I don't have schizophrenia myself, but I met someone who has it and has a really incredible therapist. He told me that the medications don't entirely get rid of the voices. That's where therapy comes in. It helps you to cope with the voices that you still hear. And to realize that you don't have to do what they are telling you to do. It really seems like a good therapist can be invaluable if you deal with psychosis.