Background: Personality disorders are considered as a risk factor for the development and intensification of substance dependency. This study was aimed to determine the comorbidity of substance dependency in patients with cluster B personality disorders.
Method: This cross-sectional study was performed on 96 patients (71 males and 25 females) referring to Farabi Hospital, Kermanshah, Iran .The data were gathered using a questionnaire. Data analysis was performed by SPSS software.
Data analysis revealed that borderline personality disorder with one year substance abuse, combination of histrionic, borderline, narcissistic and anti-social disorders with two years of substance abuse, borderline personality disorder or a combination of borderline, histrionic, narcissistic and anti-social disorders with three years of substance abuse and combination of narcissistic, borderline, histrionic and anti-social disorders in patients with more than three years of substance dependency had the highest prevalence. Narcissistic personality disorder in patients with no attempts to quit and combination of histrionic, borderline, narcissistic and anti-social disorders in patients with two or three attempts to quit had the highest prevalence.
Conclusion: The results showed a relationship between substance dependency and cluster B personality disorders. Considering the prevalence of personality disorders among drug abusers, psychological and psychiatric interventions along with medication are necessary in substance abuse treatment centers.