I see a lot of commenters making statements about Miriam Carey having schizophrenia due to the fact that she was on an antipsychotic (risperidone, also escitalopram an antidepressant) and that she was actively delusional. And I just wanted to remind all my lovely pals at the Talks that schizophrenia is not the only mental illness that may have psychosis. Major depression and Bipolar disorder may also have psychotic features that include hallucinations and delusions. This is why it is very important for any psychiatrist to take a good history of someone when they present with psychotic features before prescribing them medications. Some meds will be similar, to treat the psychosis you're often going to have something like risperidone in there. Other meds will be different, many psychiatrists don't like the idea of prescribing antidepressants for bipolar disorder due to the risk of inducing mania. If a person has schizophrenia along with depression they may be prescribed an antidepressant, otherwise they wouldn't.
Fun fact: Bipolar disorder is often misdiagnosed as PPD.