Relationship between Personality Disorders and Types of Drugs Used in Addicts

Given the importance of drug addiction, this article aims to study the current relationship between personality disorders and types of drugs used (narcotics and stimulants) in Iranian addicts. The sample consisted of 285 drug addicts including 132 narcotic addicts and 153 stimulant addicts selected randomly in several phases. Data collecting process was accomplished by means of clinical interviewing based on DSM-IV criteria for addiction, Addiction Severity Index (ASI), and Millon Clinical Multiaxial Inventory – III (MCMI-III). Using Pearson correlation coefficient and regression, the gathered data were analyzed. There was a significant correlation between stimulant consumption and histrionic personality disorder (p < 0.001) and antisocial and narcissistic personality disorders (p < 0.05). Besides, correlation between avoidant, histrionic and narcissistic personality disorders (p < 0.05) and depressed, antisocial and borderline personality disorders (p < 0.001) with narcotics consumption was significant. In total, there was a significant correlation between cluster B personality disorders, and narcotics and stimulants consumption in surface (p < 0.001). In addition, this relation was explored between cluster C personality disorder and narcotics (p < 0.001). The results of this article in terms of personality disorders and types of drug used match with the previous studies results. In order to provide medical treatment, it is necessary to find out which kind of personality disorders addicts suffer from.