OBJECTIVE Adolescents who regularly use marijuana may be at heightened risk of developing subclinical and clinical psychotic symptoms. However, this association could be explained by reverse causation or other factors. To address these limitations, the current study examined whether adolescents who engage in regular marijuana use exhibit a systematic increase in subclinical psychotic symptoms t...

For diagnosis of patients with comorbid psychotic symptoms and substance use disorders (SUDs), Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, makes clear distinctions between independent psychotic disorders (eg, bipolar disorder, schizophrenia) and substance-induced syndromes (eg, delirium, dementias). Most substance-induced psychotic symptoms are considered to be short ...

Abstract Background: Methylphenidate is one of the classic amphetamines which can cause or exacerbate psychotic symptoms in schizophrenia patients. Methods: In this paper, a young man is presented with injection of methylphenidate tablets with acute cellulitis due to this injection and the related symptoms. In the first hospitalization and after recovery from psychotic disorder due to ...

It has been hypothesized that a Theory of Mind (ToM) deficit could be a vulnerability marker for psychosis. Recent studies, however, have shown ToM deficits in affective relapses of bipolar disorder as well as in the euthymic phase. This study analyzes the relationship between ToM and a previous history of psychotic symptoms in bipolar disorder. ToM, sustained attention and executive functions ...

objective : poor premorbid adjustment has been reported to be a predictor of more severe psychotic symptoms and poor quality of life in such psychotic disorders  as  schizophrenia.  however,  most  studies  were  performed  on chronic schizophrenic patients, and proposed the likelihood of recall biases and the effect of chronicity.  the aim of this study was to investigate these factors in a sa...

BACKGROUND Establishing the cognitive phenotype of psychotic symptoms in Alzheimer's disease (AD) could localise discrete pathology and target symptomatic treatment. This study aimed to establish whether psychotic symptoms would be associated with poorer performance on neuropsychological tests known to correlate with striatal dopaminergic function and to investigate whether these differences wo...

ôbjective: â rare phenomenon of shared psychosis disorder occurring in the context of bipolar ï disorder, in identical twins is reported. çase presentation: two identical twins with shared psychotic manic syndrome were admitted and received antipsychotic and lithium as their treatment. psychotic symptoms of primary case did not improve and her diagnosis changed into schizophrenia. they had hypo...