no significant improvement.the one noticeable problem with her is that she speaks often to herself so loudly from the bottom of her throat that we are unable to bear the brunt of her voice, leave alone the neighbors.the sound is so loud and horrible that it renders us helpless, drives us furious and mad .kindly advice.