I've got multiple relatives with schizophrenia -- or at least, did. Only one still on the medication, the rest have discovered that all they needed was more b-vitamins in their diet!
Can you imagine? Years, and years, and all they needed was more b-vitamins... There are a lot of drinkers in my family, and it turns out that drinking depletes your supply of b-vitamins and thereby they end up needing more than is usual.