Psychotic syndromes are divided into affective and non-affective forms.Even among the non-affective forms,substantial differences exist.The aim of this relatively brief review is to synthesize what is known about the differences between two non-affective psychoses,schizophrenia and delusional disorder(DD),with respect to clinical,epidemiological,sociodemographic,and treatment response characteristics.A PubMed literature search revealed the following:in schizophrenia,hallucinations,negative symptoms and cognitive symptoms are prominent.They are rare in DD.Compared to schizophrenia patients,individuals with DD maintain relatively good function,and their delusions are believable;many are beliefs that are widely held in the general population.Treatments are generally similar in these two forms of psychosis,with the exception that antidepressants are used more frequently in DD and,for acute treatment,effective antipsychotic doses are lower in DD than in schizophrenia.It is with the hope that the contrasts between these two conditions will aid in the provision of safe and effective treatment for both that this review has been conducted.
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