This document discusses the symptoms of paranoid schizophrenia, a subtype of schizophrenia. It notes that symptoms may include delusions of persecution or reference, auditory hallucinations like threatening voices, and smells or tastes that are not real. A diagnosis of paranoid schizophrenia requires satisfying the general schizophrenia criteria as well as prominent hallucinations and/or delusions, with relatively minor disturbances in other areas like affect, volition, speech, or catatonia. Common delusions include persecutory or grandiose beliefs.