differential diagnoses for paranoid schizophrenia

[mhielen]

what are the differential diagnoses for paranoid schizophrenia aside form substance induced psychoses?

[corlenbelspar]

If I remember right it has to occur all naturally and it's impossible for them to diagnose Schizophrenia if the psychosis was induced from illegal drugs.  I also read it's impossible for them to diagnose it if a person has Bipolar Disorder and Autism but I think this was a lie because I've heard of plenty of people diagnosed with both sets.  Maybe the psychiatrists doing it are just doing it wrong because I thought if a person seemed Bipolar and Schizophrenic at the same time then they went to Schizoaffective Disorder.  I read Schizophrenia can also be caused by a B12 deficiency which made me think wow that's messed up that a little deficiency can f*ck you up THAT much.

[ILADVOCATE]

Paranoid schizophrenia is one type of schizophrenia, involving paranoid delusions which include delusions of persecution. There are two other types of schizophrenia as well. Substance abuse induced psychosis may or may not be schizophrenia although taking illegal drugs can increase the chances the onset of schizophrenia and its severity.