I am beside myself with worry about the side effects on his organs and body. Also concerned about him not wanting to take Clozapine if he has huge weight gain. He was on Olanzapine when he was 16 and stopped taking it because of the hunger and weight gain. He is an honours engineer Uni student and just want him to be able to get back to his love of books/study. Is there always weight gain on Clozapine?