The Comparison Between Positive and Negative Symptoms Severity in Prolonged Methamphetamine-induced Psychotic Disorder and Schizophrenia.

Introduction: This study aims to compare the positive and negative symptoms of schizophrenia in patients who had psychotic symptoms more than one month after discontinuation of methamphetamine abuse. These factors were analyzed by the positive and negative syndrome scale (PANSS) questionnaire.

Methods: Sixty participants were selected from patients referred to Iran Psychiatric Hospital with psychotic symptoms (delusions or hallucinations, disorganized behavior, and speech).